Free Developer Tools for APIs and Data Processing
Encode/decode Base64, generate UUIDs, hash strings, format JSON, and decode JWT tokens — all in your browser without any uploads.
Best for: software developers, backend engineers, API developers
🔒 Files never uploaded · 🆓 Completely free · 📵 No registration
Step by Step
JSON Formatting
Paste minified JSON from an API response and format it instantly with filecraft.tools/json-formatter.
JWT Decoding
Decode JWT tokens to inspect claims and expiry without exposing them to third-party sites.
Base64 Encoding
Encode file data or API keys to Base64 for embedding in configuration files or JSON.
UUID Generation
Generate RFC 4122 compliant UUIDs for database keys and API identifiers.
Why FileCraft?
Frequently Asked Questions
Is it safe to decode JWT tokens in an online tool?
FileCraft processes everything locally — your JWT never leaves your browser. This is safer than most "online JWT decoders" that send your token to a server.