Ratiogram is a free Chrome extension developed by sjthouvenot. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This extension offers a unique feature that converts the number of likes on each Instagram post into a percentage based on the uploader's follower count. For instance, if a user with 1,000 followers receives 100 likes on a post, Ratiogram would display "10.00% likes/followers" beneath the post.

In addition to the likes-to-followers conversion, Ratiogram also calculates a user's follower count into a ratio based on the number of users they are following and those who are following them. For example, if a user with 1,000 followers is following 100 other users, their account page would show a "follower ratio."

Ratiogram is an intriguing extension that provides Instagram users with a new perspective on their likes and followers. It offers a unique way to measure engagement and followership on the platform.