The Epoch / Unix Timestamp Converter turns Unix timestamps into readable dates and back again. It shows the current epoch time live, converts a timestamp (in seconds or milliseconds) to your local time, UTC, and ISO 8601, and converts any date and time back into a timestamp.
Everything is calculated in your browser, so it’s instant and private.
How to convert a timestamp
- Read the current Unix time at the top, updating every second.
- Type a timestamp to see it as a local date, UTC, and ISO — the tool auto-detects seconds vs milliseconds.
- Pick a date and time to get its Unix timestamp in both seconds and milliseconds.
- Click the copy icon next to any value to copy it.
What is Unix / epoch time?
Unix time (or epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, not counting leap seconds. It’s a simple, timezone-free way for computers to represent a moment in time, which is why it appears throughout logs, APIs, and databases.
Some systems use milliseconds instead of seconds (for example JavaScript’s Date.now()). This converter detects large numbers as milliseconds automatically so you don’t have to guess.
Seconds vs milliseconds
- A 10-digit timestamp (like 1700000000) is almost always seconds.
- A 13-digit timestamp (like 1700000000000) is milliseconds.
- This tool shows which one it detected so you can be sure.
Frequently Asked Questions
How do I convert a Unix timestamp to a date?
Paste the timestamp into the “Timestamp → date” box. The tool shows it in your local time, UTC, and ISO 8601, and tells you whether it read it as seconds or milliseconds.
Is epoch time in seconds or milliseconds?
Classic Unix time is in seconds, but many programming languages use milliseconds. This converter handles both and auto-detects which you entered.
What timezone does the timestamp use?
A Unix timestamp itself is timezone-independent (based on UTC). This tool shows both your local time and UTC so you can read it either way.
What is the ISO 8601 format?
ISO 8601 is a standard date-time format like 2023-11-14T22:13:20.000Z. It’s widely used in APIs because it’s unambiguous and sortable.