Co:Writer icon

Co:Writer

by Texthelp Inc. · cowriter.com · Accessibility
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

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

Users
1M
0 in 30 days
Rating
2.7 / 5
−0.10 in 30 days
Ratings
83
+1 in 30 days
Store rank
#382
#357 among extensions
Version
5.0.10.844
updated 9 Dec 2025

Users

monthly, 3 years
02M4MAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 1,000,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
2060101Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 83 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Co:Writer

Co:Writer® Universal Extension for Chrome™ helps you write with proper grammar and spelling using topic-specific vocabulary. It integrates with the Chrome™ browser for word prediction and speech recognition just about anywhere you write online including Google Drive™, Microsoft Word, 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 https://cowriter.com 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. If the microphone is chosen, you can speak and we'll convert your speech into 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 ✔ History of the Peloponnesian War ✔ Mahatma Gandhi ✔ My Dog ✔ Pig Latin ✔ SpongeBob SquarePants ✔ Tommy (album) ✔ Wonders of the World Spelling Support: Co:Writer uses Flexspell™ technology to handle the widest range of spelling mistakes including phonetic spelling and inventive spelling errors (letter omissions, word ending omissions, letter reversals, etc). Examples of how Co:Writer aides with phonetic and/or inventive spelling: Before Co:Writer: The blk jargon flu over the bra lfnt. R u hpy to ce me? I no hw to nor the fone. After Co:Writer: The black dragon flew over the gray elephant. Are you happy to see me? I know how to answer the phone. Grammar Support: Co:Writer bases its prediction on proper grammar, and uses its understanding of grammar to accurately predict words within the framework of valid sentence structures. Examples of how Co:Writer aides with grammar: Dogs are furry. (noun, verb, adj.) - When you typed d-o, you get plural noun choices Three very mangy dogs ran down the street. (adj., adv., adj., noun, verb… etc.) - After typing three, very, mangy, you get plural noun choices, then you get plural verb tenses.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%0−0.08
30 days0+0.0%+1−0.10
6 months−1M−50.0%0−0.11
1 year+1M–+1−0.13

Chrome Web Store search rankings

Where Co:Writer appears when people search the store, with the 30 day change
Search phrasePosition30 days
writing#20+11
grammar and spell#58−2
topic#74−2
spelling#95−8

Version history

63 versions recorded
5.0.10.8449 Dec 2025
5.0.9.83727 Nov 2025
5.0.7.8286 Nov 2024
5.0.6.82417 Oct 2024
5.0.5.81926 Sep 2024
5.0.4.81624 Sep 2024
5.0.3.8072 Sep 2024
5.0.2.80425 Jun 2024

Details

Category
Accessibility
First seen
6 Jun 2020
Size
36.7 MB
Languages
en
Pricing
Free
Privacy policy
login.donjohnston.net
Support
help.donjohnston.net
Extension ID
ifajfiofeifbbhbionejdliodenmecna

Permissions and risk

Moderate riskimpact 4, likelihood 1
Permissions
tabsscriptingnotificationsstorageunlimitedStoragecontextMenuswebRequestwebNavigationoffscreen
Site access
http://*/*https://*/*
Can read and change data on every website you visit.

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