Do all videos need to be the same format?

For best results, videos should share the same resolution, frame rate, and codec. If they differ, the tool will re-encode to ensure compatibility, which may take longer but produces a seamless result.

Is there a limit to how many files I can merge?

There is no hard limit on the number of files. However, since processing happens in your browser, the total combined file size should stay within your device's available memory — typically under 500 MB total works smoothly.

Will merging videos lose quality?

When videos share the same codec and settings, the tool uses stream copy (no re-encoding) so there is zero quality loss. If formats differ, re-encoding is required but uses high-quality settings to minimize any perceptible difference.

Video Merger

Join multiple video clips into one seamless file. Add videos in order, rearrange if needed, and merge them together — all in your browser.

🔒 100% Privé — pas de téléversement📁 Multiple files🔗 Seamless joining

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Comment utiliser — Video Merger

Upload your video clips

Add multiple video files by drag-and-drop or browsing. Supports MP4, WebM, MOV, AVI, and more.

Arrange the order

Reorder clips in the sequence you want. The final video will play them back-to-back in this order.

Merge and download

Click "Merge Videos" to concatenate all clips into one file. Processing happens locally — download when done.

Questions Fréquentes

How do I merge multiple videos into one?

Upload your clips, arrange them in order, and click Merge. The tool concatenates them using FFmpeg WebAssembly — entirely in your browser, no server upload.

Do all videos need the same format?

For best results, videos should share resolution, frame rate, and codec. Mixed formats trigger re-encoding for compatibility, which takes longer but works.

Is there a limit on file count?

No hard limit on files. Keep total combined size reasonable for your device's memory — under 500 MB total usually works smoothly in-browser.

Will merging lose video quality?

When clips share the same codec and settings, stream copy is used (zero quality loss). Mixed formats require re-encoding with high-quality settings.