Developer tools
Seven small utilities for code and data. Safe to paste API tokens, JWTs and customer payloads into, because nothing leaves this tab.
- JSON formatter Validates JSON, then pretty-prints or minifies it. Errors say where the problem is. Runs in browser
- Base64 Encodes and decodes Base64 text, including the URL-safe variant and unicode. Runs in browser
- URL encoder Percent-encodes text for use in URLs and query strings, and decodes it back. Runs in browser
- JWT decoder Shows a token’s header, payload and expiry time. Does not verify the signature. Runs in browser
- Hash generator Computes the SHA-256, SHA-512 or SHA-1 hex digest of any text. Runs in browser
- UUID generator Generates up to 1,000 random version-4 UUIDs at once, ready to copy. Runs in browser
- RGB ↔ HEX Converts RGB values to hex colour codes and back, one per line, with optional transparency. Runs in browser