Timestamp Converter
Paste a numeric timestamp below, and this epoch converter outputs the exact date and time in UTC and your local timezone.
About
About Timestamp Converter (Unix ↔ Date)
Unix epoch time counts seconds elapsed since midnight UTC on January 1, 1970, which is efficient for a database or a server log to store but meaningless to glance at. An epoch converter translates that raw number back into a calendar date, and this timestamp converter also runs the math in reverse, turning a human-readable date into the exact numeric value a database query needs.
One detail that trips people up constantly: a standard Unix timestamp measured in seconds is ten digits for any modern date, but JavaScript and a lot of modern web APIs work in milliseconds instead, which shows up as thirteen digits. Pasting a thirteen-digit number into a field expecting seconds gives you a date somewhere in the far future, and pasting a ten-digit number where milliseconds are expected lands you back near 1970, both easy mistakes to make and easy to spot once you know what to look for.
Comparing timestamps across servers in different regions is exactly where epoch time earns its keep, since it's a single, unambiguous number with no timezone attached to it at all, the timezone conversion only happens when you choose to display it. That's also precisely why debugging a cross-region server issue by eyeballing local timestamps gets confusing fast, the underlying epoch value is the one consistent reference point.
Paste a numeric timestamp in, or enter a calendar date to convert the other direction. The result shows in both UTC and your browser's local time, and you can toggle between seconds and milliseconds depending on what format your database or API actually outputs.
The conversion correctly accounts for leap years and irregular month lengths automatically, so there's no manual calendar math involved regardless of how far back or forward the date falls. Everything calculates using your browser's own clock logic, so server logs and database values you're debugging never get sent anywhere external.
FAQ
Frequently asked questions
What is Unix epoch time, exactly?
It's the number of seconds elapsed since midnight UTC on January 1, 1970, used internally by nearly every modern operating system, database, and programming language as the standard way to represent a point in time.
Why does my converted date show up as 1970?
That usually means you've entered a very small number, which the converter correctly reads as only a few seconds or minutes past the epoch's starting point. A modern date needs the full ten-digit timestamp.
How do I tell if my timestamp is in seconds or milliseconds?
A standard Unix timestamp in seconds is ten digits long for any current date. Thirteen digits means milliseconds, which is the format JavaScript and many web APIs default to. This tool lets you toggle between the two.
Can I convert a regular date back into a timestamp?
Yes, enter a human-readable date and the tool calculates the exact epoch value, useful when you need to insert a specific date into a database query or an API call that expects a numeric timestamp.
Does the converter handle leap years correctly?
Yes, the underlying calendar math automatically accounts for every leap year and irregular month length, so the output date is always mathematically accurate regardless of how far back it goes.
Is my data logged anywhere when I use this?
No, the conversion runs locally through client-side JavaScript. Server logs, database timestamps, or anything else you paste in never get transmitted anywhere.
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