Timestamp / Epoch Debugger
Convert epoch values in seconds or milliseconds.
Paste a Unix timestamp or an ISO date. We detect units, show UTC and local time, and highlight drift for exp/nbf/iat debugging.
Input
Tip: offsets help simulate server clock drift when tokens appear expired too early.
Output
Waiting for inputSummary
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UTC
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Local
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Timestamp debugging tips
Seconds vs milliseconds
Large values (13 digits) are usually milliseconds. Use auto-detect to confirm.
Clock drift
If tokens expire early, compare issuer/server clocks and simulate offsets.
Time zones
Always compare UTC timestamps to avoid local time mismatches.