Google Cal Event Merge

Name: Google Cal Event Merge
Rating: 4.2857 (21 reviews)
Author: Amy Ciavolino

Chrome extension that visually merges the same event on multiple Google Calendars into one event. Source: https://github.com/imightbeamy/gcal-multical-event-merge

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Google Cal Event Merge is a Chrome extension designed to help users manage overlapping events across multiple Google Calendars. It visually merges the same event that appears on different calendars into a single unified event, reducing clutter and enhancing calendar clarity. This tool is ideal for users who maintain several Google Calendars and want to streamline their schedule view without manual merging.

By simplifying event displays and merging duplicates, Google Cal Event Merge improves productivity and scheduling accuracy. It's a must-have extension for professionals and individuals managing complex calendar setups.

Add-on Productivity

By:

Daily users:

Rating:

Version:

2.2.1 Last updated: 2019-07-01

Version code:

4741801

Creation date:

2018-02-17

Risk:

Permissions:

https://www.google.com/calendar/*
https://calendar.google.com/*
storage

Size:

153.09KB

URLs:

Website

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-12

Ranking

# 3,869 ▼ 7

Other rankings

#1 in event keyword 20

#24 in prevent keyword 29

#80 in google tasks keyword 39

#82 in google docs keyword 52

#82 in google keep keyword 48

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User reviews

Google Cal Event Merge is praised for effectively consolidating duplicate events on Google Calendar, addressing a missing feature for many users. It works well for most, offering a cleaner calendar view and compatibility with Firefox. However, multiple users report it leaves empty spaces where events were merged, causing visual gaps. Some experience JavaScript-related performance issues and desire more control over event selection upon clicking. The striped visual theme and lack of support for the Gmail sidebar calendar are also noted drawbacks.

Pros

Effectively reduces visual clutter by merging duplicate events on Google Calendar.
Provides a long-desired feature not present by default in Google Calendar.
Generally works well for multiple users without major issues.
Compatible with Firefox and appreciated by users migrating from Chrome.
The basic functionality fulfills its main purpose of event merging.

Cons

Leaves gaps or blank lines where merged events originally appeared, not reclaiming vertical space.
Struggles or causes JavaScript errors that can slow down or break the Google Calendar page for some users.
Lacks options to select which event opens when clicking on a merged event.
Does not work on the embedded calendar in the Gmail sidebar.
Some users find the striped event theme too aggressive or visually distracting.

Recent reviews

by 敬念*****, 2025-03-26

by 远离*****, 2025-02-25

by Ma*****, 2024-09-06

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Google Cal Event Merge requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: {{requestedDomains}}
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Google Cal Event Merge has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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