Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Auto-detects seconds or milliseconds, with local, UTC, ISO, and relative time.
About This Free Online Unix Timestamp Converter
Our free Unix timestamp converter turns epoch timestamps into human-readable dates and back again. Paste a timestamp and it auto-detects whether it is in seconds or milliseconds, then shows the local time, UTC, ISO 8601, and a relative time like "3 days ago". Going the other way, pick a date and time to get the timestamp in both seconds and milliseconds. A live current Unix time is always on screen, with a one-click "use now". Everything runs in your browser — perfect for debugging APIs, logs, and databases.
Features of Our Unix Timestamp Converter
- Timestamp to date and date to timestamp
- Auto-detects seconds vs milliseconds
- Local, UTC, ISO 8601, and relative time
- Live current Unix time with one-click use
- Seconds and milliseconds output
- 100% private — browser-only processing
How to Use the Unix Timestamp Converter
Using this tool is simple and requires no signup or registration. Follow these steps:
- Paste a Unix timestamp to see the date in local, UTC, and ISO.
- Or pick a date and time to get the timestamp in seconds and milliseconds.
- Use the live current time or the "use now" button for the present moment.
- Click Copy to grab the result.
Frequently Asked Questions About Unix Timestamp Converter
What is a Unix timestamp?
A Unix timestamp (or epoch time) is the number of seconds since January 1, 1970, 00:00:00 UTC. It is a compact, timezone-independent way to represent a moment in time, used widely in programming and databases.
How does it know seconds vs milliseconds?
Millisecond timestamps are about 1,000× larger than second timestamps. The converter treats values of 13 or more digits (roughly 1e12 and up) as milliseconds and smaller values as seconds, and tells you which it detected.
What is the year 2038 problem?
Systems that store Unix time as a signed 32-bit integer overflow on January 19, 2038. This tool uses JavaScript numbers, so it handles dates far beyond 2038 without issue.
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