Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates — supports seconds and milliseconds

What Is a Unix Timestamp?

A Unix timestamp (also called 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 provides a universal, timezone-independent way to represent a point in time as a single integer. For example, the timestamp 1700000000 represents November 14, 2023, 22:13:20 UTC. JavaScript and some APIs use millisecond timestamps (13 digits) instead of seconds (10 digits).

Unix timestamps are the standard time representation in databases, APIs, server logs, JWT tokens, and most backend systems. Converting between timestamps and human-readable dates is a daily task for developers debugging log entries, setting token expiration times, scheduling events, calculating time differences, and working with any system that stores time as epoch seconds or milliseconds.

How to Convert Unix Timestamps

1. Enter a Unix timestamp (seconds or milliseconds) to convert to a human-readable date
2. Or select a date and time using the date picker to generate the corresponding timestamp
3. The tool auto-detects whether your input is seconds (10 digits) or milliseconds (13 digits)
4. View the result in your local timezone and UTC simultaneously
5. Copy the converted value for use in your code, API requests, or database queries

Why Use PinusX Timestamp Converter?

PinusX converts timestamps with 100% client-side processing in your browser. Your timestamps — which may come from production logs, authentication tokens, or internal systems — never leave your device. Timestamps can reveal operational details about your infrastructure: when events occurred, when tokens expire, when system changes were made. In November 2025, jsonformatter.org leaked over 80,000 user credentials processed through their servers. PinusX runs all conversions locally in your browser tab, keeping your debugging and development context private.

Frequently Asked Questions

What is the current Unix timestamp?

The current Unix timestamp updates every second. Our tool displays the live current timestamp at the top of the page. You can also get it in JavaScript with Math.floor(Date.now() / 1000) for seconds or Date.now() for milliseconds. The timestamp increments by 1 for each second that passes.

How do I tell if a timestamp is seconds or milliseconds?

Count the digits. A 10-digit number (like 1700000000) is seconds since epoch. A 13-digit number (like 1700000000000) is milliseconds. Our tool auto-detects the format. If a seconds timestamp gives a date far in the future, you may have accidentally used milliseconds and should divide by 1000.

Does the converter handle negative timestamps?

Yes. Negative timestamps represent dates before the Unix epoch (January 1, 1970). For example, -86400 represents December 31, 1969. This is useful for historical date calculations. All dates between 1901 and 2038 are representable in 32-bit signed timestamps; 64-bit timestamps extend this range by billions of years.

What is the Year 2038 problem?

32-bit signed integers can represent timestamps up to January 19, 2038, 03:14:07 UTC (2,147,483,647 seconds). After this, the value overflows to negative, causing dates to wrap to 1901. Most modern systems use 64-bit timestamps which will not overflow for billions of years. Check your database column types if you store timestamps.

How do I convert timestamps in different timezones?

Unix timestamps are always UTC by definition — they represent a universal instant in time. The human-readable date changes based on timezone, but the timestamp value is the same everywhere. Our tool shows both UTC and your local timezone. To convert between timezones, change the display timezone without modifying the timestamp.

Your data never leaves your browser. 100% client-side processing.