A worked example
The same instant in two units
- Start with
- 1704067200 or 1704067200000
- Check the result
- UTC 2024-01-01T00:00:00.000Z
Both numbers represent the same instant. The local display varies with the device’s time zone.
Developer & Data tool
Unix Timestamp Converter
Read a Unix value from a log as a date, or convert local date and time into timestamps.
Local time uses the current device’s time zone. Compare it with the UTC result.
Unix timestamp ↔ dateSeconds and milliseconds are detected automatically.
LOCALLocal
10/12/2026, 9:15:10 PMUTC
2026-10-12T21:15:10.000ZSeconds
1791839700Milliseconds
1791839700000Read log timestamps
Check numbers and dates in both directions
When you have a Unix value
Enter it on the left. The tool infers seconds or milliseconds from digit count and shows local time alongside UTC.
When you have a date and time
Choose a local date and time on the right. Results are shown in seconds and milliseconds using the device’s time zone; copy the unit you need.
Verify the source unit
Check whether your log or API uses seconds or milliseconds. Also confirm that the UTC result has the expected year and date rather than relying on digit detection alone.