Encoding & Conversion

Encoding is how text survives being put somewhere that would otherwise mangle it: a URL, an HTML attribute, an email header, a JSON string. These tools encode and decode in both directions and, when a decode fails, say which character caused it rather than returning nothing.

Base64

The Base64 encoder and decoder handle text and files, including the URL-safe variant that swaps the problem characters. The image to Base64 converter produces a data URI you can paste into CSS or HTML, which is worth doing for tiny icons and a bad idea for photographs.

URLs and HTML

URL encoding and decoding handle percent escapes, with the distinction between encoding a whole URL and encoding a single query parameter made explicit, since getting that wrong is how query strings break. HTML entity encoding escapes the characters that would otherwise be read as markup.

Other representations

Text to binary, number base conversion and the Morse code translator cover the rest, and the number to words converter spells a figure out for cheques and contracts.