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Unix Timestamp Converter

Developer Tools

Convert Unix epoch seconds to dates and back.

Runs entirely in your browser — nothing is uploaded

Features

  • Two-way conversion between epoch values and calendar dates.
  • Detects seconds versus milliseconds automatically.
  • Shows UTC, ISO 8601, local time and relative time together.
  • A "now" button for the current timestamp.

How to use the Unix Timestamp Converter

  1. 1Paste an epoch number, or pick a date and time.
  2. 2Read every representation in the results panel.
  3. 3Copy whichever format you need.

Frequently asked questions

Seconds or milliseconds?

Unix time is seconds; JavaScript Date.now() returns milliseconds. Ten-digit values are seconds, thirteen-digit values are milliseconds — the tool detects this for you.