Unix Timestamp Converter
Convert Unix timestamps to dates and back. Everything updates live and stays on your device.
Timestamp → Date
Date → Timestamp
Free online Unix timestamp converter
A Unix timestamp is the number of seconds that have elapsed since midnight UTC on 1 January 1970, known as the Unix epoch. It's the format most databases, APIs and log files use to store a moment in time because it's compact, timezone-independent and easy to compare. This converter turns any epoch timestamp into a readable date in both UTC and your local timezone, and works the other way too — pick a date and get the timestamp back instantly.
Seconds or milliseconds, detected automatically
Some systems store timestamps in seconds while others (notably JavaScript) use milliseconds. This tool auto-detects which you pasted based on its length, so you don't have to guess. All conversion happens directly in your browser — nothing you enter is uploaded or stored anywhere.
Frequently asked questions
What's the difference between seconds and milliseconds?
A seconds timestamp counts whole seconds since the epoch (10 digits for current dates), while a milliseconds timestamp counts thousandths of a second (13 digits). This tool treats any 13-digit number as milliseconds and everything else as seconds.
Why do the UTC and local times differ?
A timestamp represents one exact instant, but that instant is displayed differently depending on your timezone. UTC is the universal reference, while the local time reflects your device's timezone and daylight saving settings.