Ling.Tools

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Unix timestamp

Convert Unix seconds or milliseconds to ISO 8601, UTC and local time, or turn a date back into a timestamp.

Input & settings

01
Configure tool input
Processed in your browser. Your input is never uploaded or saved.

Result

02

Ready when you are

Set up your input and run the tool. Your result will appear right here.

Private · Instant · Local

GUIDE & CONTEXT

About this tool

Unix time counts elapsed time from 1970-01-01T00:00:00Z. APIs commonly use seconds while JavaScript dates use milliseconds. A timestamp identifies an instant; UTC and your browser’s local timezone are different representations of that same instant.

How to use it

  1. Choose timestamp-to-date or date-to-timestamp.
  2. For numeric input, explicitly select seconds or milliseconds. For dates, include a timezone offset when the instant must be unambiguous.
  3. Convert and compare the ISO, UTC and local representations.
Example

1704067200 seconds equals 2024-01-01T00:00:00.000Z; the millisecond form is 1704067200000.

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