About DevToolbox

DevToolbox is a collection of small, fast developer utilities — JSON and XML formatters, structural diff tools, a time-zone-aware epoch converter, Base64 and URL encoders, a JWT decoder, and UUID and hash generators.

Your data stays with you

Every tool runs as JavaScript in your browser. Text you paste is parsed, formatted, compared or hashed locally and is never sent to a server, logged, or stored. You can verify this in your browser's network panel.

How it's funded

The site is free. It is supported by unobtrusive display advertising. Ads, when present, are kept out of the working area of each tool and never interact with the content you paste.

Feedback

Missing a tool or spotted a bug? Suggestions are welcome — check the tools list to see what already exists.