OptiDrop

Timestamp Converter — Unix Timestamp to Date Online

Convert between Unix timestamps and human-readable dates instantly. Also displays the live current timestamp. 100% free, no sign-up, all processing in your browser.

Current Unix Timestamp

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Timestamp to Date

Date to Timestamp

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Free Timestamp Converter Online

OptiDrop's Timestamp Converter is a free online tool that converts between Unix timestamps and human-readable date formats. Whether you are a developer debugging log files, working with APIs, or simply need to know what a timestamp means in human terms, this tool makes it instant and easy.

What Is a Unix Timestamp?

A Unix timestamp is the total number of seconds elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is the standard way computers and programming languages represent dates and times. The timestamp is a single integer, making it easy to store, compare, and compute with dates.

Seconds vs Milliseconds

Unix timestamps can be in seconds (10 digits) or milliseconds (13 digits). This tool automatically detects which format you enter. JavaScript uses milliseconds internally (Date.now()), while many other systems use seconds. The converter shows both formats when converting from a date.

Frequently Asked Questions

A Unix timestamp (also called Unix epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is widely used in operating systems, file formats, and programming languages to represent dates and times as a single integer.
The current Unix timestamp changes every second. This tool displays a live-updating current timestamp that refreshes every second. The timestamp shown is always the current time in UTC. You can copy it with a single click.
A seconds timestamp has 10 digits and represents time in seconds since the Unix epoch. A milliseconds timestamp has 13 digits and represents time in milliseconds. Many programming languages and APIs use milliseconds (e.g., Java, JavaScript's Date.now()). This tool automatically detects which format you are using.
Use the "Date to Timestamp" section of this tool. Enter a date and time using the date and time inputs, and the tool instantly converts it to a Unix timestamp in both seconds and milliseconds. You can also use the "Now" button to set the current date and time.

Last updated: June 2026