Unix Timestamp Converter — Free
Convert between Unix timestamps and human dates. 100% in your browser — free, no sign-up.
- ✓Free
- ✓No sign-up
- ✓Runs in your browser — files never uploaded
- ✓No watermark
How to
- 1Enter a Unix timestamp, or pick a date.
- 2Read the converted value — it is computed in your browser.
- 3Watch the seconds-vs-milliseconds unit if a result looks off.
What is a Unix timestamp?
A Unix timestamp is the number of seconds (or milliseconds) since midnight UTC on 1 January 1970, called the epoch. It is a simple, timezone-free way to store a moment in time, which is why databases, logs, and APIs use it everywhere.
How conversion works here
Enter an epoch value to see the human-readable date, or pick a date to get its timestamp. It handles both seconds and milliseconds and computes everything in your browser — nothing is uploaded.
When to use it
Read the timestamp in a log line or API response, set an exact expiry value, debug why two times do not match, or convert a date into the epoch a system expects. It is a constant need when working with logs and APIs.
Seconds vs milliseconds
Unix timestamps usually come in seconds (10 digits today) but many languages, including JavaScript, use milliseconds (13 digits). If a converted date looks wildly wrong, you are probably mixing the two — check the digit count.
FAQ
Does it handle seconds and milliseconds?+
Yes. It converts both. If a date looks wildly wrong, you are probably mixing the two — check the digit count (10 vs 13).
Is my data uploaded?+
No. Conversions are computed in your browser, so nothing is sent anywhere.
What is a Unix timestamp?+
The number of seconds (or milliseconds) since 1 January 1970 UTC — a simple, timezone-free way to store a moment in time.
Can I convert a date back to a timestamp?+
Yes. Enter an epoch value to get the date, or pick a date to get its timestamp.
Is it free?+
Yes, completely free — no sign-up and no watermark.
Is my data private?+
Yes — this tool runs entirely in your browser. Your files and text are never uploaded.