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JWT Claims Checker

Check exp, nbf, iat, issuer and audience against an explicit reference time and leeway.

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Does not verify the signature. Times must be safe integer Unix seconds. Expiration is required for the overall check to pass; missing optional time claims are reported.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Check exp, nbf, iat, issuer and audience against an explicit reference time and leeway.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

exp=1767229200, now=1767225600 → expiration check passes

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: