Unix Timestamp Converter
Unix seconds or milliseconds, read back as a date.
FREE - NO SIGN-UP - RUNS ON YOUR DEVICE
Timestamps stay in this browser tab
- s / msboth units read
- UTCand your local time
- Liveupdates as you type
- 0values uploaded
Unix Timestamp Converter at a glance
- What you enter
- A direction and one value
- What you get
- UTC, local time, seconds, millis
- Units
- Seconds or milliseconds
- When it updates
- Updates as you type
- Time zone
- Follows your device time zone
- Price
- Free
- Account required
- No
- Where it runs
- Runs locally in your browser
How to use Unix Timestamp Converter
- 1
Choose the direction
Pick the direction.
- 2
Enter the value
Paste a timestamp or set a date.
- 3
Copy what you need
Copy the result.
Frequently asked questions
Seconds or milliseconds — which is mine?
Both are read. Check the date that comes back: if it lands far from where you expected, the value was taken in the other unit, so switch and read it again.
Why is the local time different from a colleague's?
Local time follows the time zone the device is set to. UTC is the same everywhere, so quote UTC when the reading has to match across machines.
Is the value I paste uploaded?
No. The conversion runs in the current browser tab, and the timestamp is not sent to a server or stored.
Can I go from a date back to a timestamp?
Yes. Switch the direction to date-to-timestamp, set the date, and Unix seconds and Unix milliseconds are shown together with the UTC and local readings.
Reading a timestamp in context
Paste a timestamp to read it as UTC and as your local time, or go the other way and turn a date into seconds and milliseconds. Both are shown together.
- A timestamp is a count from the Unix epoch, so it carries no time zone of its own until it is displayed.
- UTC is the reading to quote in a bug report; local time is the reading that tells you what your day looked like.
- Copy result keeps all readings together, so the unit that was used stays visible in your notes.
Full specification
| What you enter | A direction, then either a timestamp or a date. |
|---|---|
| What you get | UTC, your local time, Unix seconds and Unix milliseconds, side by side. |
| Units | Seconds and milliseconds are both read. |
| When it updates | The output changes whenever an input changes, using the browser date APIs described in the panel. |
| Time zone | Local time follows the time zone your device is set to, so it can differ from another machine. |
| Price | Free |
| Account required | No |
| Where it runs | All calculations run locally in the current browser tab. |
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