Free Online Video Merger
Combine multiple video clips into one file. Add your videos, drag to reorder them, then merge and download in seconds. All processing happens in your browser — nothing is uploaded anywhere.
Drop videos here or click to browse
MP4, WebM, MOV — add multiple files at once or one at a timeHow to merge videos online
Frequently asked questions
How many videos can I merge?
There’s no hard limit, but merging many large files requires significant browser memory. For best performance keep total video size under 500MB. If you run into memory issues, try merging in smaller batches and then merging the results.
Do the videos need to be the same format or resolution?
No — the tool handles mixed formats. All clips are re-encoded to match the resolution and frame rate of the first clip, so the output is consistent. For the best quality result, use clips with the same resolution and frame rate.
Why is merging slower than other tools?
Merging requires loading all video files into browser memory and re-encoding each one. Processing time scales with the total combined length and resolution of all clips. The more clips and the longer they are, the longer it takes.
Is my video uploaded to a server?
No — everything runs locally using WebAssembly (FFmpeg.wasm). Your videos never leave your device and no data is stored or transmitted anywhere.
What format is the output?
The output is always MP4 (H.264 video, AAC audio) for maximum compatibility. The resolution and frame rate matches the first clip in your list.
