Unix Timestamp Converter
Convert Unix timestamps to readable dates, and convert UTC or local dates back to epoch time. Everything runs in your browser.
Seconds and milliseconds
Most Unix timestamps are 10 digits in seconds. JavaScript and some APIs use 13-digit millisecond timestamps.
UTC and local output
UTC is stable across systems. Local output uses your device time zone, which is useful when reading browser logs or app events.
Private browser utility
All conversion runs locally in your browser. No timestamp, date or log value is uploaded to Convertr.
Related developer tools
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds that have passed since January 1, 1970 at 00:00:00 UTC. Many APIs, databases and logs use it to store time.
Does this converter use seconds or milliseconds?
It supports both. Shorter values are treated as Unix seconds, and longer 13-digit values are treated as milliseconds. You can also choose the unit manually.
Is the timestamp converted on the server?
No. All conversion runs locally in your browser. The timestamp or date you type is not uploaded.
Why do UTC and local time differ?
UTC is a global time standard. Local time applies your device time zone offset and daylight saving rules, so the displayed hour may be different.