Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back. Supports both seconds and milliseconds, with UTC and local time output.
All computations run locally in your browser, no data uploaded to server.
How To Use
- Paste a Unix timestamp (seconds or milliseconds) or a date string.
- Click Timestamp to Date to see UTC and local times.
- Click Date to Timestamp to get seconds and milliseconds.
- Use Use current time to load the current epoch.
Usage Example
Timestamp:
1750000000
Converts to 2025-06-15T15:06:40Z in UTC.
Reverse: entering that date gives 1750000000 seconds.
Frequently Asked Questions
Seconds or milliseconds?
The tool auto-detects 10-digit (seconds) and 13-digit (milliseconds) timestamps. You can also type a plain date string.
Is my timestamp sent anywhere?
No. All conversion uses JavaScript's native Date object
locally in your browser.
What timezone does it use?
The tool shows both UTC and your browser's local timezone, so you can verify either representation.