Unix timestamp converter
Convert a Unix timestamp to a readable date (UTC and local) and back.
- Instant
- Free
- Private (processed locally)
- No sign-up
Epoch ↔ date at a glance
Paste a Unix timestamp to read the date in UTC, local time and relative form; or pick a date to get seconds and milliseconds. A counter shows the current timestamp live.
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Enter a timestamp
Or click “Now”.
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Read the date
UTC, local and relative.
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Reverse way
Date → seconds + ms.
Good to know
- Epoch = 1 January 1970, 00:00 UTC
- 10 digits = seconds, 13 = milliseconds
- UTC is absolute; local time depends on the time zone
- Current-timestamp clock updates every second
Useful references
| Timestamp (s) | UTC date |
|---|---|
| 0 | 1970-01-01 00:00:00 |
| 1000000000 | 2001-09-09 01:46:40 |
| 1700000000 | 2023-11-14 22:13:20 |
100% local calculation with your browser clock. No data transmitted.
Frequently asked questions
What is a Unix timestamp?
It is the number of seconds elapsed since 1 January 1970 at 00:00 UTC (the “epoch”). It serves as a universal reference across computer systems.
Seconds or milliseconds?
The tool auto-detects: ~10-digit values are read as seconds, ~13-digit ones as milliseconds. The date → timestamp conversion returns both.
Why do UTC and local time differ?
A timestamp is absolute (UTC). Local time applies your device’s time zone and daylight saving; both point to the same instant.
Is my data uploaded?
No. Everything is computed locally with your browser clock; no data is transmitted.