Unix Timestamp Converter
Convert Unix timestamps to readable dates and times, or convert dates and times back to Unix timestamps with this free online Unix Timestamp Converter. Quickly work with Unix time in seconds or milliseconds for development, APIs, databases, logs and testing.
How to Use
1. Choose Your Conversion
Use the tool to convert a Unix timestamp into a readable date and time, or convert a date and time into a Unix timestamp.
2. Enter Your Timestamp or Date
Enter a Unix timestamp in seconds or milliseconds, or select the date and time you want to convert.
3. Convert the Value
Click the appropriate Convert button to process your timestamp or date.
4. Review and Copy the Result
View the converted result and copy it for use in your application, API, database, logs, testing or other development project.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and times, or convert a date and time into a Unix timestamp. Choose between seconds and milliseconds and view the converted result instantly.
What Do These Results Mean?
UTC
The converted date and time in Coordinated Universal Time (UTC), a standard time reference used worldwide.
Local Time
The converted date and time displayed according to the time zone settings on your device or browser.
ISO 8601
A standardized date and time format commonly used in software, APIs and data systems, such as 2025-10-09T08:53:20.000Z.
Unix Timestamp in Seconds
The number of seconds that have elapsed since the Unix epoch: 1 January 1970 at 00:00:00 UTC.
Unix Timestamp in Milliseconds
The same Unix time represented in milliseconds rather than seconds. A millisecond timestamp is therefore 1,000 times the equivalent timestamp in seconds.
Timestamp Unit
Lets you tell the converter whether the timestamp you entered represents seconds or milliseconds, so it can interpret the value correctly.
Example
See how a Unix timestamp can be converted into a readable date and time.
Example Unix Timestamp:
1760000000
Timestamp Unit:
Seconds
Converted Results:
UTC: Thu, 09 Oct 2025 08:53:20 GMT
ISO 8601: 2025-10-09T08:53:20.000Z
Explanation
The Unix timestamp 1760000000 represents the number of seconds that have elapsed since the Unix epoch on 1 January 1970 at 00:00:00 UTC.
When converted, it represents:
9 October 2025 at 08:53:20 UTC
The Local Time result may be different from the UTC result because it is displayed according to the time zone settings of the visitor’s device or browser.
For example, when you tested it, your browser displayed 09:53:20 local time while UTC was 08:53:20.
Important: Always check whether a timestamp is expressed in seconds or milliseconds before converting it. Selecting the wrong unit will produce a different date or may result in an invalid date.
How Unix Timestamps Work
Unix timestamps represent a specific point in time as the amount of time that has passed since the Unix epoch.
Unix Epoch
Unix time begins at 1 January 1970, 00:00:00 UTC. This starting point is known as the Unix epoch.
Timestamp in Seconds
A standard Unix timestamp commonly represents the number of seconds that have elapsed since the Unix epoch.
Timestamp in Milliseconds
Some systems use milliseconds instead of seconds. A millisecond timestamp is 1,000 times the equivalent timestamp expressed in seconds.
Timestamp to Date
The converter takes the timestamp and converts it into a human-readable date and time, including UTC, local time and ISO 8601 formats.
Date to Timestamp
When you enter a date and time, the converter calculates its corresponding Unix timestamp in both seconds and milliseconds.
Time Zones
Unix timestamps represent a point in time independently of a display time zone. The same timestamp can therefore appear as different clock times when displayed in different local time zones.
Browser-Based Processing
The ToolNestPro Unix Timestamp Converter performs these conversions directly in your browser without requiring an external API.
Unix Timestamp Terms Explained
Understand the key terms used when converting Unix timestamps, dates and times.
Unix Timestamp
A numerical value representing the amount of time that has passed since the Unix epoch.
Unix Epoch
The starting point for Unix time: 1 January 1970 at 00:00:00 UTC.
UTC (Coordinated Universal Time)
A global time standard commonly used by computers, servers, APIs and other technical systems.
Local Time
The date and time displayed according to the time zone settings of the user's device or browser.
ISO 8601
An international standard for representing dates and times in a consistent format, commonly used in software and APIs.
Seconds
A common unit used for Unix timestamps, representing the number of seconds since the Unix epoch.
Milliseconds
One-thousandth of a second. Some programming languages and systems represent Unix timestamps in milliseconds rather than seconds.
Frequently Asked Questions
Find answers to common questions about Unix timestamps, Unix time and converting timestamps to dates.
What is a Unix timestamp?
A Unix timestamp represents a point in time by counting the seconds that have elapsed since 1 January 1970 at 00:00:00 UTC, known as the Unix epoch.
How do I know if my timestamp is in seconds or milliseconds?
Unix timestamps may be stored in either format depending on the system. Millisecond timestamps are typically longer because they represent the same point in time using a value 1,000 times the equivalent seconds timestamp. If you're working with an application or API, check its documentation to confirm the expected unit.
Why is my local time different from UTC?
UTC is a global time standard, while Local Time is displayed according to your device or browser's time-zone settings. The same Unix timestamp represents the same moment even when the displayed local clock time differs.
Can I convert a date back into a Unix timestamp?
Yes. Select a date and time in the Date & Time to Unix Timestamp section and click Convert Date & Time. The tool will return the corresponding Unix timestamp in both seconds and milliseconds.
Disclaimer
This Unix Timestamp Converter is provided for general development and informational purposes.
Results may be affected by the date, time and time-zone settings of your browser or device.
Always verify critical timestamps and time-zone requirements before using converted values in production systems, applications or time-sensitive processes.