Epoch Converter
Convert Unix epoch time to a human date and back — seconds, milliseconds, microseconds or nanoseconds detected automatically, any time zone, a live clock and every developer format.
- Your data never leaves your device
- 100% free
- No sign-up
- Works offline after first load
How to use the epoch converter
- Paste a timestamp (seconds, ms, µs or ns) — or a date to get its timestamp.
- Pick the time zone; the date, every format and the working appear instantly.
- Switch to “Date → timestamp” or “Batch convert”, then copy, share or download.
About Epoch Converter
Convert Unix epoch time to a human date and back. Everything is worked out in your browser and updates as you type.
The result comes with the other forms you might need, a table to copy or download, and the working shown step by step. You can share a link to your conversion, keep a history and print the result.
Good for
- Reading log files and database fields
- Debugging APIs, JWT expiry and cron jobs
- Converting between programming languages
Tip: Paste a mixed list of second and millisecond timestamps into “Batch convert” — each one is detected on its own.
Frequently asked questions
What is a Unix timestamp?
The number of seconds since 1 January 1970 00:00:00 UTC (the Unix epoch), not counting leap seconds. It is the same moment everywhere in the world.
Seconds or milliseconds?
Both are detected automatically: 10 digits are seconds (used by Unix, PHP, Python), 13 digits are milliseconds (JavaScript, Java), 16 microseconds and 19 nanoseconds. You can also pick the unit.
How do I convert a date to a timestamp?
Open “Date → timestamp”, pick the date, time and time zone — the Unix time in seconds and milliseconds appears instantly, with ISO 8601 and other formats.
What is the year 2038 problem?
Systems that store the timestamp as a signed 32-bit number overflow on 19 January 2038 at 03:14:07 UTC (2,147,483,647 seconds). The converter flags timestamps beyond it.
Which other formats are shown?
ISO 8601, RFC 2822, relative time, day of the year, ISO week, Excel serial, Windows FILETIME / LDAP, .NET ticks, Apple Cocoa time, Julian day and hex.
Can I convert many timestamps at once?
Yes — “Batch convert” takes one timestamp per line (mixed seconds and milliseconds are fine) and gives a table you can copy or download.