Google Docs Extension Guide: Add-ons, Chrome Extensions, Offline

A “Google Docs extension” usually means one of two things: an add-on that you install from the Google Workspace Marketplace and open from the Extensions menu inside Docs, or a Chrome extension that runs in your browser alongside Docs. For most people the quickest route is to open a document and go to Extensions > Add-ons > Get add-ons, then install what you need.

Below is how each type works, how to install and remove them the official way, and what to check before you give an add-on access to your files. Menu names and policies change, so treat the steps as accurate as of October 2026.

Add-ons vs. Chrome extensions: which one do you need?

The two get mixed up because Docs renamed its old “Add-ons” menu to Extensions, while Chrome also uses the word “extensions” for browser plug-ins. They are installed in different places and behave differently.

As a rule of thumb: if the tool needs to change your document’s content (insert citations, merge data, add e-signature fields, export to another system), it is almost always an add-on. If it works across every website you visit, such as a grammar checker or a screenshot tool, it is usually a Chrome extension.

Two kinds of Docs add-ons

Google’s developer documentation describes two add-on types you may run into in Docs:

• Editor add-ons are the classic kind. They extend Docs, Sheets, Slides or Forms, appear under Extensions > Add-ons, and run only in desktop browsers, not on Android or iOS.
• Google Workspace add-ons are a newer kind that can extend several Google apps at once, such as Gmail, Calendar and Docs. They typically show up as an icon in the right-hand side panel.

Google’s pages are not fully consistent on mobile support for Workspace add-ons in Docs: the general overview says the type supports mobile, while the page on extending the editors says mobile is not available. If you rely on a tool on your phone, check its Marketplace listing first.

How to install a Google Docs add-on

These are the official steps from Google Docs Editors Help:

1. On a computer, open any Google Doc.
2. Click Extensions > Add-ons > Get add-ons. This opens the Marketplace already filtered to apps that work with Docs.
3. Search or browse by category, then click the add-on you want.
4. Click Install.
5. Read the permissions request carefully. It lists the data the add-on needs, such as access to your documents. Click Allow only if you are comfortable with it.
6. Click Done when installation finishes.

To use it afterwards, open a document and go to Extensions > Add-ons, then choose the add-on. Workspace-style add-ons may appear in the right-hand side panel instead.

You can also browse directly at workspace.google.com/marketplace, which is handy when you want to compare several options before installing.

If an older add-on won’t install

Google moved Editor add-ons from the Chrome Web Store to the Workspace Marketplace. According to Google’s help page, an add-on that has not been moved to the Marketplace can no longer be installed, although copies that were already installed keep working and some may need reinstalling. If an older guide points you to an add-on you cannot find, that migration is the likely reason. Look for an alternative on the Marketplace rather than an unofficial copy.

How to manage or uninstall an add-on

Per Google’s Workspace add-ons help page:

1. Open a document.
2. Go to Extensions > Add-ons > Manage add-ons. For a side-panel add-on, you can instead click its icon on the right, then More > Manage add-ons.
3. Find the add-on, open its Options menu, and choose Uninstall.
4. Reload the document so the add-on disappears from the side panel.

Two things can trip you up:

• Organization-installed add-ons. On some work and school accounts, the organization installed the add-on for everyone. You cannot remove those yourself; contact your administrator.
• Shared documents. If an add-on still pops up in a shared file after you uninstall it, a collaborator may have it installed on their own account. Your uninstall only affects your account.

Google Docs Offline: the official Chrome extension

The one Chrome extension most Docs users actually need comes from Google itself: Google Docs Offline. It lets you create, view and edit Docs, Sheets and Slides without an internet connection, then syncs your changes when you reconnect.

Google’s offline help page lists the requirements: you must be online while you set it up, use Google Chrome or Microsoft Edge, and not be in private (incognito) browsing.

To turn it on:

1. Install the Google Docs Offline extension from the Chrome Web Store. In Edge, Google redirects you to the Chrome Web Store to get it.
2. Open Google Drive, click the Settings gear at the top right, and choose Settings.
3. Switch on Offline.

Turning offline access on in Drive, Docs, Sheets or Slides turns it on for all of them. You can also enable it from inside a document by clicking the cloud status icon next to the file name. To guarantee a specific file is available, right-click it in Drive (or click More) and choose Available offline; a check mark confirms it.

Before you click Allow: a quick safety check

Add-ons often ask for broad access, such as permission to view and edit all your Docs. That is sometimes genuinely needed, but it deserves a moment’s thought, especially on a work account. Our checklist for long-term fit:

• Install from the Marketplace or Chrome Web Store only. Skip sites offering add-ons as downloads.
• Read the permissions screen. If a simple formatting tool wants access to your Gmail or all of Drive, look for an alternative.
• Check who publishes it. The listing shows the developer and a link to their privacy policy and support pages.
• Prune regularly. Uninstall add-ons you no longer use so they stop holding access to your files.

On Google Workspace accounts, admins have more control than individual users. Google’s Admin Help explains that administrators can mark third-party apps as trusted, limited or blocked, restrict high-risk access scopes for services including Drive and Docs, and see a Google-verified badge on apps that passed Google’s OAuth verification. New users generally cannot install unverified, restricted apps unless an admin has allowlisted them. If an install fails on a work account with a permissions or “blocked” message, that policy is usually why, and the fix is to ask IT rather than to use a personal account for company documents.

Which add-ons are worth a look?

Roundups of popular Docs add-ons consistently cluster around a few jobs: e-signatures, citations and bibliographies, mail merge and label printing, AI writing help, PDF tools, and publishing a doc straight to a website or CMS. Lists vary from one publication to the next and many are not updated often, so rather than trusting a ranking, search the Marketplace for the job you need done, then compare the top results on permissions requested, recent reviews, and whether the developer is a company you already use.

If a tool you already pay for (an e-signature service, CRM or CMS) offers an official Docs add-on, that is usually the safest choice: you already trust the vendor with your data, and the add-on is more likely to be maintained long term.