Dog Age Calculator
Dog years to human years, adjusted for size.
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All 330 free online tools
Search by name or filter by category. Every tool has its own page, works without an account, and most of them never send your data anywhere.
Everyday Tools
Timers, counters, pickers and the small tools you reach for daily. About everyday tools.
Cat Age Calculator
Cat years to human years, with life stages.
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Zodiac Sign Calculator
Star sign from a birth date, with element and dates.
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Chinese Zodiac Calculator
Chinese zodiac animal and element from a year.
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Birthday Countdown
Countdown to a birthday, with the weekday it lands on.
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Half Birthday Calculator
Half birthday date, weekday and countdown.
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Typing Speed Test
Words per minute and accuracy, measured over 15 seconds to 5 minutes.
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Online Notepad
Write a note that is still there when you come back, with no account.
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Pomodoro Timer
A pomodoro timer that keeps time correctly in a background tab.
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Dice Roller
Roll d4 to d100 with modifiers, using genuinely random numbers.
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Coin Flip
Flip a coin online, with a running count of heads and tails.
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Random Picker
Draw names or items at random, with or without repeats.
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Reaction Time Test
Measure visual reaction time, with best and average over several tries.
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Tally Counter
Count things with named counters that survive closing the tab.
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Finance Calculators
Loans, mortgages, interest, savings and investment returns. About finance calculators.
Loan Calculator
Calculate monthly payments and total interest for any fixed-rate loan.
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Compound Interest Calculator
See how an investment grows with compounding and monthly contributions.
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Salary Calculator
Convert a salary between hourly, weekly, monthly and annual figures.
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Mortgage Calculator
Monthly payment, total interest and a year-by-year balance for any mortgage.
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EMI Calculator
EMI, total interest and the full repayment schedule for a loan of any size.
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Simple Interest Calculator
Interest on the original amount only, with the formula shown step by step.
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Savings Goal Calculator
How long a goal takes, or how much a month it needs, with interest included.
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ROI Calculator
Net gain, ROI and the annualised figure from what you put in and got out.
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CAGR Calculator
The smoothed yearly growth rate between a starting and an ending value.
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Inflation Calculator
What a sum is worth after inflation, and what you would need to match it.
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Car Loan Calculator
Monthly payment, total interest and the real cost of a car loan.
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Credit Card Payoff Calculator
Months to clear a credit card balance and the interest it costs.
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Debt Payoff Calculator
Order your debts for payoff and compare snowball with avalanche.
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Amortization Calculator
Month-by-month interest, capital and balance for any loan.
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APR Calculator
Turn a rate plus fees into a comparable APR.
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Down Payment Calculator
Deposit, loan left and LTV, with the monthly payment.
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Refinance Calculator
Monthly saving, lifetime saving and the break-even month on a refinance.
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Home Affordability Calculator
The house price your income, debts and deposit support.
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Rent vs Buy Calculator
Renting against buying over however long you stay.
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Future Value Calculator
What money grows to, with contributions and inflation.
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Present Value Calculator
Discount future money back to its value today.
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NPV Calculator
NPV, IRR and payback period from any cash flow list.
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IRR Calculator
Internal rate of return for any series of cash flows.
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Annuity Calculator
Income from a pot, or the pot needed for an income.
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Retirement Calculator
Project a retirement pot and the income it would pay.
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SIP Calculator
Monthly SIP growth, with a yearly step-up option.
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Lumpsum Calculator
Growth of a single lump sum investment.
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FD Calculator
Fixed deposit maturity value, interest and effective rate.
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RD Calculator
Recurring deposit maturity value and interest earned.
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PPF Calculator
PPF maturity value with yearly interest credits.
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Net Worth Calculator
Net worth from your assets and liabilities.
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Payback Period Calculator
Payback period from even or uneven cash flows.
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Depreciation Calculator
Depreciation schedules and book value by four methods.
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Dividend Yield Calculator
Dividend yield, income and yield on cost.
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Stock Average Calculator
Average cost per share, break-even and profit or loss.
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Crypto Profit Calculator
Crypto profit and loss with fees and break-even price.
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Zakat Calculator
Zakat at 2.5% of net zakatable wealth, with nisab.
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Student Loan Calculator
Student loan repayments, interest and grace period effect.
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Business Calculators
Pricing, margin, tax, payroll and advertising spend. About business calculators.
Discount Calculator
Enter a price and a discount to get the saving, the final price and tax.
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VAT and Sales Tax Calculator
Add or remove VAT, GST or sales tax at any rate, in both directions.
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Profit Margin Calculator
Calculate profit margin and markup, or find the price for a target margin.
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Break-Even Calculator
Break-even units and revenue from fixed costs, variable costs and price.
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Markup Calculator
Markup, margin and selling price, and the difference between the first two.
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CPM Calculator
CPM from spend and impressions, or either from a CPM.
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CPC Calculator
Cost per click, clicks per budget and cost per conversion.
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CPA Calculator
Cost per acquisition with the break-even figure.
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ROAS Calculator
Return on ad spend with profit and break-even ROAS.
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Conversion Rate Calculator
Conversion rate with uplift and revenue impact.
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Customer Lifetime Value Calculator
Customer lifetime value with the LTV to CAC ratio.
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Churn Rate Calculator
Customer and revenue churn with retention and lifetime.
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Commission Calculator
Flat or tiered sales commission with base pay.
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Overtime Calculator
Overtime pay at time and a half, double time or any rate.
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Hourly to Salary Calculator
Hourly rate to annual salary and back again.
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Price Per Unit Calculator
Compare pack sizes to find the real unit price.
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GST Calculator
Add or remove GST at any rate, with the tax split.
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Invoice Total Calculator
Invoice subtotal, discount, tax and total from line items.
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Profit Calculator
Gross, operating and net profit with margins.
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Math Calculators
Percentages, fractions, roots, powers, sequences and equations. About math calculators.
Percentage Calculator
Three calculators: percent of a number, what percent one number is, and change.
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Average Calculator
Paste any list of numbers and get the full set of summary statistics.
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Scientific Calculator
Evaluate full expressions with trigonometry, logarithms, powers and constants.
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Fraction Calculator
Calculate with fractions and mixed numbers, simplified and explained.
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Ratio Calculator
Simplify a ratio, solve for a missing term, or scale to a new total.
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Quadratic Equation Solver
Roots, discriminant, vertex and the full working for ax2 + bx + c = 0.
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Roman Numeral Converter
Numbers to Roman numerals and back, with the rules explained.
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Speed Distance Time Calculator
Any one of the three from the other two, in metric or imperial units.
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Percentage Change Calculator
Percentage increase or decrease between two values.
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Percentage Difference Calculator
Percentage difference between two values, using their average.
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Percent Error Calculator
Percent error between a measured and an accepted value.
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Square Root Calculator
Square root, simplified radical form, square and cube root.
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Cube Root Calculator
Cube root and any nth root, negatives included.
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Exponent Calculator
Powers, including negative and fractional exponents.
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Logarithm Calculator
Logarithms to any base, plus ln, log10 and antilog.
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Factorial Calculator
n! with the expansion, digit count and related counts.
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GCF and LCM Calculator
GCF and LCM of several numbers, with factorisations.
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Prime Number Checker
Check whether a number is prime and find its factors.
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Prime Factorization Calculator
Prime factors with exponents, the tree and every divisor.
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Decimal to Fraction Calculator
Decimals to fractions and mixed numbers, simplified.
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Significant Figures Calculator
Count sig figs and round to a given precision.
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Scientific Notation Converter
Scientific, engineering and plain notation, both ways.
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Rounding Calculator
Round to a place or multiple, with every rule compared.
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Proportion Calculator
Cross-multiply to find the missing term of a proportion.
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Modulo Calculator
Remainder and quotient, with negative numbers handled.
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Statistics Calculators
Averages, spread, z-scores, confidence intervals and sample sizes. About statistics calculators.
Standard Deviation Calculator
Standard deviation, variance, mean, median and quartiles from any list.
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Permutation and Combination Calculator
nPr and nCr with the factorials shown, and the rule for choosing between them.
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Probability Calculator
Probability of events happening together, either one, or not at all.
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Mean Median Mode Calculator
Mean, median, mode, range and quartiles of a data set.
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Variance Calculator
Sample and population variance with the full working.
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Z-Score Calculator
Z-score with percentile and tail probabilities.
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Confidence Interval Calculator
Confidence intervals for a mean or a proportion.
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Margin of Error Calculator
Margin of error for a survey or poll result.
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Sample Size Calculator
Required sample size for a margin of error.
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Correlation Coefficient Calculator
Pearson correlation coefficient and r squared.
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Linear Regression Calculator
Least squares line with slope, intercept and r squared.
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Binomial Probability Calculator
Binomial probabilities, exact and cumulative.
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Percentile Calculator
Percentiles, quartiles and the percentile rank of a value.
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Geometry Calculators
Area, perimeter, volume, surface area and triangle solving. About geometry calculators.
Area Calculator
Area and perimeter for ten shapes, with the formula and the working.
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Triangle Calculator
Triangle sides, angles, area and type from any three facts.
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Right Triangle Calculator
Right triangle sides and angles by Pythagoras.
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Circle Calculator
Radius, diameter, circumference and area of a circle.
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Regular Polygon Calculator
Regular polygon area, angles, apothem and diagonals.
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Perimeter Calculator
Perimeter of rectangles, circles, triangles and polygons.
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Volume Calculator
Volume of boxes, cylinders, spheres, cones and tanks.
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Surface Area Calculator
Surface area of boxes, cylinders, spheres and cones.
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Sphere Calculator
Sphere volume, surface area, radius and diameter.
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Cylinder Volume Calculator
Cylinder volume in litres, with partial fill.
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Cone Volume Calculator
Cone volume, surface area and slant height.
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Distance Formula Calculator
Distance between two points in 2D or 3D.
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Midpoint Calculator
Midpoint, missing endpoint and any division ratio.
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Slope Calculator
Slope between two points, with angle and line equation.
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Trigonometry Calculator
Sin, cos, tan and the inverse functions.
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Angle Converter
Convert angles between every common unit.
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Health Calculators
BMI, BMR, calories, body fat, heart rate and pace. About health calculators.
BMI Calculator
Work out BMI from height and weight, in metric or imperial units.
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BMR Calculator
Basal metabolic rate by three published equations.
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Calorie Calculator
Daily calorie needs from BMR and activity level.
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Body Fat Calculator
Body fat percentage by the US Navy tape method.
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Ideal Weight Calculator
Ideal weight by four formulas, plus the healthy BMI range.
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Lean Body Mass Calculator
Lean body mass by three published formulas.
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Waist to Hip Ratio Calculator
Waist to hip ratio with the WHO risk categories.
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Macro Calculator
Split daily calories into protein, carbs and fat.
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Protein Intake Calculator
Daily protein target with the per-meal split.
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Water Intake Calculator
Daily water intake in litres and glasses.
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Calories Burned Calculator
Calories burned by activity, duration and weight.
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Heart Rate Zone Calculator
Heart rate training zones by age or measured max.
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One Rep Max Calculator
One rep max estimate with the percentage table.
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Running Pace Calculator
Running pace, finish time and race splits.
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Body Surface Area Calculator
Body surface area in square metres, five formulas.
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Sleep Calculator
Bedtimes and wake times built around sleep cycles.
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Due Date Calculator
Pregnancy due date from a last period or conception date.
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Ovulation Calculator
Fertile window, ovulation date and next period.
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Steps to Calories Calculator
Steps converted to calories burned and distance.
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Date & Time Calculators
Days between dates, working days, durations and timesheets. About date & time calculators.
Age Calculator
Enter a date of birth to get an exact age plus total months, weeks and days.
Date & Time Calculators
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Date Calculator
Add days, weeks or months to a date, or count the gap between two dates.
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Time Duration Calculator
The gap between two times, or a duration added to or taken from a time.
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Work Hours Calculator
Daily and weekly hours with breaks deducted, plus overtime and gross pay.
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Business Days Calculator
Count working days between dates, or add them to one.
Date & Time Calculators
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Add or Subtract Days Calculator
Add or subtract days, weeks, months or years from a date.
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Days Until Calculator
Countdown to any date in days, weeks and working days.
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Age Difference Calculator
Age gap between two people in years, months and days.
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Week Number Calculator
ISO week number for any date, or its date range.
Date & Time Calculators
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Day of the Week Calculator
The weekday for any date, past or future.
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Leap Year Calculator
Check any year for a leap year, with the rule explained.
Date & Time Calculators
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Hours Calculator
Add or total hours and minutes, with decimal conversion.
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Military Time Converter
12-hour and 24-hour clock conversion both ways.
Date & Time Calculators
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Unit Converters
Length, weight, temperature, volume, speed, energy and data. About unit converters.
Unit Converter
Convert between metric and imperial units across seven categories.
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Length Converter
Convert any length between metric and imperial units.
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Weight Converter
Convert weight between metric and imperial units.
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Volume Converter
Convert volume between metric, US and imperial units.
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Area Converter
Convert area between metric, imperial and land units.
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Speed Converter
Convert speed between every common unit.
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Data Storage Converter
Convert data sizes, decimal and binary units both.
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Temperature Converter
Convert temperature between all five scales.
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Pressure Converter
Convert pressure between every common unit.
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Energy Converter
Convert energy between every common unit.
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Power Converter
Convert power between watts, kW, hp and BTU/h.
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Density Converter
Convert density between metric and imperial units.
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Frequency Converter
Convert frequency between hertz, RPM and radians.
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Cooking Measurement Converter
Convert cups and spoons to grams for each ingredient.
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Fuel Economy Converter
Convert fuel economy between MPG and L/100km.
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Height Converter
Height in cm, feet and inches, converted both ways.
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Oven Temperature Converter
Oven temperatures across C, F, gas mark and fan.
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Shoe Size Converter
Shoe sizes across UK, US, EU and cm.
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Home & Energy Calculators
Tiles, paint, concrete, running costs and energy bills. About home & energy calculators.
Tip Calculator
Calculate a tip, the total, and what each person owes when splitting.
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Fuel Cost Calculator
Calculate trip fuel cost from distance, efficiency and the price per unit.
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Electricity Bill Calculator
The running cost of any appliance by the hour, day, month and year.
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Split Bill Calculator
Even or uneven splits with tip and tax, and who owes exactly what.
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Tile Calculator
How many tiles and boxes a room needs.
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Paint Calculator
Paint needed for walls and ceiling, by coats.
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Concrete Calculator
Concrete volume in cubic metres and bags.
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Flooring Calculator
Packs of laminate or wood flooring and underlay.
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Wallpaper Calculator
Wallpaper rolls counted properly, by drops.
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Mulch and Soil Calculator
Mulch and topsoil in cubic metres, bags and bulk bags.
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Gravel Calculator
Gravel and aggregate in tonnes and bulk bags.
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Fence Calculator
Fence panels, posts and concrete for any run.
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BTU Calculator
BTU needed to heat or cool a room.
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Roof Pitch Calculator
Roof pitch, rafter length and roof area.
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Solar Panel Calculator
Solar system size, output and payback period.
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Trip Cost Calculator
Journey cost in fuel and tolls, split per person.
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Serving Size Calculator
Scale a recipe to any number of servings.
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Education Calculators
Grades, GPA, weighted averages and attendance. About education calculators.
GPA Calculator
Calculate weighted GPA from your grades and credit hours.
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Final Grade Calculator
The final exam mark needed to reach a target grade.
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Test Grade Calculator
Marks to a percentage and letter grade, with boundaries.
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Weighted Average Calculator
Weighted mean of any list, with each contribution shown.
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Semester Grade Calculator
Overall course grade from weighted assignments.
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CGPA to Percentage Calculator
CGPA and percentage conversion, both directions.
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Attendance Calculator
Attendance percentage, plus classes you can still miss.
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Reading Time Calculator
Reading and speaking time from words or pasted text.
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Tech Calculators
Subnets, bytes, bitrates, pixels and screen maths. About tech calculators.
Subnet Calculator
IPv4 subnet details from an address and prefix.
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Byte Converter
Bytes to KB, MB, GB and the KiB/MiB/GiB family.
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Download Time Calculator
Transfer time from a file size and a line speed.
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Binary Calculator
Binary arithmetic with decimal, hex and octal output.
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Hex Calculator
Hex arithmetic with decimal, binary and octal output.
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Bitwise Calculator
Bitwise operations with the bit patterns displayed.
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PX to REM Converter
Pixels to rem, em and points at any root size.
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Aspect Ratio Calculator
Resize to a ratio without distorting the image.
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PPI Calculator
Screen PPI, dot pitch and retina distance.
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Video Bitrate Calculator
Video file size and bitrate, either direction.
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Password Entropy Calculator
Password entropy in bits and time to brute force.
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Text Tools
Count, clean, convert and reorder any block of text. About text tools.
Word Counter
Live word, character, sentence and paragraph counts with a reading-time estimate.
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Character Counter
Character, word, line and paragraph counts that update as you type.
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Case Converter
Convert any text to UPPERCASE, lowercase, Title Case, Sentence case and more.
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Text to Slug Converter
Convert a headline into a lowercase, hyphenated URL slug ready for publishing.
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Remove Duplicate Lines
Deduplicate any list of lines, with case-sensitive and empty-line options.
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Text Sorter
Order any list A-Z, Z-A, by number, by line length, or simply reverse it.
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Text Reverser
Flip text backwards at character, word or line level in one click.
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Text Cleaner
Tidy messy pasted text: extra spaces, empty lines, breaks and special characters.
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Find and Replace Text
Replace text everywhere at once, with case options and regex support.
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Text Diff Checker
Spot every added, removed and unchanged line between two versions.
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Word Frequency Counter
Rank every word by how often it appears, with counts and percentages.
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Lorem Ipsum Generator
Create as much placeholder copy as a layout needs, in one click.
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Add Prefix and Suffix to Lines
Add text to the start or end of every line, with optional numbering.
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Developer Tools
Format JSON, inspect URLs and work with timestamps. About developer tools.
JSON Formatter
Pretty-print and validate JSON, with the exact line and column of any error.
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JSON Minifier
Strip whitespace from JSON and compare original and minified sizes.
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URL Parser
Split a URL into every component, including a table of query parameters.
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Timestamp Converter
Translate between Unix time and human-readable dates in both directions.
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Unix Timestamp Generator
The current epoch time in seconds and milliseconds, updating every second.
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Hash Generator
Generate cryptographic hashes of text, computed in your browser.
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UUID Generator
Generate cryptographically random UUIDs in bulk, with format options.
Developer Tools
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Regex Tester
Build and test regular expressions live, with highlighted matches and groups.
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JWT Decoder
Decode a JWT to see its header, claims and expiry, without sending it anywhere.
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CSV to JSON Converter
Turn spreadsheet data into JSON, or JSON records back into CSV rows.
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Live HTML Editor
A three-pane editor with a live preview that updates as you type.
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CSV Viewer
View CSV data as a proper table you can sort, search and page through.
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CSV Formatter
Fix delimiters, trim fields, remove empty rows and re-quote CSV properly.
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YAML to JSON Converter
Translate between YAML and JSON, with clear errors on invalid indentation.
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MIME Type Lookup
Look up MIME types by extension, or find which extensions use a type.
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Cron Expression Generator
Generate cron expressions from a schedule, and explain ones you already have.
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User Agent Parser
Parse any user agent string, or inspect your own browser's.
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HTTP Status Code Reference
A searchable reference for every HTTP status code, with practical guidance.
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Security Headers Generator
Build security header configuration for Apache, nginx, Netlify or Vercel.
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CSP Generator
Generate a Content Security Policy header directive by directive, with explanations.
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MD5 Generator
Produce the standard 32-character MD5 digest of any string in your browser.
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SHA-256 Generator
Produce the 64-character SHA-256 digest of any string using your browser's own crypto.
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JSON to CSV Converter
Convert an array of JSON objects into CSV, with nested fields flattened.
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JSON to XML Converter
Turn JSON into indented, well-formed XML with proper escaping.
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XML to JSON Converter
Turn an XML document into JSON, with attributes and text content preserved.
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Image Tools
Compress and resize pictures without uploading them. About image tools.
Image Compressor
Compress and resize JPEG, PNG and WebP images privately in your browser.
Image Tools
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Image to Base64 Converter
Convert an image to a Base64 data URI for CSS, HTML or JSON.
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Image Resizer
Resize images by pixels or percentage, with aspect ratio locking.
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Image Cropper
Crop images by dragging a selection, with fixed ratio presets.
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Image Format Converter
Convert images between JPG, PNG and WebP with quality control.
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Favicon Generator
Generate favicon PNGs, an .ico file and the HTML to link them.
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SVG to PNG Converter
Convert SVG to PNG at a chosen size, with transparency preserved.
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EXIF Data Viewer
Read camera settings, dates and GPS data stored inside a JPEG.
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JPG to PNG Converter
Turn JPG files into PNG without uploading them anywhere.
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PNG to JPG Converter
Turn PNG files into JPG without uploading them anywhere.
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JPG to WebP Converter
Turn JPG files into WebP without uploading them anywhere.
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PNG to WebP Converter
Turn PNG files into WebP without uploading them anywhere.
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WebP to JPG Converter
Turn WebP files into JPG without uploading them anywhere.
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WebP to PNG Converter
Turn WebP files into PNG without uploading them anywhere.
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Color Tools
Pick colours and convert between HEX, RGB and HSL. About color tools.
Color Picker
Choose any colour and copy it in HEX, RGB or HSL, with tints and shades.
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HEX to RGB Converter
Turn any HEX code into RGB and HSL values, with alpha support.
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RGB to HEX Converter
Enter R, G and B values and get the matching HEX and HSL colour.
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Color Contrast Checker
Measure contrast between two colours and see which accessibility levels pass.
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CSS Gradient Generator
Design linear and radial gradients with live preview and copyable CSS.
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Color Palette Generator
Generate complementary, triadic and analogous palettes from any colour.
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Encoding & Conversion
Base64, URL and HTML encoding in both directions. About encoding & conversion.
Base64 Encoder
Encode any text, including emoji and accents, to a Base64 string.
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Base64 Decoder
Decode Base64 back to text, with friendly errors for malformed input.
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URL Encoder
Escape spaces, symbols and non-ASCII characters for use in URLs.
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URL Decoder
Decode %20 and other percent escapes back into normal characters.
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HTML Encoder & Decoder
Escape angle brackets and quotes to HTML entities, or decode them back.
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Number Base Converter
Convert a number between binary, octal, decimal, hex and custom bases.
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Text to Binary Converter
Convert text to binary or hex byte values, and convert them back to text.
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Morse Code Translator
Convert text to Morse code and back, with audio playback of the result.
Encoding & Conversion
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Utility Tools
Passwords, QR codes and other everyday helpers. About utility tools.
Password Generator
Generate strong random passwords with your own length and character rules.
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QR Code Generator
Generate a QR code for any link or text and download it as a PNG or SVG.
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Random Number Generator
Pick random numbers in a range, with unique-only and sorting options.
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Stopwatch and Timer
Time anything with a lap stopwatch, or count down with an audible alarm.
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Number to Words Converter
Spell out numbers in words, with a cheque-writing currency format.
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Password Strength Checker
Check password strength by entropy and pattern, entirely in your browser.
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Time Zone Converter
Convert times across time zones, with daylight saving handled correctly.
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World Clock
A live clock showing the current time in as many cities as you choose.
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Random String Generator
Create random strings, tokens and IDs using cryptographic randomness.
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SEO Tools
Links, meta tags, schema markup, redirects and SERP previews. About seo tools.
HTML Link Generator
Generate HTML, Markdown and BBCode links with nofollow, sponsored and target options.
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Bulk Hyperlink Generator
Convert a whole list of URLs and anchor texts into HTML or Markdown links.
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Anchor Text Generator
Generate exact, partial, branded and generic anchor variations with a distribution.
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URL Extractor
Extract all URLs from text or HTML, with anchor text and filtering options.
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Domain Extractor
Strip URLs down to domains or root domains, with counts and deduplication.
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Duplicate URL Remover
Remove repeated URLs, treating trailing slashes and tracking parameters as the same.
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URL Cleaner
Remove utm and click-tracking parameters, fragments and stray characters from URLs.
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UTM Builder
Create UTM-tagged links for campaigns, with validation and a consistent format.
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SEO Title Generator
Build title tags from patterns and check their pixel width against search results.
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Meta Description Generator
Build meta descriptions from patterns and check their width against search snippets.
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SERP Preview Tool
Preview the title, URL and description as a search result, on desktop and mobile.
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Keyword Density Checker
Check single word, two-word and three-word phrase density in any text.
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Heading Tag Generator
Generate heading markup from an outline, and check an existing page for structure problems.
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Image Alt Tag Generator
Generate img tags with alt, width and loading attributes, and audit alt text quality.
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Open Graph Generator
Generate Open Graph meta tags with a live preview of the shared link card.
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Twitter Card Generator
Generate Twitter Card meta tags with summary and large image card previews.
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Canonical Tag Generator
Generate canonical link tags, with hreflang alternates and common-mistake checks.
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Robots.txt Generator
Generate robots.txt with per-crawler rules, sitemap lines and common presets.
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XML Sitemap Generator
Build sitemap.xml from your URL list, with lastmod, changefreq and priority.
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301 Redirect Generator
Generate redirect rules for Apache, nginx, Netlify, Vercel and Cloudflare from a mapping.
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.htaccess Generator
Generate .htaccess rules for redirects, caching, compression and security headers.
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Schema Markup Generator
Generate Article, Product, LocalBusiness, Organization, Person and Event schema.
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FAQ Schema Generator
Generate FAQPage JSON-LD from your questions and answers, correctly escaped.
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Breadcrumb Schema Generator
Build BreadcrumbList JSON-LD plus accessible breadcrumb HTML from a path.
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SEO Audit Tool
Check title, description, headings, canonical, robots, Open Graph, schema and images in one pass.
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Keyword Extractor
Extract single keywords and multi-word phrases ranked by how much they carry the text.
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Anchor Text Extractor
Extract anchor text, destinations and rel attributes from any HTML, as a table or CSV.
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Internal Link Checker
Find internal links, their anchor text and the faults that stop them working.
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External Link Checker
Find external links, their rel attributes and the ones that need attention.
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Image Alt Checker
Check every image on a page for missing, empty or unhelpful alt text.
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URL Sorter
Sort URLs alphabetically, by domain, by path depth or by length.
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Domain Sorter
Sort domains alphabetically, by TLD, by length or by how often they appear.
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TLD Filter
Filter a list of domains or URLs by top-level domain, keeping or excluding what you choose.
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Duplicate Domain Remover
Remove duplicate domains from a list, keeping one URL for each.
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Code Formatters
Tidy or shrink HTML, CSS, JavaScript, XML, SQL and Markdown. About code formatters.
HTML Formatter
Pretty-print HTML with consistent indentation, or collapse it back down.
Code Formatters
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CSS Formatter
Format CSS with consistent indentation, spacing and one declaration per line.
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JavaScript Formatter
Format JavaScript with consistent indentation, spacing and statement breaks.
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HTML Minifier
Shrink HTML by removing comments and collapsing whitespace, safely.
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CSS Minifier
Minify CSS by removing comments, whitespace and redundant characters.
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JavaScript Minifier
Shrink JavaScript by removing comments and whitespace, without renaming anything.
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XML Formatter
Pretty-print XML with proper indentation, and catch malformed documents.
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SQL Formatter
Format SQL with keywords, clauses and joins on their own lines.
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Markdown to HTML
Turn Markdown into HTML with a live preview and escaped output.
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HTML to Markdown
Convert HTML into Markdown, keeping headings, lists, links and tables.
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No tool matches that search. Try a broader word such as text, json, colour or calculator, or clear the filter to see all 330 tools.
Recently added
The newest additions to the collection.
Typing Speed Test
Words per minute and accuracy, measured over 15 seconds to 5 minutes.
Everyday Tools
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Online Notepad
Write a note that is still there when you come back, with no account.
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Pomodoro Timer
A pomodoro timer that keeps time correctly in a background tab.
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Dice Roller
Roll d4 to d100 with modifiers, using genuinely random numbers.
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Coin Flip
Flip a coin online, with a running count of heads and tails.
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Random Picker
Draw names or items at random, with or without repeats.
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All 20 categories
Each category page explains what its tools do and which one to pick.
Everyday Tools
Timers, counters, pickers and the small tools you reach for daily.
14 toolsFinance Calculators
Loans, mortgages, interest, savings and investment returns.
38 toolsBusiness Calculators
Pricing, margin, tax, payroll and advertising spend.
19 toolsMath Calculators
Percentages, fractions, roots, powers, sequences and equations.
25 toolsStatistics Calculators
Averages, spread, z-scores, confidence intervals and sample sizes.
13 toolsGeometry Calculators
Area, perimeter, volume, surface area and triangle solving.
16 toolsHealth Calculators
BMI, BMR, calories, body fat, heart rate and pace.
19 toolsDate & Time Calculators
Days between dates, working days, durations and timesheets.
13 toolsUnit Converters
Length, weight, temperature, volume, speed, energy and data.
18 toolsHome & Energy Calculators
Tiles, paint, concrete, running costs and energy bills.
17 toolsEducation Calculators
Grades, GPA, weighted averages and attendance.
8 toolsTech Calculators
Subnets, bytes, bitrates, pixels and screen maths.
11 toolsText Tools
Count, clean, convert and reorder any block of text.
13 toolsDeveloper Tools
Format JSON, inspect URLs and work with timestamps.
25 toolsImage Tools
Compress and resize pictures without uploading them.
14 toolsColor Tools
Pick colours and convert between HEX, RGB and HSL.
6 toolsEncoding & Conversion
Base64, URL and HTML encoding in both directions.
8 toolsUtility Tools
Passwords, QR codes and other everyday helpers.
9 toolsSEO Tools
Links, meta tags, schema markup, redirects and SERP previews.
34 toolsCode Formatters
Tidy or shrink HTML, CSS, JavaScript, XML, SQL and Markdown.
10 tools