How to merge videos
- Click Add videos and choose all the clips you want to join (MP4, MOV, WebM).
- Drag them into order with the arrows, and trim each clip with its Start and Length fields.
- Pick the output shape — it's set automatically from your first clip — and a transition, or keep hard cuts.
- Optionally add background music, captions or a title card.
- Click Create MP4 video and download the merged file.
Tips for a smooth result
- Clips from different phones often have different sizes. Whole picture keeps each clip complete over a blurred background; Fill frame crops to fill the screen.
- Use Split to cut out a middle section: split twice, then remove the part you don't want.
- Lower or mute a clip's volume when you add music, so speech and music don't clash.
- Choose 25 or 30 fps for phone videos; 60 fps only if your clips were recorded at 60 fps.
Private by design
Your videos are joined on your own device — nothing is uploaded, and there's no watermark or sign-up. To turn photos into a slideshow instead, use the video maker, or make a vertical video with the reel maker.
Frequently asked questions
Can I merge videos of different sizes or from different phones?
Yes. Every clip is fitted into one output frame — landscape, vertical or square, chosen automatically from your first clip. Choose “Whole picture” to add a soft blurred background instead of cropping.
Is the original sound kept?
Yes. Each clip keeps its own audio, with a volume slider and mute per clip. You can also add background music from your device or the built-in music library.
Are my videos uploaded?
No. Videos are joined on your device using your browser's built-in video encoder, so even large or private clips never leave your phone or computer.
Which browsers are supported?
The latest Chrome, Edge and Safari on computers and Android phones. Long or 4K videos need more memory — close other tabs if your browser slows down.
Last updated: 24 September 2026Suggest an improvement · Report a problem