Word prediction that is grammar smart and inventive spelling aware. Speech recognition allows you to speak it, and we'll write it.

Co:Writer promo image
What is Co:Writer?

Co:Writer is a featured Edge add-on by Don Johnston Incorporated. This add-on has 79,705 weekly active users and a poor user rating of 1.40. The latest version,, was updated 4 months ago.

Stats date:
Rating: 1.40 (5)
Version: (Last updated: 2022-12-08)
Creation date: 2022-01-21
Manifest version: 2
  • <all_urls>
  • tabs
  • notifications
  • unlimitedStorage
  • contextMenus
  • webRequest
  • webRequestBlocking
  • webNavigation
Size: 37.78M
Risk impact: Very high risk impact
Risk likelihood: Low risk likelihood
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Other platforms

Co:Writer (v4.9.9.595)
105 3,088,558
Not available on Firefox
Co:Writer® Universal Extension for Microsoft Edge helps you write with proper grammar and spelling using topic-specific vocabulary. It integrates with the Edge browser for word prediction just about anywhere you write online including Microsoft Word, Google Drive™, blogs, Learning Management Systems, testing, social networks, and email.

Try it for free and see if it works for you. Pricing and more information can be viewed at 

How Does Co:Writer Work?
As letters are typed, Co:Writer predicts the intended word with a selection of word suggestions using powerful grammar-smart word prediction. These suggestions can be read aloud by moving the cursor over the words. Selecting the intended word places it into the built-in writing document. For feedback while writing (and after writing) built-in text to speech can be used to read letters, words, sentences, and any selected text. 

4+ Million Topic-Specific Dictionaries:
Co:Writer has access to a main prediction dictionary (that includes core words) and Topic Dictionaries (that includes topic specific words).  Co:Writer can access over 4 million topic-specific dictionaries which are activated based on the writing task.

A small sampling of the variety of topic dictionaries:
  ✔ America's Cup
  ✔ Compare and Contrast
  ✔ Dinosaurs
  ✔ Grumpy Cat
See more
Risk impact

Co:Writer requires a lot of risky permissions and is not safe to use. Avoid installing this add-on unless you absolutely trust this publisher.

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, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Co:Writer has earned a fairly good reputation and likely can be trusted.

Risk likelihood measures the probability that an Edge add-on may turn malicious. This is determined by the publisher and the Edge add-on reputation on Edge Add-on Store, the amount of time the Edge add-on has been around, and other signals about the Edge 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 an Edge add-on, especially ones with higher risk impact and/or higher risk likelihood.

Subscribe to the premium plan to see more risk analysis details
User reviews
I've found the page that gives payment information. they're are other tools also. when you go to create account then it will ask you for a key code to sign in, you will then click on 7 day free trial this will give you access to the app. it's not a bad app I guess but if your really interested in this app and its functionality then you'll need to purchase a plan monthly. not bad prices either starts a 3.99 a month and up.
by Donna, 2023-03-01

I absolutely agree with the other commenters. I've reached out to these guys on Facebook. And other platforms and they're not responding. If they're not going to make their product available to the public sector, then why is it on the edge store?
by michael, 2022-08-23

had to shut down computer because microsoft is trash and me trying to reopen it caused me to lag or crash
by Roman, 2021-03-16
View all user reviews
Promo images
Co:Writer marquee promo image
Marquee promo image