CraftTools

World Clock & Time Zone Converter

Guide: The Pomodoro Technique: How to Focus in 25-Minute Sprints

Nothing you enter or choose here leaves your device. This tool runs in your browser.

How to use

  1. 1Add the places you care about.
  2. 2Switch to Convert a time and enter a date, time and place.
  3. 3Read the matching time everywhere.

Frequently asked questions

Does it handle daylight saving?

Yes. It uses your browser's built-in time zone data, so changes are included.

How do I add a place?

Type a zone such as Africa/Lagos in the box, or tap one of the quick buttons.

Are my places saved?

They are saved on this device only.

Can I plan a meeting?

Yes. Use Convert a time and enter the start in your own zone.

Is my data sent anywhere?

No. Everything runs in your browser and nothing is sent to us.

Read the guides

Learn how this works and how to get the most from it.

Money, health & time

The Pomodoro Technique: How to Focus in 25-Minute Sprints

How the Pomodoro Technique works, the exact steps, how to adjust the timings, and what to do when interruptions get in the way.

2 min read

Money, health & time

Time Zones, UTC and Daylight Saving: A Practical Guide

Why time zones cause bugs and missed meetings, what UTC is, how daylight saving shifts things, and rules for working across zones.

2 min read

Unix Timestamp Converter

Convert Unix epoch timestamps to dates and back, in any time zone.

Date Calculator

Count the days between dates or add and subtract time from a date.

Online Stopwatch

A simple stopwatch with lap times.

Cron Expression Explainer

Explain a cron schedule in plain English and see its next run times.