JWT Decoder & Inspector
Decode and view JSON Web Token headers, payload, and claims.
How to Use JWT Decoder & Inspector
- Paste or type your input string, code snippet, or text block into the jwt decoder & inspector editor.
- Configure formatting rules, target case, indent spacing, or encoding parameters.
- Click Process to execute the transformation instantly inside browser memory.
- Copy the formatted output or download it as a text file.
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Frequently Asked Questions
What are the three components of a JSON Web Token (JWT)?
A standard JWT (RFC 7519) consists of three segments separated by dots (header.payload.signature). The Header identifies the signing algorithm and token type. The Payload contains identity and authorization claims. The Signature verifies message integrity.
Does decoding a JWT verify its cryptographic signature?
No. This tool decodes and inspects the Base64URL-encoded header and payload claims so you can read token data. Verifying the signature requires checking against your authentication provider's private signing secret or public JWKS certificate endpoint on a backend server.
How do I check if my JWT token is expired?
The tool automatically extracts the 'exp' (expiration) claim, converts the Unix timestamp to a human-readable ISO 8601 date, and displays whether the token is currently ACTIVE or EXPIRED compared to the present time.
What are common standard JWT claims and their meanings?
Standard claims include 'sub' (subject/user ID), 'iss' (issuer URL or service), 'aud' (intended audience), 'exp' (expiration epoch timestamp), 'iat' (issued-at timestamp), and 'nbf' (not-before validity timestamp).
Can I paste an Authorization header containing 'Bearer ' into this tool?
Yes. EverySolve automatically detects and removes the leading 'Bearer ' prefix if you copied the entire HTTP Authorization header directly from network dev tools or API logs.