YouTube Check

Marks YouTube videos you've rated (Like or Dislike) with a Viewed badge on thumbnails across the platform.

YouTube Check helps you avoid re-watching videos you've already rated on YouTube. HOW IT WORKS • Open any YouTube video and give it a Like or Dislike • The extension saves your rating locally in your browser • While browsing Home, Search, Channels, Playlists, Shorts, and more, rated videos show a "✓ Viewed" badge on thumbnails FEATURES ✓ Automatic Like/Dislike detection ✓ Configurable badge or overlay on thumbnails ✓ Full YouTube Shorts support ✓ Floating page counter (viewed/total on the current listing) ✓ Watch page indicator ("You already rated this video") ✓ Popup with statistics and recent history ✓ Export and import your data (JSON) ✓ Settings synced across devices via Chrome Sync ✓ English and Portuguese interface PRIVACY • No data is sent to external servers • Everything is stored locally in your browser • You can clear your history at any time from the extension popup Perfect for anyone who watches a lot of YouTube and wants to quickly see what they've already rated.