Rainbow.surf — merge duplicate Google Calendar events

Colorfully merge duplicate Google Calendar events into one rainbow and give the weekends a background color.

Rainbow.surf – Merge Google Calendar Duplicates

Rainbow.surf — merge duplicate Google Calendar events is a free Chrome extension designed to declutter shared calendars by combining duplicate events into a vibrant, singular entry. It adds colorful backgrounds to weekends for better visibility, ensuring your calendar looks visually appealing without altering event data. This open-source tool operates entirely in your browser, prioritizes user privacy, and offers a seamless experience while keeping your shared calendars organized.
Install from Chrome Web Store

Extension stats

Manifest V3
Users: 1,000+
Version: 2.2.2 (Last updated: 2024-12-24)
Creation date: 2021-09-11
Permissions:
  • https://calendar.google.com/*
Size: 1.86M
Full description: See detailed description

Other platforms

Not available on Android
Not available on Firefox
Not available on Edge

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Helps to merge calendar events and reduce duplication clutter.
  • Adds visual enhancements that improve the organization and appearance of Google Calendar.
  • Responsive support team, addressing user issues promptly.
  • Allows for better organization with color-coded calendars.
Cons
  • The blue background for weekends clashes with user event colors.
  • Some merged events may disappear from the calendar instead of merging correctly.
  • The extension is difficult to find and could benefit from a more descriptive name.
Most mentioned
  • Helps with duplication clutter.
  • Visually enhances the calendar experience.
  • Responsive support team.
User reviews
Thank you for all your work, it looks and works great. I do, however, second the review about dark mode. If there could be some kind of option toggle to set/disable a different weekend color, that would be great, please. For now, I just unchecked the "Show weekends" option in the Google Calendar settings. I'll submit the feature request on GitHub.
by Alex Jacobson, 2025-03-07

Please remove the background color on the weekend days. It makes dark mode unusable.
by Travis Wieser, 2025-03-06

best event merge extension for sure, but is there any way to not have the blue background behind the weekends. its really ugly to me, and clashes heavily with my event colours. especially when i already have an extension that shades days, but its hidden underneath this extensions weekend colour.
by miffy, 2024-12-23
View all user reviews

Extension safety

Risk impact

Rainbow.surf — merge duplicate Google Calendar events requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Request access to the following domains: google.com
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Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of Rainbow.surf — merge duplicate Google Calendar events. Use it at your own risk.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
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  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* ** * ******** ********* ** ****** *** *****
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Promo images

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