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Matching clips are joined without re-encoding, which is fine on a phone. Mixed clips must be re-encoded and are slow — on a phone, keep the total under about 100 MB.
Matching clips are joined without re-encoding, which is fine on a phone. Mixed clips must be re-encoded and are slow — on a phone, keep the total under about 100 MB.
Combine multiple video clips into one file, right in your browser. Reorder, preview, and download — nothing is uploaded.
Drag and drop videos here, or click to browse
MP4, WebM, or MOV · up to 10 files · 200MB total
Add 2 or more videos to get started
Video Merger combines multiple clips into a single video file entirely inside your browser. Reorder clips with a click, and the tool will stitch them together — copying the original quality whenever possible, or re-encoding automatically if your files don't match.
Is my video uploaded to a server?
No. Video Merger runs entirely in your browser using WebAssembly — your files never leave your device.
What video formats can I merge?
You can merge MP4, WebM, and MOV files. You can even mix formats within the same merge.
How many videos can I merge at once?
You can merge up to 10 videos in a single session, with a combined size limit of 200MB.
Why did merging take longer for my files?
When your videos share the same codec, resolution, and frame rate, we copy the streams directly for a near-instant merge. If they don't match, we automatically re-encode everything to a common format so the result plays correctly — this takes longer but avoids playback errors.
Will merging reduce the quality of my videos?
If your clips match in format, we use stream copying, which preserves the original quality exactly. If re-encoding is needed, we use a high-quality H.264 setting to keep visible loss minimal.
Do the videos need to be the same size or format?
No. You can merge videos with different resolutions, frame rates, and formats — the tool detects mismatches and re-encodes automatically so everything lines up in the final file.
All processing happens locally in your browser. Your videos are never uploaded to any server.
Trim and cut video clips with a visual timeline.
Shrink video file size for free, at a quality level you choose
Resize video dimensions with social media presets.
Repeat a video clip a set number of times, or loop it to hit a target duration, in your browser.