JWT Decoder

Decode JWTs instantly in your browser. No server-side processing for your security.

Your token is decoded locally in your browser and never sent to any server.

JWT Token

Header

{}

Payload

{}

Signature

HMACSHA256( base64UrlEncode(header) + "." + base64UrlEncode(payload), your-256-bit-secret )

JWT Decoder

Free online JWT Decoder. Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, and signature details without sending data to a server.

📖How to Use

1Paste JWT

Paste your JWT string into the input area.

2Auto Decode

The tool will automatically decode the token.

3View Details

View the Header, Payload, and Signature sections.

4Check Claims

Check the expiration time and other claims.

💡Common Use Cases

Debugging authentication issues in web applications.

Inspecting token claims (roles, permissions, expiration).

Verifying the structure of a JWT.

❓Frequently Asked Questions

Is it safe to paste my JWT here?

Yes, decoding is done entirely in your browser. Your tokens are never sent to our servers.

Can I verify the signature?

Currently, we only support decoding. Signature verification requires your secret key, which you should not share.

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JWT Decoder