OmniToolsFree

Timestamp converter

Convert seconds, milliseconds and ISO dates, then show the result in a time zone.

  • IANA time zone names
  • Runs in the browser

This runs in your browser. What you type is not uploaded by this tool.

How to use it

Three steps

  1. 01

    Paste a number or an ISO date, or use now.

  2. 02

    Force seconds or milliseconds if automatic detection is wrong.

  3. 03

    Pick a time zone. Asia/Kolkata is included.

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Read a JWT header and payload, and highlight expiry. The signature is not verified.

Questions

How does automatic unit detection work?

A number with 11 digits or more is treated as milliseconds. A smaller number is treated as seconds. You can override that.

What is relative time?

A short phrase such as 'in 2 hours' or '3 days ago', compared with the clock on this device.