Text & code · runs locally
Convert Unix timestamps
Seconds, milliseconds, microseconds or nanoseconds in — human date, RFC 3339 and every epoch size out.
Runs on your device
No uploads, ever
Free, no account
- 1Paste a number
10 digits is seconds, 13 milliseconds, 16 microseconds, 19 nanoseconds; fractional epochs work too.
- 2Or paste a date
ISO strings and common date formats convert in the other direction.
- 3Copy what you need
Local time, UTC, ISO 8601, RFC 3339 and every epoch size — all shown at once.
Questions people actually ask
Why does my timestamp look two decades off?
The seconds-versus-milliseconds mix-up — the single most common bug in timestamp history. The tool labels which one it read, so you'll see the mistake immediately.
What's the 2038 problem?
The date when 32-bit systems run out of seconds. Watch it happen here, live, if you paste 2147483647.