🔐JWT Decoder

How to Decode JWT Tokens?

1. Paste your JWT token in the Token text area.
2. Click Decode to extract header and payload.
3. View the decoded header and payload in JSON format.
4. Click Copy Header or Copy Payload to copy specific parts.
5. Note: Signature verification is not performed (requires secret key).

Free JWT Decoder & Inspector

Decode any JSON Web Token (JWT) instantly and inspect its header and payload claims. JWTs are widely used for authentication and API authorization — but their contents are Base64-encoded and not immediately human-readable. This tool decodes them in your browser so you can inspect expiry times, user claims, algorithm, and issuer without any setup.

What You Can Inspect

• Header — Algorithm (alg) and token type (typ), e.g. HS256, RS256
• Payload — Claims like sub (subject/user ID), exp (expiry), iat (issued at), iss (issuer), and custom application claims
• Expiry Check — Spot expired tokens quickly by checking the exp timestamp

100% client-side decoding — your token is never sent to any server. Note: this tool decodes but does not verify the signature.