Unix timestamp converter

Convert Unix timestamps to dates and back — seconds or milliseconds, both directions.

Runs in your browser

No files needed100% local · no upload

Input

Mode

Output

Guide

How to convert unix timestamp converter

Pick a direction
Unix seconds → date, Unix milliseconds → date, or date → Unix timestamp.
Paste your value
A number like 1786224000, or a date like 2026-09-09 (leave it empty for the current moment).
Read the result
Dates are shown in UTC (ISO) and your local time zone; timestamps in seconds and milliseconds.

Frequently asked questions

What is a Unix timestamp?

The number of seconds elapsed since 1970-01-01 00:00 UTC. It is the standard way computers store points in time, immune to time zones and formats.

Seconds or milliseconds?

Both are common — Unix and most backends use seconds, JavaScript and Java use milliseconds. The tool handles both directions, and shows both when converting to a timestamp.

What happens with an empty input?

The tool uses the current moment — a quick way to grab "now" as a timestamp or read it as a date.

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