Timestamp Converter
Convert Unix epoch timestamps to readable dates and back, in any timezone. It runs entirely in your browser, so the file never leaves your computer.
The number in every log file
Computers count time as a single integer: seconds since midnight UTC on 1 January 1970. It is unambiguous, timezone-free and easy to do arithmetic with, which is why it is in your logs, your database rows and your API responses.
It is also completely unreadable. 1700000000 is a real moment in time and no human knows which one. Paste it here and get the date in your timezone, in UTC, and in the standard string formats, each with a copy button.
Seconds or milliseconds
Unix time comes in two scales and mixing them produces dates in 1970 or in the year 56000. Seconds is the classic form; milliseconds is what JavaScript and many APIs use, and it is a thousand times larger.
The tool detects which you pasted — very large numbers are milliseconds — and you can force either if the guess is wrong. Converting the other way gives you both.
Daylight saving, which simple tools get wrong
Converting a date in a named timezone is not a matter of adding a fixed offset. New York is UTC−5 in January and UTC−4 in July, and a converter that stores one number for the zone will be an hour out for half the year.
This resolves the zone's actual offset for the specific date you entered, so a summer date and a winter date in the same city both come out right. It is the sort of thing you only notice when it is wrong, usually at the worst moment.
Questions
Common questions
What does this tool do?
It converts between Unix timestamps (the long number computers use for time, like 1700000000) and normal readable dates, in both directions and in any timezone.
How do I convert a timestamp to a date?
Paste the timestamp number into the epoch box and it shows the date in your timezone, in UTC, and in standard formats, with copy buttons on each.
How do I convert a date to a timestamp?
Type a date into the date box (or use 'Use now'), pick the timezone to read it in, and it gives you the epoch value in both seconds and milliseconds.
What's the difference between seconds and milliseconds?
Both count time from the same starting point, but milliseconds are 1000x larger. The tool detects which one you pasted automatically (very large numbers are milliseconds), and you can force either if needed.
What's the live 'now' ticker?
It shows the current Unix time, updating every second, with buttons to copy it as seconds or milliseconds — handy when you just need the current timestamp.
Does it handle daylight saving time correctly?
Yes. When you enter a date in a timezone, it works out that zone's exact offset for that specific date — so a summer date and a winter date in the same city convert correctly, which many simple tools get wrong.
Is anything uploaded?
No. Everything runs on your own computer in the browser — nothing leaves your machine.
Our own software
Dictate it instead of typing it
Hold a key, say the sentence, and the words land in whatever Windows window you were already in. Runs on your own PC — no account, no upload, nothing to renew.
$79 launch price · $99 regular · buy once