Unix Timestamp Converter

Converted on your device using its clock and time zone data. Nothing is uploaded.

A little guidance

One moment.
Every format.

Paste a Unix timestamp to read it as a date, or type a date to get its timestamp. Seconds, milliseconds, UTC and your time zone stay side by side.

Convert a timestamp to a date

Paste a Unix timestamp. Up to 11 digits is read as seconds; 12 or more as milliseconds. Switch between s and ms if the guess is wrong.
Pick a time zone. Your browser’s time zone is selected first.
Click any format to copy it for logs, APIs or databases.

Convert a date to a timestamp

Type a date such as 2026-09-25 14:22 or 2026-09-25T14:22:00Z. A date without an offset is read in the selected time zone; a trailing Z or offset such as +08:00 takes priority. Select “Now” to start from the current time.

Seconds vs milliseconds

Seconds · 10 digits today: Used by Unix tools, most databases and many APIs. 1700000000 is 14 November 2023, 22:13:20 UTC.
Milliseconds · 13 digits today: Used by JavaScript, Java and many log pipelines. Reading milliseconds as seconds lands thousands of years in the future, so both are always shown.

ISO 8601 (for example 2026-09-25T14:22:00Z) is the safest text format for exchanging times between systems. The HTTP date format is used in headers such as Last-Modified.

Common questions

What is a Unix timestamp?

The number of seconds, or milliseconds, since 1 January 1970 at 00:00:00 UTC. It is common in logs, APIs and databases because it does not depend on a time zone.

Why is the result a few hours off from my computer?

Usually because of time zones. Compare the UTC value first, then your local zone. Regions with daylight saving time shift by another hour for part of the year.

Are negative timestamps supported?

Yes. Negative values are dates before 1970, such as -86400 for 31 December 1969. Any date your browser can represent is supported.

How accurate is “Now”?

It uses your device’s clock and time zone data. This tool converts formats; it is not an authoritative time source.

Are my timestamps sent to DSOOU?

No. Conversion happens in your browser, and the values you enter are not uploaded or saved.