Timestamp Converter
Convert Unix seconds or milliseconds to human-readable dates across time zones.
The Timestamp Converter turns Unix epoch numbers into human-readable dates and goes the other way too. Paste a 10-digit value in seconds or a 13-digit value in milliseconds and see the moment in UTC as well as your local zone; build an epoch from a date you pick and use it in tests or logs. It is the quickest way to make sense of the timestamps that appear in logs, database rows, and API payloads. The tool works completely in your browser, so it is fast and private. Unix time counts seconds since the start of 1970 in UTC, which makes it compact, sortable, and completely hostile to human reading, so converting between the number and a date is a constant task when you work with logs, databases, or API payloads. Reading a value begins with counting its digits: ten digits is almost always seconds and thirteen is almost always milliseconds, and getting that wrong shifts the result by decades. Showing the moment in UTC and in your local zone at the same time is the part that prevents real mistakes, because a value that looks like the wrong day in one zone can be perfectly correct when you account for the offset, and daylight saving adds another hour of confusion twice a year. The reverse direction matters just as much when you are writing a test, seeding a row, or constructing a query boundary, since you need the exact epoch number that corresponds to the instant you have in mind. Everything is computed in the browser, so it stays fast and private.
Converted dates appear here.
Frequently Asked Questions
What does it convert?
Unix epoch seconds or milliseconds to a human date and back, in UTC and your local zone.
Seconds or milliseconds?
Pick the unit your source uses; a 13-digit value is milliseconds, 10-digit is seconds.
Is this a network tool?
No. It formats locally; nothing leaves your browser.