JWT Decoder
Decode JWT headers and payloads instantly for auth debugging and token inspection.
JSON Web Tokens (JWTs) are widely used for authentication and information exchange in modern web applications. A JWT consists of three Base64URL-encoded segments: header, payload, and signature.
This tool decodes the header and payload of any JWT so you can inspect claims like user ID, expiration time, and issuer. Use it to inspect token contents during frontend auth work, API testing, or debugging login flows. Note that decoding only reads the data and does not verify the cryptographic signature.
Header
Payload
How to Use
Follow these quick steps to get the result you need.
Paste a JWT token into the input area.
Review the decoded header and payload JSON panels.
Copy the decoded values to inspect claims, expiry, and token metadata.
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