Every developer task.
One simple place.
JSON, Base64, JWT, regex, UUIDs, and formatters. Local processing, no account required.
Popular Developer Tools
Our most frequently used tools.
JSON format
Pretty-print JSON with validation, entirely in your browser.
Base64 encode
Encode UTF-8 text to Base64 in your browser.
UUID
Generate RFC 4122 version 4 UUIDs using the browser’s secure random API.
Password
Generate a random password in your browser. Nothing is stored or sent.
JS format
Indent JavaScript using braces and semicolons. Runs locally.
JWT
Decode a JWT header and payload locally. Decoding is not verification.
Regex
Test a JavaScript regular expression against sample text without crashing on bad patterns.
Hash
SHA-1, SHA-256, SHA-512 (Web Crypto) and MD5, all local.
Explore Categories
Find exactly what you need by browsing our organized collections.
Fast
Every utility runs instantly in your browser. Nothing to install, and no account required.
Clear
Format, decode, or generate locally. Input stays on this device.
Built to grow
One developer-tool layout, many utilities. New tools slot into the same search and category system.
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