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Unix Timestamp Converter

Convert a Unix timestamp (seconds or milliseconds) to a readable date, or a date to a timestamp. Great for reading log files and API responses.

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How to use it

Enter a timestamp, choose its unit (seconds/milliseconds), and convert to a date — or type a date and convert it to a timestamp. Results are shown in both UTC and your browser's local time zone.

Frequently Asked Questions

Is a Unix timestamp in seconds or milliseconds?

The Unix epoch is traditionally in seconds, while JavaScript's Date.now() returns milliseconds. A 10-digit value is usually seconds; a 13-digit value is usually milliseconds.

What is the Year 2038 problem?

On 32-bit signed systems, a second-based timestamp overflows on January 19, 2038. Modern 64-bit systems aren't affected.

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