Unix Timestamp Converter
WebToola
Unix Timestamp Converter
Convert a Unix timestamp or a UTC date and time. Date input is always UTC; leap seconds are not supported.
About the Unix Timestamp Converter
The Unix Timestamp Converter lets you convert Unix timestamps to readable dates and convert UTC dates and times back to Unix timestamps.
Choose the conversion direction and specify whether the timestamp is in seconds or milliseconds. When converting a timestamp to a date, the tool displays the UTC date and time along with the corresponding local time reported by your browser.
When converting a date to a timestamp, the date and time you enter are always interpreted as UTC.
How to Convert a Unix Timestamp to a Date
Select Timestamp → UTC date, enter the Unix timestamp, and choose whether the timestamp is expressed in seconds or milliseconds.
For example:
Unix timestamp:
1767225600
Unit: Seconds
produces:
UTC: 2026-01-01T00:00:00.000Z
The tool also displays the corresponding time in your browser’s local timezone.
It is important to select the correct timestamp unit. The same numeric value interpreted as milliseconds represents a completely different point in time.
For example:
Unix timestamp:
1767225600
Unit: Milliseconds
produces:
UTC: 1970-01-21T10:53:45.600Z
So the timestamp value alone isn’t always enough—you also need to know whether it represents seconds or milliseconds.
How to Convert a UTC Date to a Unix Timestamp
Select UTC date → Timestamp, choose the desired timestamp unit, and enter the UTC date and time.
For example:
UTC date and time: January 1, 2026 at 00:00:00 UTC
When the unit is seconds, the result is:
1767225600 seconds
When the unit is milliseconds, the result is:
1767225600000 milliseconds
The date input is always treated as UTC rather than your browser’s local timezone.
What Is a Unix Timestamp?
A Unix timestamp, also known as Unix time or epoch time, represents a point in time as the amount of time that has elapsed since the Unix epoch:
January 1, 1970 at 00:00:00 UTC
Unix timestamps are widely used in programming, APIs, databases, logs and other computer systems because they provide a numerical way to represent points in time.
For example, the Unix timestamp:
1767225600
when expressed in seconds represents:
2026-01-01T00:00:00.000Z
Unix Timestamp Seconds vs. Milliseconds
One of the most important things to check when working with Unix timestamps is the unit.
A Unix timestamp in seconds counts the number of seconds relative to the Unix epoch. A timestamp in milliseconds uses thousandths of a second instead.
For the same point in time:
Seconds
1767225600
Milliseconds
1767225600000
The millisecond representation is therefore 1,000 times the seconds representation.
Selecting the wrong unit can result in a date that is dramatically different from the one you expected.
UTC Time vs. Local Time
UTC (Coordinated Universal Time) provides a common time reference that does not depend on a user’s local timezone.
When you convert a timestamp to a date, WebToola displays the result in UTC and also shows the equivalent local time reported by your browser. The local representation can differ depending on the browser/device timezone.
For example, your supplied test result for 1767225600 seconds is:
UTC: 2026-01-01T00:00:00.000Z
Browser local time: Thu Jan 01 2026 00:00:00 GMT 0 (…)
The underlying point in time is the same; only its timezone representation differs.
When performing the reverse conversion with this tool, remember that the date input is always UTC.
Common Uses for Unix Timestamps
Unix timestamps are frequently encountered when working with APIs, databases, application logs, authentication data, scheduled events and software development.
A timestamp converter is particularly useful when debugging data because a numeric epoch timestamp isn’t immediately readable. Converting it to a UTC date makes it much easier to understand when an event occurred.
The reverse conversion is useful when an application or API requires a Unix timestamp but you have a human-readable UTC date.
Frequently Asked Questions
How do I convert a Unix timestamp to a date?
Enter the timestamp, select Timestamp → UTC date, and choose whether your timestamp is in seconds or milliseconds. The converter will display the corresponding UTC date and your browser’s local-time representation.
How do I convert a UTC date to a Unix timestamp?
Choose UTC date → Timestamp, select seconds or milliseconds, and enter the UTC date and time. The calculator will return the corresponding Unix timestamp in your selected unit.
What is the Unix epoch?
The Unix epoch is:
January 1, 1970 at 00:00:00 UTC
Unix time measures elapsed time relative to this reference point.
What is the difference between Unix timestamps in seconds and milliseconds?
A timestamp in seconds counts seconds relative to the Unix epoch, while a millisecond timestamp counts milliseconds. For the same point in time, the millisecond timestamp is 1,000 times the seconds timestamp.
Is Unix time the same as UTC?
Not exactly. A Unix timestamp is a numerical representation of a point in time, while UTC is a time standard used to represent dates and times. A Unix timestamp can be converted into a human-readable UTC date.
Does the date input use my local timezone?
No. When converting a date to a timestamp, the date and time you enter are always interpreted as UTC.
Why does the calculator show my browser’s local time?
When converting a timestamp to a date, the calculator also shows the corresponding local-time representation based on your browser’s timezone. This lets you compare the UTC result with how that same instant is represented locally.
Does the converter support leap seconds?
No. Leap seconds are not supported by this converter.
Does WebToola store my timestamps or dates?
No. The Unix Timestamp Converter runs in your browser and does not send or save the values you enter.