Frequently asked questions

Yes, all 330 of them. There is no paid tier, no trial, no usage limit and no feature held back behind a sign-up. The site is supported by advertising, which is why you will see clearly marked advertisement areas on some pages.

No. There is no registration, no login and no email capture anywhere on the site. Open a tool and start using it.

Yes. Every page is responsive and every tool interface has been built to stay usable on a phone screen, including the ones with tables, which scroll sideways rather than squashing.

Once a tool page has loaded, the browser-based tools keep working even if the connection drops, because all the processing code is already in the page. Loading a different tool page does need the network.

Current versions of Chrome, Edge, Firefox and Safari on desktop and mobile. A few tools rely on newer browser features, such as WebP export in the image compressor, which older browsers may not offer.

Almost every tool processes your input inside your own browser using JavaScript, so the text, numbers or images you work with never reach us. The only things kept on your device are your light or dark theme choice and your advertising consent answer, both in local storage. Generated passwords are never stored.

Yes. Whatever you produce with the tools is yours to use in personal, academic or commercial projects, with no attribution required. The terms of use set this out in full.

Because advertising can use cookies, and in the EEA, the UK and Switzerland you have to be asked before a personalised advert is served. Until you answer, and if you decline, advertising is requested as non-personalised. The Cookie settings link in the footer reopens the message whenever you want.

They apply standard published formulas and are accurate to the inputs you give them. Each calculator names the formula it uses and shows the working, so the result can be checked rather than taken on trust. What they cannot do is account for your circumstances: the loan and interest calculators exclude tax, and the health calculators are general screening figures rather than assessments.

The page says. Every calculator explains its method in the written section below the tool, and where more than one convention exists -- bank-style rounding, flooring a negative remainder, the two ways of converting a CGPA -- both are shown rather than one being picked silently.

Each tool validates what it is given and explains the problem in plain language, usually naming the line or character that caused it. Invalid JSON, a malformed HEX colour and a broken percent escape all produce a specific message rather than a generic failure.

Yes. Calculators that reach a figure through several steps show a breakdown table, and many show the formula with your own numbers substituted into it. Results can be copied as text or downloaded as a CSV where a table makes sense.

Through the contact page. Describe the job you need done rather than the interface you imagine, and say how often you run into it. Tools that solve a common, well-defined problem and can run client-side are the ones most likely to be built.

Please report it. Tell us the tool, the input you used, the result you got and the result you expected. Incorrect output is treated as the highest priority problem on the site.

Yes, and no permission is needed. Link straight to the tool page, for example the word counter at /tools/word-counter/, so people land on the thing they came for.