JWT Encoder
Create JWT tokens with custom header and payload.
All processing happens in your browser. Your data never leaves your device.
How to Use
- 1Edit the Header and Payload JSON fields.
- 2Select an algorithm (None for unsigned tokens).
- 3Click "Encode JWT" to generate the token.
What is JWT Encoder?
JWT Encoder creates JSON Web Tokens from custom header and payload data. Supports unsigned tokens (alg: none) for development and testing. For production use with signed tokens, use a server-side library.
Key Features
- Custom header and payload
- Supports unsigned tokens (alg: none)
- Auto-sets algorithm in header
- Instant Base64URL encoding
- 100% client-side
JWT Encoder vs Other Tools
| Feature | JWT Encoder | Other Tools |
|---|---|---|
| Client-side processing | Yes | Varies |
| No signup required | Yes | Often required |
| Privacy-first (no data sent) | Yes | Rarely |
| Free & unlimited | Yes | Often limited |
| No ads interruption | Yes | Often no |
FAQ
What is a JWT?
JWT (JSON Web Token) is a compact, URL-safe token format for representing claims between parties. It consists of three parts: header, payload, and signature, each Base64URL encoded.
Is it safe to decode JWT tokens?
Yes, decoding a JWT is safe since it's just Base64URL decoding. However, you should never trust the payload data without verifying the signature. JWT decoding is not the same as JWT validation.