Unix timestamp converter
Translate Unix seconds or milliseconds into readable local and UTC dates, or turn a selected date and time into both timestamp units.
Local processing
Result
Your result will appear here
The input stays available if you need to adjust a setting.
How to use unix timestamp converter
- 1
Enter a Unix timestamp or choose a date.
- 2
Convert the value.
- 3
Copy the UTC, local, seconds, or milliseconds result.
A realistic example
Convert `1735689600` seconds into its UTC and local calendar values.
Supported formats and limits
Input: Unix seconds, Unix milliseconds, or local date/time. Output: UTC, local, seconds, and milliseconds.
- The browser's local timezone controls local output.
- Extremely large dates outside JavaScript's supported range are rejected.
Questions people ask
How does the tool detect seconds versus milliseconds?
Values below one trillion are treated as seconds; larger values are treated as milliseconds.
Why is local time different from UTC?
Local output applies your browser's current timezone rules.