X Unfollower

The extension is built around filters rather than blind mass-unfollowing. You open your own X profile and click the “Open X Unfollower” button; X Unfollower then scans the accounts you follow and narrows them down using criteria you set — for example, a maximum number of inactive days or a minimum follower count. You decide the thresholds, so the resulting list only contains the accounts you actually consider clutter.

Once the list looks right, you can clear it in a single bulk action or work through it individually. Two safeguards make it practical for real accounts: a switch to protect anyone who follows you back, so reciprocal relationships are never removed by accident, and the option to exclude accounts by other filters before acting. The same engine works in reverse — open someone else's profile, click “Open X Follower”, and follow accounts that meet your own criteria.

X Unfollower has been on the Chrome Web Store for years and is published by the xtensions.pro team, with a listed version 5.1 and roughly 3,000 users. The developer states that the extension does not collect or sell user data, and it currently sits at a 3.5-star average from 44 ratings.