Free Online JWT Security Inspector
Inspect JWT claims, check token expiration, algorithms, and decode claims client-side.
How to Use the JWT Security Inspector
- Paste a JWT into the inspector.
- Review algorithm security warning and claims breakdown.
- Check expiration status.
Key Features
About JWT Security Inspector
Analyze JSON Web Tokens for security vulnerabilities: flags 'alg: none', checks expiration timestamps against current time, and decodes claim payloads.
Frequently Asked Questions
Does this tool transmit my token over the internet?
No. Decoding is performed purely client-side; tokens are never sent across the network.
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