Gemlens is a Chrome extension for Gemini that provides two features: diff and local synchronization. 👉 It provides: ✔️One-click line-level Diff: quickly compare before/after AI changes, highlight additions/deletions/edits for easy review and rollback. ✔️Seamless embedding: Diff view sits in the original editor area without covering or breaking layout. ✔️Local Workspace sync: after authorization, writes online content to a local directory—no manual copy/paste.