Unix Timestamp Converter
Timestamp โ human date.
Unix Timestamp Converter at a glance
Unix Timestamp Converter is a free online converter you can use right now to timestamp โ human date โ no account, no install and no usage limit. It runs entirely inside your browser, so whatever you enter stays on your own device.
- Price
- Free โ no trial, no paid tier, no watermark
- Sign-up
- Not required
- Where it runs
- In your browser โ nothing is uploaded to a server
- Works on
- Chrome, Safari, Firefox and Edge โ desktop, tablet and phone
- Category
- Converters
Enter a Unix timestamp above.
About Unix Timestamp Converter
Convert a Unix timestamp into a readable date, or a date into a timestamp, in either seconds or milliseconds.
Unix time counts seconds since 1 January 1970 UTC. Systems store it because it is one unambiguous integer with no timezone, no locale and no daylight-saving edge cases โ and it is completely unreadable to humans, which is why anyone debugging logs or database records converts constantly.
The seconds-versus-milliseconds distinction causes most errors. Traditional Unix time is seconds, but JavaScript's Date.now() returns milliseconds, and mixing them produces dates in 1970 or tens of thousands of years in the future. A quick check: a current timestamp in seconds is about 10 digits, in milliseconds about 13.
Timezone is the other frequent confusion. A timestamp itself has no timezone โ it is an absolute point in time. The timezone only appears when it is formatted for display, which is why the same stored value legitimately shows different local times to different users. Bugs here usually come from converting to local time somewhere in a pipeline and then storing the result as if it were still UTC.
How to use Unix Timestamp Converter
- Paste a timestamp, or pick a date and time.
- Confirm whether your value is in seconds or milliseconds.
- Read the converted result in both UTC and your local timezone.
Frequently asked questions
Is my timestamp in seconds or milliseconds?
Count the digits โ a current timestamp is about 10 digits in seconds and 13 in milliseconds. JavaScript uses milliseconds while most backends and Unix tools use seconds, which is the usual source of the mix-up.
Why did my converted date land in 1970?
Because a millisecond value was read as seconds, dividing the elapsed time by a thousand and placing it just after the epoch. Switch the unit and it will convert correctly.
What timezone is a Unix timestamp in?
None โ it is an absolute point in time, counted from 1970 UTC. Timezone only enters when formatting it for display, which is why the same value shows different local times to different users.
What is the year 2038 problem?
Systems storing Unix time in a signed 32-bit integer overflow in January 2038. Modern systems use 64-bit values and are unaffected, but legacy and embedded software may still be at risk.