How to make a split-screen video
Choose two local videos. Select horizontal or stacked layout, landscape/portrait/square canvas, fit or crop, and optional spacing. Shortest ends with the first finished clip; longest keeps the remaining clip playing with a black panel where the other ended. Choose the first audio, second audio, both at 50%, or mute. Preview, export and download.
Formats, quality and device limits
These tools support files your browser can decode. Each video can be up to 250 MB and 10 minutes. Audio-only files can be up to 50 MB and 10 minutes, mono or stereo. MP4 export re-encodes H.264 video at 30 fps; audio-only export produces 16-bit PCM WAV, which may be larger than the source. Video export needs WebCodecs encoding support. Keep the tab open or cancel the current operation.
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