Is it safe to paste my JWT here?

The decoding happens entirely in your browser - tokens are never sent to any server. However, avoid pasting production tokens with sensitive data in shared environments.

Can this verify JWT signatures?

The tool can decode tokens and show signature information, but signature verification requires the secret key, which should never be entered into public tools.

JWT Decoder

Decode and inspect JWT tokens

What is JWT Decoder?

Our JWT Decoder decodes JSON Web Tokens (JWT) and displays their header, payload, and signature information in a readable format. JWTs are commonly used for authentication and secure information exchange. This tool helps developers debug authentication issues, inspect token claims, verify token structure, and understand JWT contents without executing code.

Common Use Cases

Debugging authentication issues
Inspecting API access tokens
Verifying JWT token structure
Reading token claims and expiration
Understanding OAuth tokens
Learning JWT format and structure
Testing token-based authentication

Key Benefits

Instant JWT decoding

Displays header and payload

Shows token expiration

Signature verification support

Pretty-printed JSON output

No server transmission - secure

Free with no registration

How to Use JWT Decoder

Paste your JWT token (usually starting with eyJ), and the tool will immediately decode and display the header, payload, and signature components in readable JSON format.

Frequently Asked Questions

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JWT Decoder

Decode and inspect JWT tokens

This tool decodes JWTs client-side. It does not verify signatures. Never paste tokens containing sensitive data on untrusted sites.

JWT Input

Paste your JWT token (header.payload.signature)

How to Use

1. Paste a JWT token in the input field.

2. Click "Decode JWT" to view header and payload.

3. The signature is shown but not verified.