JWT Encoder
FreeCreate and sign JWT tokens with custom claims
Signed in your browser with WebCrypto (HMAC). The secret never leaves your device. Verify the token at jwt.io.
About JWT Encoder
Building and debugging token-based auth often means you need a valid JWT on demand, with the exact claims and signature your API expects. This JWT Encoder lets you assemble a token from a custom payload, set standard claims like issuer, subject, and expiry, choose an algorithm, and sign it with your secret, all without spinning up backend code.
Fill in the header and claims, provide your signing key, and ToolHub by Codaiman returns a ready-to-use signed token. Because it is free and runs in your browser, you can craft test tokens for protected endpoints, reproduce edge cases, or check how your service validates a signature, instantly and without signup. Just remember a JWT payload is only encoded, not encrypted, so never put secrets inside the claims.
Common uses
- Creating a signed token to test a protected API endpoint
- Reproducing an auth bug with a specific set of claims
- Generating tokens with custom expiry to test session handling
- Verifying your backend accepts the algorithm and signature you use
- Producing sample tokens for documentation or integration tests
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- Industry-standard algorithms
- No data retention
- OWASP-aligned checks
FAQ
Is the token payload encrypted?
No. JWT claims are Base64Url encoded and readable by anyone with the token. The signature only proves the token was not altered, so never store passwords or secrets in the payload.
Which algorithm should I sign with?
HMAC algorithms like HS256 use a shared secret and are simple for testing. RS256 and similar use a private key and are common when many services only need to verify, not sign.
Can I use these tokens in production?
They are intended for testing and learning. Generate production tokens server-side with secrets that never leave your environment.
Can I use JWT Encoder on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.