JWT Encoder — Create & Sign JWT Tokens Free
Create and sign JSON Web Tokens (JWT) with HS256, HS384, or HS512 algorithms. Set custom headers and payload claims.
Payload (JSON)
Secret Key
- Header (red) · Payload (purple) · Signature (blue) — three dot-separated Base64url segments
- HS256/HS384/HS512 use HMAC with SHA-2 family algorithms
- Signing happens client-side — your secret never leaves the browser
Frequently Asked Questions about JWT Encoder / Creator
- Is JWT Encoder / Creator completely free to use?
- Yes, JWT Encoder / Creator is 100% free with no sign-up, no watermarks, and no usage limits.
- Is my data private?
- JWT Encoder / Creator runs entirely in your browser — no data is ever sent to our servers. Your content stays on your device.
- Does it work offline?
- Once the page has loaded, JWT Encoder / Creator works fully offline in your browser — no internet connection is required.
- Is the encoding/decoding fully reversible?
- Yes, all encoding operations are fully reversible. Use the same tool or a corresponding decoder to reverse the operation.
- Does JWT Encoder / Creator work on mobile and tablet?
- Yes, JWT Encoder / Creator is fully responsive and works in all modern browsers on desktop, tablet, and mobile.
This tool runs entirely in your browser. No data is ever sent to our servers.