JWT exp Claim Debug Example

JWT exp values are usually Unix timestamps in seconds. Decode and convert them before debugging auth code.

Payload example 
{
  "sub": "123",
  "iss": "https://auth.example.com",
  "aud": "api",
  "iat": 1715947200,
  "exp": 1893456000
}

How to use this example

  1. Decode the JWT header and payload.
  2. Convert exp, iat and nbf to UTC.
  3. Verify signature and expected claims on the server.

Notes

  • Decoded payload is not proof of trust.
  • Do not use JavaScript milliseconds where JWT expects seconds.

Related tools and fixes

JWT JWT Decoder

Decode JWT header and payload locally, inspect common claims, and catch expiration or audience mistakes without sending tokens to an API.

 Time Unix Timestamp Converter

Convert Unix timestamps to readable dates, generate current timestamps and debug log, JWT and scheduling issues.

 JSON JSON Validator and Formatter

Validate JSON, format it for reading, or minify it for compact API payloads without sending data to an external API.

 JWT JWT Expired But Token Looks Valid Fix

A decoded JWT can look fine while still being expired, not yet valid, signed with the wrong key or meant for a different audience.

Last updated: May 18, 2026