Subreddit Blocker is a free Chrome extension developed by subredditblocker. It falls under the category of Browsers, specifically Add-ons & Tools. This extension allows users to block specific subreddits from appearing in their feeds on sites like /r/all and /r/popular.

When browsing reddit.com/r/all or reddit.com/r/popular, users are presented with a variety of "cards" from different subreddits. However, the website itself does not provide a way to customize which cards are displayed. This extension solves that problem by allowing users to add subreddits to a blocklist. Once a subreddit is blocked, its cards will no longer appear in the feeds on these sites.

Subreddit Blocker provides a simple and straightforward solution for users who want to have more control over their reddit browsing experience. With just a few clicks, unwanted content from specific subreddits can be easily filtered out, creating a more personalized and tailored feed.