What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is a standard way to represent points in time in software.

Does my timestamp use seconds or milliseconds?

Unix timestamps are typically in seconds (10 digits in 2025). JavaScript uses milliseconds (13 digits). The tool auto-detects based on value size.

What is the maximum date a Unix timestamp can represent?

32-bit signed Unix timestamps can represent dates up to January 19, 2038 (the Year 2038 problem). Modern systems use 64-bit which extends this to hundreds of billions of years.

Why does my timestamp show a different time than expected?

Unix timestamps are in UTC. If your local timezone is different, the displayed local time will be offset. The tool shows both UTC and local time to avoid confusion.

Developer Tools

Convert between UTC, local time, and Unix timestamp

Time Converter

Convert between UTC, local time, and Unix timestamp

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Time Conversion

Input Format

Timestamp Input

Learn more about Timestamp Converter

About Timestamp Converter

Convert Unix epoch timestamps to human-readable dates and times, or convert any date and time back to a Unix timestamp. Supports both seconds and milliseconds, and shows UTC alongside your local timezone.

Key features

Convert Unix timestamp (seconds) to date and time
Convert Unix milliseconds to date and time
Convert any date/time back to Unix timestamp
Shows both UTC and local timezone results
Displays current timestamp that updates live

How to use Timestamp Converter

1Enter a Unix timestamp in the input field to see the human-readable date
2Or select a date/time to get the corresponding Unix timestamp
3Results are shown in both UTC and your local timezone
4Use the "Now" button to get the current timestamp

Frequently asked questions

What is a Unix timestamp?: A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is a standard way to represent points in time in software.
Does my timestamp use seconds or milliseconds?: Unix timestamps are typically in seconds (10 digits in 2025). JavaScript uses milliseconds (13 digits). The tool auto-detects based on value size.
What is the maximum date a Unix timestamp can represent?: 32-bit signed Unix timestamps can represent dates up to January 19, 2038 (the Year 2038 problem). Modern systems use 64-bit which extends this to hundreds of billions of years.
Why does my timestamp show a different time than expected?: Unix timestamps are in UTC. If your local timezone is different, the displayed local time will be offset. The tool shows both UTC and local time to avoid confusion.