Epoch Timestamp Converter
Unix time ⇄ human date, both directions — seconds or milliseconds, UTC or local.
Quick answer: Free Unix timestamp converter: convert epoch seconds/milliseconds to human dates and back, with UTC and local time. Now button included.
–Your local time
–UTC
–Seconds
–Milliseconds
How to use
- Open this page on any device — no signup needed.
- Fill in the fields above.
- Get your result instantly — nothing is uploaded.
About this tool
Unix time counts seconds since 1970-01-01 UTC — the standard time format for databases, APIs and logs. Millisecond timestamps (13 digits, common in JavaScript/Java) are detected automatically against 10-digit second timestamps. Debug API dates, expiry claims (JWT exp) and log lines in seconds.
FAQ
Seconds or milliseconds?
10 digits = seconds, 13 digits = milliseconds. This tool auto-detects. 1e12–1e14 boundary values are shown both ways if ambiguous.
What happens at 2038?
32-bit signed seconds overflow in January 2038 — modern 64-bit systems are unaffected.
Is epoch affected by time zones?
No — Unix time is always UTC; display converts to local zones.
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