Timestamp Converter
Current timestamp：
About this tool
A Unix timestamp is the number of seconds — or milliseconds — that have passed since midnight UTC on 1 January 1970. Because it is just a number with no timezone attached, it is the most reliable way for computers to record a precise moment. This tool converts a timestamp into a readable date and a readable date back into a timestamp.
It automatically recognises both 10-digit second values and 13-digit millisecond values, and lets you view the result in your local timezone or in UTC. A live current-timestamp readout is always shown at the top.
All conversion happens in your browser, so it works offline and keeps your data private.
How to use
- Copy the current timestamp shown at the top, or enter your own value.
- Use Timestamp → Date to turn a number into a readable date.
- Use Date → Timestamp to turn a date into a Unix value.
- Switch the timezone selector to compare local time with UTC.
Common use cases
- Reading timestamps found in server logs and databases
- Converting an API's time field into a human-readable date
- Working out the same moment across different timezones
- Setting or checking expiry times stored as Unix seconds
Frequently asked questions
What's the difference between seconds and milliseconds?
Unix timestamps are usually in seconds (10 digits), but JavaScript uses milliseconds (13 digits). The tool detects and converts both.
Does it use my local timezone?
Yes, dates are shown in your browser's timezone, and you can also read the UTC value.
What is a Unix timestamp?
It's the number of seconds since 00:00:00 UTC on 1 January 1970 — a timezone-independent way to represent a moment in time.
My timestamp shows a date in 1970 — why?
You probably entered seconds where milliseconds were expected, or the reverse. A 13-digit number is milliseconds and a 10-digit number is seconds; check the length if the year looks wrong.
What is the year 2038 problem?
Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038. Modern platforms use 64-bit values, which push that limit far into the future.