Cool Clock - Chrome Web Store
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An extension fully loaded with tons of useful time-related features... But the best part is, it is totally COOL.

This is not your ordinary clock on a toolbar. This does more than that. Time-telling is one of the main feature of this extension, and different methods are often prefered in displaying time. In this, you can modify multiple the appearance of the clock, which is located in the toolbar. Let's take a step further. Why do you need to look for the time yourself when you can be informed with the time automatically on intervals? This extension also provides an hourly notification, which can be configured to even announce the time with TTS. Stopwatch, alarm, and countdown timer are included along with a simple calendar. You can also type "clock" in the Omnibox to quick search your to-dos and alarms within seconds. == Features == - Hourly notifications - If you hide your Windows start bar, you can tell the time right in your browser - Editable appearances - Timezone settings - If you want want to hide the clock temporarily, just check that in the option page. - Lots of ways to display the time - Details in the popup - Includes clock, calendar and digital clock... == Open Source == This is an open source project. Source can be found at This extension is no longer in active development, but feel free to contribute to the project by creating a pull request on GitHub. == Social Media == Facebook Page: Tweet it: == Legal Stuff == "Google Calendar" is a trademark of Google Inc. Use of this trademark is subject to Google Permissions. "Chrome Clock" has changed its name to "Cool Clock" on 2-2-2011.

4.2 out of 51.7K ratings

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JarmenApr 3, 2024

It's not working anymore. All I see in the extension tab is a blue background with "Alarm Clock Countdown Timer Stopwatch Calendar More" text.

17 out of 17 found this helpful
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Masoud ShiroieJan 3, 2024

The best

2 out of 4 found this helpful
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Teanes SeyoMar 23, 2023

used to not working properly for months and I leaved it like that in the junks of the useless extensions, but today I uninstalled it and reinstalled right back then volla! the countdown and alarm functions back to function. before use need untick the "Use new popup design" in options.

12 out of 13 found this helpful


  • Version
  • Updated
    March 4, 2018
  • Offered by
    Derek L.
  • Size
  • Languages
    27 languages
  • Developer
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


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