JSON formatting, Base64 and URL encoding, hashing, UUID generation, JWT inspection and regular expression testing — the everyday developer utilities, without the sketchy paste-your-secrets-here website.
The tools
Ordered by how often they are used. Every one is free and runs in your browser.
Background
Every developer has at some point pasted a production token into a random website to decode it. It is a bad habit born of convenience, and the fix is not discipline — it is a tool that visibly does not send anything anywhere.
These utilities run entirely as client-side JavaScript. The JSON you format, the token you inspect and the string you hash are processed in your own tab, with no network request at any point. You can confirm it yourself: open your browser's network panel and watch nothing happen.
We have prioritised the tools developers reach for several times a day — pretty-printing an unreadable API response, checking what a JWT actually contains, encoding a URL parameter correctly, generating identifiers, and testing a regular expression against real sample text with live match highlighting.
What people ask most about developer tools and how ours work.
Keep exploring
Groups of tools that people often need alongside these.
