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Unix Timestamp Converter

Convert between Unix timestamps and dates

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About This Tool

Unix Timestamp Converter is a bidirectional conversion tool between Unix timestamps and human-readable dates. It features a live current timestamp display, supports both seconds and milliseconds precision, and outputs local time, UTC, and ISO 8601 formats simultaneously. All processing runs locally in your browser.

Key Features

Quick Preview

Use Cases

timestamp datetime unix

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds elapsed since January 1, 1970 (UTC), also known as the Unix epoch. It is a universal way to represent a point in time regardless of timezone, commonly used in programming, databases, and APIs.

What is the difference between seconds and milliseconds?

Standard Unix timestamps are measured in seconds (e.g., 1700000000), while JavaScript and some systems use milliseconds (e.g., 1700000000000). The tool lets you toggle between the two units — the milliseconds value is simply the seconds value multiplied by 1000.

What formats does the output include?

The tool outputs five formats simultaneously: local time (YYYY-MM-DD HH:mm:ss), UTC time string, ISO 8601 string, timestamp in seconds, and timestamp in milliseconds. Each value has a copy button for quick use.

Does the live timestamp update automatically?

Yes. The current timestamp display at the top updates every second, showing both the numeric Unix timestamp and the corresponding human-readable date. This is useful when you need a quick reference for the current time in timestamp format.

Can I convert a date from the past or future?

Yes. The date-to-timestamp converter accepts any valid date via the datetime picker, including dates far in the past or future. The timestamp-to-date converter also handles any valid numeric timestamp within the JavaScript Date range.