Free tool · no install · works on your phone
Stack two videos — top/bottom, side-by-side & PiP, free
The reaction-video layout, no editor required: clip ① on top and clip ② on the bottom, side-by-side, or picture-in-picture. Pick whose sound you keep — clip ①, clip ②, or both mixed together.
Preview free · download moves the result into your free Aperture library · 100 MB per file · first 60 s processed
How to stack two videos online
- Drop two videos into the two cards.
- Pick the layout — top/bottom, side-by-side or PiP — and whose audio to keep.
- Press Stack them and preview the combined clip.
Why stack two videos with Aperture
- Vertical stack (720 wide), side-by-side (720 tall), or PiP overlay
- Audio selector: clip ①, clip ②, or both mixed
- Perfect for reaction videos and comparisons
- Free preview, no watermark
FAQ
How long can each clip be?
Files up to 100 MB; the first 60 seconds of each input is used in the stack.
What does 'both' audio do?
It mixes both clips' audio tracks 50/50, so you hear both creators at once — the standard reaction-video sound.
Can I reframe the PiP window?
The free tool pins it top-right. Claim both clips into your library and the Aperture editor gives you full position keyframes.
More free tools
Need the full studio? Open the Aperture editor — timeline, transcript search, guest review, platform exports — free plan included.