Paste a Unix timestamp to convert it
Enter any integer into the timestamp field and click Convert from timestamp. The tool auto-detects whether the value is seconds (10 digits) or milliseconds (13 digits) and outputs both formats together.
Free, privacy-first
Translate between Unix seconds, Unix milliseconds, UTC, and local date-time formats without leaving the browser.
Results update as you use the interface above.
Paste a Unix timestamp to decode it or choose a local date and time to convert it into Unix seconds and milliseconds.
Enter any integer into the timestamp field and click Convert from timestamp. The tool auto-detects whether the value is seconds (10 digits) or milliseconds (13 digits) and outputs both formats together.
Use the date-time picker to select a moment in your local time zone and click Convert from date. You get back the Unix seconds and milliseconds for that instant.
The result shows Unix seconds, Unix milliseconds, ISO 8601, UTC, and local time together. Compare them side by side to confirm the timezone offset and unit before copying.
Click Now to load the current time in both input fields and convert it immediately. The current time display in the panel also refreshes every second as a live reference.