Is Grammarly: AI Writing Assistant and Grammar Checker App safe to install?

What data it declares

The developer declares that it collects these kinds of data:

• Personally identifiable information such as name, address, email address or age
• Personal communications such as emails, texts or chat messages
• Location such as region, IP address or GPS coordinates
• User activity such as clicks, scrolling, keystrokes or network monitoring
• Website content such as text, images or links on the pages you open

The developer also certifies that your data is not sold to third parties outside approved uses, not used for purposes unrelated to the extension's core function, and not used to decide creditworthiness or lending.

The listing links to a privacy policy.

This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

What Chrome asks you to allow

When you add it, Chrome asks you to allow it to:

• Read and change all your data on all websites
• Read your browsing history
• Display notifications

Derived from the manifest by Chrome's documented rules; the dialog's exact wording depends on your Chrome version and language. Chrome asks again if an update requests more.

What it can reach

Every site you visit. This extension can read and change the content of any page you open. What access to every site means

Reaches your browsing data or every site

• Read and change cookies on the sites it can access cookies
• See the address and title of every tab you have open tabs

Worth knowing

• Sign you in with a Google account identity
• Run its own code on the pages it can access scripting

Routine for an extension

• Show you notifications notifications
• Open a panel beside the page sidePanel
• Store data in your browser storage

Pages it runs its code on

It runs its own code on every page you open: the manifest declares a content script for all sites.

• <all_urls> every site
• *://docs.google.com/* only docs.google.com
• *://*.atlassian.net/* atlassian.net and all its subdomains

We keep the first 50 patterns of a list; the manifest may declare more.

A content script is code the extension injects into pages matching these patterns. On those pages it can read and change what you see, whether or not a host permission is listed above.

What it may ask for later

Not granted when you add it: Chrome asks you the moment the extension requests one of these, and you can refuse.

• Read what you have copied clipboardRead
• Talk to an application installed on your computer nativeMessaging

Sites that can connect to it

Web pages matching these patterns can open a messaging channel to it: 1 site pattern.

• https://*.grammarly.com/* grammarly.com and all its subdomains

Declared as externally connectable in the manifest: a page on these sites can exchange messages with the extension, for example to tell it you have signed in. It does not give the page access to your browser.

How usual this is for its category

In Productivity · Communication, 14% of extensions ask for access to every site. This one: Access to every site.

The typical extension there declares 3 browser permissions; this one declares 7 browser permissions.

• Read and change cookies on the sites it can access (cookies): 5% of extensions in this category ask for it.
• See the address and title of every tab you have open (tabs): 26% of extensions in this category ask for it.

Counted over the live extensions of the same category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Who uses it and how it is kept up

41.0M users

• Last updated in the store 2 days ago, on 2026-10-26.
• We have seen 10 new versions in the last 90 days.

What the store shows

• Featured The store's badge for extensions that follow its recommended practices for Chrome extensions.
• Established publisher The store's badge for publishers with a good record and no history of violations.
• Trader The publisher has declared itself a trader under EU rules.

Has it asked for more over time?

This is the question a permission list on its own cannot answer. An extension that shipped narrow and widened later is a different proposition from one that always asked for the same thing.

The permissions this extension requests have not changed since we started watching it.

Versions we have seen

1. 2026-10-26Version 14.1342.0
2. 2026-10-23Version 14.1341.0
3. 2026-10-22Version 14.1340.0
4. 2026-10-20Version 14.1339.0
5. 2026-10-15Version 14.1338.0
6. 2026-10-13Version 14.1337.0
7. 2026-10-07Version 14.1336.0
8. 2026-10-05Version 14.1335.0

Who publishes it

Grammarly, who publishes 2 listings we track. This listing has been in the store since 2012-10-22 and was last updated on 2026-10-26.

Similar extensions that ask for less

Listings close to this one in what they say they do, which declare less reach. Less reach is not a verdict on either: compare what each needs for the job.

1. JustDone: GPT-4o AI Writing Assistant & Grammar Checker Runs its code on every site · 3 permissions 200k users ★ 3.7
2. SmartWrite No site access · 3 permissions 3 users (last published figure)
3. Help Me Write - Grammar Checker and Paraphrase Tool for Google Chrome™ Runs its code on every site · 4 permissions 360 users ★ 5.0

How to check or remove it in Chrome

1. Type chrome://extensions in the address bar and find the extension in the list.
2. Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
3. To uninstall it, choose Remove on the same page.

Questions people ask

What can Grammarly: AI Writing Assistant and Grammar Checker App access?

Every site you visit. This extension can read and change the content of any page you open. It declares 7 browser permissions.

What data does Grammarly: AI Writing Assistant and Grammar Checker App collect?

The developer declares that it collects these kinds of data: Personally identifiable information, Personal communications, Location, User activity, Website content. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has Grammarly: AI Writing Assistant and Grammar Checker App asked for more permissions over time?

The permissions this extension requests have not changed since we started watching it.

Does Grammarly: AI Writing Assistant and Grammar Checker App publish a privacy policy?

Yes, the store listing links to a privacy policy.