Developer Tools
Developer Tools
Format, encode, decode and generate — the everyday dev toolbox.
JSON Formatter & Validator
Format, validate, beautify and minify JSON online. Instant error messages with line numbers. Runs fully in your browser — nothing is uploaded.
DeveloperBase64 Encode / Decode
Encode text to Base64 or decode Base64 back to text online. UTF-8 safe, instant, and processed locally in your browser.
DeveloperURL Encoder / Decoder
Encode and decode URLs and query string parameters online. Handles reserved characters and spaces. Private, browser-based, instant.
DeveloperJWT Decoder
Decode a JWT to inspect its header and payload claims online. Shows expiry in readable time. Fully client-side — tokens never leave your browser.
DeveloperUUID Generator
Generate cryptographically strong random v4 UUIDs online, one or many at a time. Copy or download instantly. Runs in your browser.
DeveloperHash Generator (SHA)
Generate SHA-256, SHA-1, SHA-384 and SHA-512 hashes of any text online. Uses the browser Web Crypto API — data never leaves your device.