Reddit Comment Checker is a free Chrome extension developed by stewartthomson3. It is designed to help Reddit users avoid posting duplicate content by checking for potentially similar comments in a post.

With this extension, you can easily check the top level of all comments in a Reddit post for any similarities. If there are similar comments found, they will be displayed to you, allowing you to upvote them instead of posting duplicate content. This not only helps in reducing redundancy but also promotes engagement and avoids cluttering a post with repetitive comments.

Using Reddit Comment Checker is simple and straightforward. All you need to do is type out your comment and click the "Check for duplicates" button. However, it's important to note that this extension currently only supports the old Reddit design.

If you're an active Reddit user who wants to contribute to a clutter-free discussion environment, Reddit Comment Checker is a valuable tool to have. Give it a try and streamline your Reddit commenting experience.