Convert Unix timestamps
Seconds or milliseconds in, human date out — and the reverse — plus the current time for reference.
Runs on your device
No uploads, ever
Free, no account
How it works
- Paste a number
10 digits is seconds, 13 is milliseconds. The tool detects which and says so.
- Or paste a date
ISO strings and common date formats convert in the other direction.
- Copy what you need
Local time, UTC, ISO 8601 — all shown at once, so you can grab the format your system wants.
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.