Analyze a standard JWT
token = eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.test
Result: Structure: Header + Payload + Signature.
JWT Structure Analyzer
Paste a JWT to analyze its structure: validate format, decode the header, identify the signing algorithm, and check for common issues.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
What is the difference between JWT and JWE?
JWT typically refers to JWS (signed but not encrypted). JWE tokens have an encrypted payload and 5 parts.
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