Unix Timestamp Converter
Convert between Unix epoch time and readable dates, in seconds or milliseconds.
- ISO 8601 (UTC)
- 2026-09-18T20:21:19.000Z
- UTC
- Fri, 18 Sep 2026 20:21:19 GMT
- Local time
- 9/18/2026, 8:21:19 PM
- Time zone
- UTC
- Unix seconds
- 1789762879
- Unix milliseconds
- 1789762879000
- Relative
- now
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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