JWT Decoder
Decode and inspect JWT tokens
How to Use JWT Decoder
- Paste your JWT token
- Click Decode JWT
- View the decoded header, payload, and signature
- Check the token expiry status
Key Features
- Complete Decoding - Decode header, payload, and signature separately
- Expiry Check - Automatically checks if token is expired and shows expiry time
- Formatted Output - View decoded JSON in readable format
Frequently Asked Questions
What is a JWT token?
JWT (JSON Web Token) is an open standard for securely transmitting information between parties as a JSON object. It consists of three parts: header, payload, and signature.
Does this tool verify JWT signatures?
No, this tool only decodes JWT tokens. It does not verify the signature since that requires the secret key. Use this for debugging and inspection only.
Is it safe to decode my JWT here?
Yes, all decoding happens in your browser. Your token never leaves your computer. However, avoid pasting production tokens with sensitive data.
What does the expiry check do?
If the JWT payload contains an exp (expiry) field, the tool will show when the token expires and whether it is currently expired.