⏱️Unix Timestamp Converter

How to Use

1. 1

   Choose a conversion direction

   Select "Timestamp → Date" to convert a Unix timestamp to a human-readable date, or "Date → Timestamp" to go the other way.

2. 2

   Select the unit

   Choose "Seconds" for standard Unix timestamps (10 digits) or "Milliseconds" for JavaScript-style timestamps (13 digits).

3. 3

   Enter the value or click Now

   Type the timestamp in the input field, or click the Now button to use the current time.

4. 4

   Copy the result

   The converted values appear immediately. Click Copy next to any format to copy it to your clipboard.

FAQ

What is a Unix timestamp?

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on January 1, 1970 (the Unix epoch). It is widely used in programming and databases to represent points in time in a timezone-independent way.

What is the difference between seconds and milliseconds?

Most Unix timestamps are expressed in seconds (a 10-digit number, e.g. 1700000000). JavaScript's Date.now() and many APIs return milliseconds (a 13-digit number, e.g. 1700000000000). This tool supports both — just select the correct unit before converting.

Why is the date off by a few hours?

The UTC result always shows the correct UTC time. The "Local Date/Time" result is adjusted to your browser's local timezone. If you are in a timezone with a UTC offset (e.g. UTC+9 for Japan), the local time will differ from UTC accordingly.

Is there a maximum timestamp value?

JavaScript's Date object can handle timestamps up to approximately ±8,640,000,000,000,000 milliseconds from epoch (about ±275,760 years). In practice, any reasonable date in history or the near future will work fine.