About StringMash

StringMash is a collection of over 100 converters and tools for text: old alphabets like runes, Ogham and Morse, classic ciphers from Caesar to Playfair, fancy text for social media, developer encodings like Base64 and JWT, and maths tools that show their working. Each one has a page of its own explaining how the conversion works, usually with a printable chart.

It's an independent site, built and looked after by one person, and it's free to use. There are no accounts and nothing to sign up for.

Every conversion runs in your browser. Nothing you type is sent to a server, saved or logged, and that's tested: before changes go live, a test types a marker into every converter on the site and confirms it never appears in any network request.

Where a tool can show its working, it does. Long division is drawn out the way it's written on paper, the subnet calculator shows the binary, and the sorting pages animate every comparison. The aim is that you can follow how an answer was reached, not just copy it.

The history and reference material on each page is checked against a source before it's published, and the sources are listed at the bottom of the page. Technical tools follow the standards that define them: the RFCs for UUIDs, JWTs and IP addressing, IEC 60062 for resistor colours, and ITU-R M.1677-1 for Morse. Where something can't be confirmed, it's left out rather than guessed at.

Most charts and tables are generated from the same code the converters use, so they can't disagree with the converter on the same page.

Nothing on the site flashes more than three times a second, including the Morse light and the sorting animations. The converters work with a keyboard, the charts print cleanly, and the pixel art is decoration that screen readers skip.

Corrections, suggestions for new converters and questions about embedding a tool on your own site are all welcome at hello@stringmash.com. If you spot a mistake, it gets fixed.