Merge videos online
Join MP4, MOV, WebM or MKV clips into one video — add at least two clips in the order they should play, move them up or down to reorder, and save the result as MP4 or WebM, right in your browser with nothing uploaded. The tool is built for short clips: merging happens on your device, so long videos will take a long time.
Merge Video
Drop your videos here
or
MP4, MOV, WebM or MKV · Up to 200 MB each · Best for short clips
0 bytes uploaded — processed entirely on your device.
Merging videos, simply explained
The tool re-encodes every clip to the size and frame rate of the first clip and then joins them in your order, so clips recorded differently still play as one continuous video. A clip whose shape differs from the first clip is fitted inside that size with black bars, never stretched or cropped. Each clip keeps its own sound, re-encoded in the output format at 128 kbps and 48 kHz (MP4 also to stereo; WebM merges accept mono sound only, so a merge with stereo sound must be saved as MP4), and a clip without sound gets silence in its place so the joined video never loses sync; subtitles are not carried over. Odd first-clip dimensions are rounded down to even numbers, and the result is named after the first clip, with -merged added. Everything runs on your device, which keeps your videos private but means speed depends on your device — short clips merge quickly, while long videos can take a very long time, so this tool is best for short clips.
Private by design.
Your file is processed in your browser and is not uploaded to a server or saved in browser storage. Cloudflare Web Analytics measures page views and performance; it does not receive PDF contents or filenames. Local processing does not guarantee a PDF is safe to open; only open files from sources you trust.