Unix Timestamp Converter
Turn an epoch timestamp into a readable date — in your local time and UTC — or convert a date back into Unix seconds and milliseconds.
🔒 100% private — nothing is uploaded
Timestamp → Date
Local time —
UTC (ISO 8601) —
UTC (readable) —
Relative —
Date → Timestamp
Epoch seconds —
Epoch milliseconds —
UTC (ISO 8601) —
How it works
A Unix timestamp is the number of seconds (or milliseconds) since 00:00:00 UTC on 1 January 1970 — the "epoch". This tool converts in both directions, entirely in your browser.
1
Paste a timestamp
Enter epoch seconds or milliseconds. Auto mode detects the unit by length, or pick it yourself.
2
Read the date
See the moment in your local time zone and in UTC, plus a friendly "how long ago" relative label.
3
Or go the other way
Pick a date and time to get its epoch value, or hit Now to grab the current instant.
🔒
Private by design. Every conversion happens right here using your browser's built-in date functions. Nothing is uploaded — your timestamps never leave your device.
Frequently Asked Questions
What is a Unix timestamp? ▼
It's the number of seconds (or milliseconds) that have passed since midnight UTC on 1 January 1970 — a moment known as the "epoch". It's a simple, time-zone-free way to store an exact instant.
Does it handle seconds and milliseconds? ▼
Yes. In Auto mode it detects the unit from the length of the number, or you can force Seconds or Millis yourself. It also tells you which unit it used.
Which time zone are the results shown in? ▼
You get both your own local time zone and UTC (in ISO 8601 and a readable form), plus a friendly "how long ago" label — so you can read the moment whichever way you need.
Can I convert a date back into a timestamp? ▼
Yes. Pick a date and time in the Date → Timestamp section to get its epoch seconds and milliseconds, or press Now to grab the current instant.
Can I convert dates before 1970? ▼
Yes. Negative timestamps represent moments before the epoch, and those convert correctly to their calendar date and time.
Are my timestamps sent to a server? ▼
No. Every conversion uses your browser's built-in date functions and runs entirely on your device — nothing is uploaded and your data never leaves the page.