JWT Decoder
🔒 All decoding happens locally in your browser
JWT Token Input
0 charactersDecoded JWT
No JWT token
Paste a JWT token in the input field to decode and analyze its contents.
About JWT Decoder
Our free online JWT Decoder helps you decode and inspect JSON Web Tokens. View the header, payload, and signature of any JWT without the need for the secret key. Essential for debugging authentication issues and understanding JWT structure.
Key Features
Complete Decoding
View header, payload, and signature sections separately.
Claim Analysis
See all claims with human-readable timestamps.
Expiration Check
Instantly see if a token is expired.
100% Client-side
All decoding happens in your browser - your tokens stay private.
Copy Support
Copy decoded sections for debugging.
Error Detection
Invalid JWTs are identified with helpful error messages.
How to Use
- 1Paste your JWT token in the input field.
- 2The decoder automatically parses the header, payload, and signature.
- 3Review the decoded claims including expiration time.
- 4Copy any section for use in documentation or debugging.
Pro Tips
- 💡JWTs have three parts separated by dots: header.payload.signature
- 💡The payload contains claims like 'exp' (expiration) and 'iat' (issued at).
- 💡Never share JWTs publicly - they may contain sensitive information.
- 💡This tool decodes but doesn't verify signatures (requires the secret).