Clipstack Security
Source

Free split-screen vertical clip editor

Turn 16:9 gameplay into a 9:16 Short, Reel or TikTok with your facecam on top or bottom. Add text, speed up the slow parts, and export an MP4.

It all runs in your browser. No upload, no watermark, no account.

Load or drop a 16:9 clip to start

Preview 1080×1920

Arrow keys move the box. Ctrl plus arrow keys reshape it, which changes the split. Plus and minus scale it. Hold Shift for bigger steps.

With a text or emoji selected, arrow keys move it and plus and minus resize it. Hold Shift for bigger steps.