What's That Course? icon

What's That Course?

by Will Rosenthal · Tools
Manifest V3 Free
View in Chrome Web Store Data as of 21 Oct 2026

Search for Cornell University courses by their course codes.

Users
14
+1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#177K
#148K among extensions
Version
1.0
updated 6 Aug 2024

Users

monthly, 2 years
0714Aug 2024Oct 2025Oct 2026
Latest, 21 Oct 2026: 14 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
001Aug 2024Oct 2025Oct 2026
Latest, 21 Oct 2026: 0 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 What's That Course?

Have you ever found yourself staring at random course codes on Ed Discussion, reading through a list of course prerequisite codes, or browsing course reviews on the r/Cornell subreddit? Despite knowing the subject, you're left without the course title, forcing you to open up the Class Roster and search the code yourself. Introducing "What's That Course?" - your handy tool for instantly decoding Cornell course codes right in your browser. This Chrome extension is designed to save you time and effort by providing quick access to course titles directly from any webpage. No more manual searches or switching tabs; simply highlight the course code, and let "What's That Course?" do the rest! With "What's That Course?," you can instantly look up Cornell course titles by highlighting any course code. The extension integrates seamlessly into your context menu, allowing you to right-click on any selected course code to search directly. You can also use the extension's popup to manually enter and search for course codes. As an added convenience, hovering over highlighted course codes will display their titles in a tooltip without leaving the page. To highlight all the courses on your page automatically, simply press the Detect Courses button in the extension's popup. This will scan the page for any course codes and highlight them for you, making it easier than ever to find the information you need. This extension is perfect for use on Ed Discussion, Reddit, and more. Save time and streamline your academic planning with "What's That Course?" No more guessing, no more switching tabs - just the information you need, right when you need it. Developed by Will Rosenthal.

Growth

WindowUsersChangeRatingsRating
7 days+1+7.7%00.00
30 days+1+7.7%00.00
6 months+5+55.6%00.00
1 year+8+133.3%00.00

Chrome Web Store search rankings

Where What's That Course? appears when people search the store, with the 30 day change
Search phrasePosition30 days
course#24+10

Version history

1 versions recorded
1.06 Aug 2024

Details

Category
Tools
First seen
6 Aug 2024
Size
34 KB
Languages
en
Pricing
Free
Privacy policy
willrosenthal.github.io
Extension ID
amnpkieecicdklmhdjjhfhjflkfphmag

Permissions and risk

Minimal riskimpact 0, likelihood 2
Permissions
storagecontextMenusscriptingcommandsactiveTab

Alternatives to What's That Course?

Extensions that rank for the same store searches or share the Tools category, ordered by users