Free developer tools
Format and check JSON, encode Base64 and URLs, test regular expressions, decode JWTs, make UUIDs and hashes, convert colours and timestamps. Everything runs locally in your browser, so tokens, keys and data stay private.
- Free, no sign-up
- No watermark
- Nothing sent to a server
- Works on phones
JSON formatter and validator
Beautify, minify and validate
Base64 encode and decode
Text, files and data URIs
URL encoder and decoder
Encode, decode and parse URLs
UUID generator
v4 and v7, in bulk
Colour converter
HEX, RGB, HSL, CMYK, contrast
Regex tester
Live matches and groups
Hash generator
MD5 and SHA for text or files
JWT decoder
Header, claims and expiry
Unix timestamp converter
Epoch to date, any time zone
Questions
Is it safe to paste tokens or data here?
Yes. These tools run entirely in your browser with no server calls, so what you paste is never sent anywhere. Still, treat production secrets with care and rotate any key you have shared.
Do the tools work offline?
Once a page has loaded, the tool keeps working without a connection.
You may also like
