Timestamp Converter
Convert Unix timestamps to human-readable dates and back, in any timezone.
Timestamp → Date
- Your local time
- UTC
- ISO 8601
- Relative
Date → Timestamp
Interpreted in your local timezone.
- Seconds
- Milliseconds
Convert Unix timestamps both ways
Paste a Unix timestamp to see it as a local date, UTC date, ISO 8601 string, and a human-friendly relative time ("in 3 days", "2 hours ago") — or pick a date and time to get its timestamp in both seconds and milliseconds. Handy for debugging APIs, log files, and database records that store dates as raw epoch numbers.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp (or "epoch time") is the number of seconds that have elapsed since midnight UTC on January 1, 1970, ignoring leap seconds. It's the standard way computers store a point in time as a single number, independent of timezone or calendar formatting.
Seconds or milliseconds — how do I know which mine is?
A 10-digit number (like 1765900800) is seconds; a 13-digit number (like 1765900800000) is milliseconds — JavaScript's Date.now() and most web APIs use milliseconds, while most Unix/Linux tools and databases use seconds. This tool auto-detects which one you've pasted based on the digit count.
Does the converted date account for my timezone?
Yes — the "Your local time" row uses your browser's detected timezone, and there's a separate UTC row alongside it so you can see both at once and copy whichever you need.
Does this work offline?
Yes — it's plain JavaScript Date math with no server round-trip, so it keeps working without an internet connection once the page has loaded.