How to Use

How to Use the JWT Decoder

Step 1: Paste JWT Token

Paste your JWT token (e.g., eyJhbGciOi...) into the input field.

Step 2: Decode

Click Decode to instantly see the header, payload, and signature of your token.

Step 3: Inspect Claims

Review the decoded claims like iss, sub, exp, iat. Check token expiration and user information.

Key Features

Instant JWT decoding
Header, payload, signature view
Pretty-printed claims
Expiration time display
Mobile friendly
100% free

Common Uses

Debugging authentication tokens
Inspecting API tokens
Checking token expiration
Learning JWT structure

FAQ

Q: Is it safe to decode JWT here?
A: Yes. All decoding happens in your browser. Your tokens are never sent to any server.

Q: What are JWT claims?
A: Claims are key-value pairs in the payload like iss (issuer), sub (subject), exp (expiration), and iat (issued at).

Q: Can I verify the signature?
A: This tool decodes the token but does not verify cryptographic signatures. Use jwt.io or backend libraries for verification.