Free, fast and private developer utilities, format, encode and decode data right in your browser. No sign-up.
ToolBrainy's developer tools handle the small encoding and formatting jobs that come up while building and debugging. Format and validate JSON, encode or decode Base64 and URL strings, inspect the payload of a JWT, generate MD5 and SHA hashes, minify HTML, CSS and JavaScript, and test REST API endpoints, and turn any link or text into a QR code. Every tool runs client-side, so your code and tokens never touch a server.
That makes them safe for working with API responses, secrets, and internal data. Each utility is free, keeps working once the page has loaded, and needs no account.