Free Unix Timestamp Converter
Convert a Unix timestamp into a readable date and time, or convert a date and time into Unix seconds and milliseconds. Choose UTC or your device’s local time zone. Free to use, with conversions performed in your browser.
Timestamp to Date
Enter a Unix timestamp in seconds or milliseconds, not a date like 14/10/2026. Example: 1791976020 (seconds) or 1791976020000 (milliseconds).
Date to Timestamp
Choose a date, time, and time zone to generate a Unix timestamp.
What is a Unix timestamp?
A Unix timestamp is a number that counts the time elapsed since 1 January 1970 at 00:00:00 UTC, also known as the Unix epoch. It represents a moment in time rather than a date formatted for a particular country or time zone.
Unix timestamp in seconds vs. milliseconds
Unix timestamps are commonly stored in seconds, while many programming languages and APIs use milliseconds. For dates around the present day, seconds values usually have 10 digits and milliseconds values usually have 13 digits. This converter can detect the unit automatically, or you can select seconds or milliseconds yourself.
UTC and local time zones
The timestamp itself is independent of a display time zone. UTC provides a consistent reference, while local date and time are formatted using your device’s time zone. When converting a date to a timestamp, choose UTC to interpret the entered date and time as UTC, or choose your device’s local time zone to use its local setting.
How to convert a date to a Unix timestamp
Choose a date and time, select the intended time zone, and select Convert to Timestamp. The tool displays both seconds and milliseconds so you can use the format required by your application or API.
Frequently asked questions
Is this Unix timestamp converter free?
Yes. You can convert timestamps and dates for free without creating an account.
How can I tell whether a timestamp uses seconds or milliseconds?
For current dates, a seconds timestamp commonly has 10 digits and a milliseconds timestamp commonly has 13 digits. Use automatic detection or choose the unit explicitly when you know the source format.
Why can the same timestamp show a different date or time?
The timestamp identifies the same moment, but local clock displays vary by time zone. Compare the UTC result when you need a consistent reference across devices.
Are my timestamp and date inputs uploaded?
No. The conversion runs in your browser; the values you enter are not sent to NinaTools for conversion.