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Video Combine
Renders in your browser · server export adds audio
Drop your AI clips here
MP4 or WebM · several at once · editing stays on your device

Video Combine

Combine AI video clips into one MP4 — trim, reorder, change speed, or reverse, then export. Editing and the default export run in your browser; an optional server render handles browsers without WebCodecs and keeps your audio.

Arrange, trim, reverse, retime — then export one MP4

Drop several clips on the timeline, drag to reorder them, drag a selected clip's edges to trim, and right-click for Reverse, Speed, Duplicate or Delete. Speeds run 0.25× to 4× and are baked into the export; reverse re-encodes the frames backwards for real, which is why reversed clips are capped at 15 seconds of source material per export.

MP4, WebM and MOV in — and where the audio goes

Import MP4, WebM and MOV clips, several at a time, by drag-and-drop or the file picker; the result always exports as a single MP4. The in-browser export is video only. "Export on our servers" keeps each clip's audio — filling silence for clips that have none — and also covers browsers without WebCodecs.

No watermark, and nothing uploaded by default

Importing, previewing and the default export all run on your device via WebCodecs, so your clips never leave your computer unless you choose the server render. Exports carry no watermark and no branding overlay — the MP4 contains exactly the frames you arranged on the timeline.

Video Combine — FAQ

What does Video Combine do?
It combines several AI-generated video clips into a single video. Arrange clips on the timeline, reorder them by dragging, trim the ends, change playback speed, or reverse a clip — then export everything as one MP4.

Do my clips get uploaded anywhere?
Not for the default export. Importing, previewing and the in-browser export all happen on your device via WebCodecs — your clips never leave your computer. There is one opt-in alternative: "Export on our servers", which uploads your clips so we can render them for you. It exists for browsers without WebCodecs (Firefox, older builds) and adds an audio track; it only ever runs when you click that button.

Which video formats are supported?
You can import MP4, WebM, and MOV clips — several at once, by drag-and-drop or the file picker. The combined result always exports as a single MP4 file.

Does the exported video include audio?
The in-browser export is video only — any sound in the source clips is dropped. If you need audio, use "Export on our servers": that render keeps each clip's audio (and fills silence for clips that have none) in the finished MP4.

How does reversing a clip work?
Reverse decodes the clip and re-encodes its frames in backwards order during export, so the reversed section plays backwards for real in the final MP4. Because that is decode-and-re-encode work, reversed clips are capped at 15 seconds of source material per export.

What playback speeds can I set per clip?
Each clip can play at 0.25x, 0.5x, 1x, 1.5x, 2x, or 4x — right-click a clip on the timeline to change its speed. The speed change is baked into the exported MP4.

Does the export add a watermark?
No. Exports carry no watermark and no branding overlay — the MP4 contains exactly the frames you arranged on the timeline.

Can I combine clips I made with EZ Video or EZ Animate?
Yes — that's the main pairing. In the Recent Jobs rail on the right, any finished video job has a Timeline button that sends it straight onto the Video Combine timeline, alongside any clips you imported by hand.