Paste a JWT (three Base64URL parts separated by dots).
Formula
JWT = header.payload.signature, each part Base64URL-encoded
Worked example
A payload with “exp”: 1794086400 expires on 8 November 2026.
Frequently asked questions
Does this verify the signature?
No. Decoding only reads the content; verification needs the secret or public key.
Is it safe to paste a token?
Decoding happens locally, but avoid sharing production tokens anywhere.
What are exp and iat?
Expiry time and issue time, in Unix seconds.
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Results are estimates for information only. Check important figures with a professional.