How to Use This Timestamp Converter
Unix to Date: Enter a Unix timestamp (in seconds or milliseconds) into the input field. The tool auto-detects the format and displays the corresponding date in ISO 8601, UTC, and your local timezone.
Date to Unix:Switch to the “Date → Unix” tab, pick a date and time using the datetime picker, and instantly get the equivalent Unix timestamp in both seconds and milliseconds.
Use the Copy button next to any result to copy it to your clipboard. The Current Timestamp section updates every second.
What Is a Unix Timestamp?
A Unix timestamp (also called Unix time, Epoch time, or POSIX time) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds. It is widely used in programming, databases, and APIs as a universal way to represent a point in time.
Unix timestamps are often stored as 10-digit (seconds) or 13-digit (milliseconds) integers. For example, the timestamp 1717171200 corresponds to May 31, 2024 at 12:00:00 UTC.
Frequently Asked Questions
What is the difference between seconds and milliseconds?
A Unix timestamp in seconds is 10 digits long (e.g., 1717171200). In milliseconds, it is 13 digits (e.g., 1717171200000). This tool auto-detects the format based on the number of digits.
Is a Unix timestamp affected by timezones?
No. A Unix timestamp is always UTC-based and does not change with timezones. The same timestamp represents the same moment everywhere in the world. Timezone only affects how it is displayed as a human-readable date.
Why do developers use Unix timestamps?
Timestamps are timezone-agnostic, easy to compare, sort, and store as integers. They are universally supported across all programming languages and databases without worrying about locale or timezone conversion.
Will Unix timestamps overflow?
The Year 2038 problem — 32-bit systems will overflow on January 19, 2038. Most modern systems use 64-bit integers, which will not overflow for billions of years.