Zoom Cut Studio

A Chrome extension for recording a tab, window, or screen and adding animated zooms after the capture.

Install in Chrome

1. Open chrome://extensions.
2. Turn on Developer mode.
3. Click Load unpacked.
4. Select this project folder.
5. Pin Zoom Cut Studio, open it, and choose Open recording studio.

Editing workflow

1. Start a recording and choose a source in Chrome's share picker. For automatic zooms, choose a Chrome Tab. Clicks and typing locations are tracked locally while recording.
2. Finish the recording to open the editor.
3. Move the playhead to the moment where a zoom should begin.
4. Click Add zoom here, set the zoom amount and animation length, then click the preview to choose the focal point. In Manual mode, drag directly across the recorded screen to draw the exact exported zoom area. Move the rectangle or resize it from any corner.
5. Drag a zoom bar to change its start time. Drag its right handle to change how long it remains active.
6. Use the frame buttons or the left/right arrow keys for precise 30 fps placement. Drag anywhere on the timeline to scrub.
7. Enable click rings and keyboard-shortcut highlights if desired.
8. Move the playhead and use Set start or Set end to trim the clip. Choose a playback speed from 0.5× to 2×.
9. Click Export MP4. Rendering happens in real time and downloads when complete.

Format support

The extension exports H.264 MP4 only. When Chrome exposes native MP4 encoding it uses that directly. Otherwise, the bundled FFmpeg WebAssembly encoder converts the locally rendered intermediate file to a genuine H.264/AAC MP4 before downloading it. No recording is uploaded.

All recording and rendering happens locally in the browser. Nothing is uploaded.