JWT.io Alternative — Full Encoder & Decoder
Like jwt.io but with live encoding for all algorithms (not just HS256), PEM/JWK key input, and a cleaner interface. Decode, encode, and verify JWTs entirely in your browser. Nothing is sent to any server.
Open JWT ToolNo UploadFiles stay on your device
No SignupNo account required
Runs in BrowserWorks offline too
Free ForeverNo limits, no watermarks
What you get
- ✓Decode any JWT instantly
- ✓Encode with 12 algorithms (HS, RS, ES, PS)
- ✓Live signing as you type
- ✓PEM and JWK key support
- ✓Signature verification
- ✓Color-coded token display
Why switch from JWT.io?
JWT.ioFree Tooling
✗Encoder supports limited algorithms client-side
✓Live signing with all 12 standard algorithms
✗Auth0-branded, includes marketing
✓Clean tool, no branding or marketing
✗Single-purpose tool
✓Part of a 20+ tool suite
✗No offline support
✓Works offline (PWA)
Frequently asked questions
How is this better than jwt.io?
Our encoder supports live signing with all 12 standard algorithms including RSA, ECDSA, and RSA-PSS — not just HMAC. We also support PEM and JWK key formats for both encoding and verification.
Free · No account · No upload · Works offline