Timestamp Converter

A Unix timestamp counts seconds since 1 January 1970 in UTC. Systems use it because it is a single number that avoids time zone text, daylight saving confusion and different date formats.

This tool converts both ways: from a Unix timestamp in seconds to a readable date in UTC and in your local time, and from a date and time you pick to a Unix timestamp in seconds.

How to Use This Tool

1. Timestamp to date: enter seconds, then click Convert to Date.
2. Date to timestamp: pick a date and time, then click Convert to Timestamp.
3. Check seconds versus milliseconds: if your number has 13 digits, it is probably milliseconds, so divide it by 1000 first.

Good Practice Tips

• Store UTC, show local: store timestamps in UTC, then convert to local time only for display.
• Watch the unit: mixing seconds and milliseconds is the most common timestamp bug.
• Test edge dates: daylight saving changes can shift local times, so test dates near a clock change.