Unix Timestamp Converter
Convert between Unix epoch time and readable dates, in seconds or milliseconds.
Timestamp Converter
Convert between Unix epoch time and readable dates, in seconds or milliseconds.
Starts in your browser. Instructions are below.
How to use Timestamp Converter
- 01Paste a timestamp to see it as a date, or pick a date to get the timestamp.
- 02Switch between seconds and milliseconds if your value looks a thousand times out.
- 03Compare the UTC and local readings side by side.
About Timestamp Converter
Unix time counts the seconds since 1 January 1970 UTC, ignoring leap seconds. Ten-digit values are seconds; thirteen-digit values are milliseconds, which is what JavaScript produces.
Timestamps carry no time zone. The same number is a different wall-clock time in every region, which is exactly why storing epoch values and formatting them at display time avoids most date bugs.
Frequently asked questions
- Seconds or milliseconds?
- Ten digits is seconds, thirteen digits is milliseconds. The converter handles both.
- What time zone do timestamps use?
- None. They are always UTC-based. Local time is applied only when formatting.
- What is the year 2038 problem?
- Systems storing Unix time in a signed 32-bit integer overflow in January 2038. Modern 64-bit storage is unaffected.
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