Every tool you need, in one place
Format, convert, compare, and calculate with free browser tools. All 100% easy to use — your data stays on your device.
Base64
Encode or decode Base64 text
JWT decoder
Decode JWT header and payload in the browser
URL encode / decode
Percent-encoding helpers
Hash generator
MD5 / SHA helpers in the browser
YAML validator
Check YAML syntax, highlight the bad line, and suggest a fix
YAML formatter
Format, minify, and convert YAML in the browser
About Free Tool Mate
Free Tool Mate brings together free online developer tools for JSON, XML, SQL, YAML, text, images, and everyday calculations in one fast workspace. Format and validate JSON, beautify SQL queries, convert XML to JSON, decode Base64 and JWT tokens, generate UUIDs, resize images, and much more. Every tool runs entirely in your browser, so your data is never uploaded to a server. No sign-up, no installs, and no limits.