Video Merger
Runs in your browserCombine multiple clips into one video — fit, fill, stretch, or pad mismatched sizes; choose backgrounds; loop sequences. Browser-based, no upload, no watermark.
Tap to select videosSelect videos to merge
Multiple files · MP4, WebM, MOV
or drag and drop
How It Works
Add your clips
Drop in multiple MP4, WebM, or MOV files. Drag to reorder.
Pick a fit + background
Fit / fill / stretch / pad. Solid color, blurred, or gradient background for letterbox areas.
Export
Download as a single WebM with synchronized audio. No watermark.
Frequently Asked Questions
Is the video merger free?
Yes — free with no signup, no watermark, and no upload cap. Merging happens entirely in your browser, so we don't need to charge for server costs.
Do my videos get uploaded anywhere?
No. The merger uses the Canvas and MediaRecorder APIs to combine clips on your device. Files never touch our servers.
Which formats can I merge?
Any video your browser can decode — typically MP4, WebM, and MOV. You can mix formats; the output is a single WebM file (VP9 + Opus).
Can I reorder clips?
Yes — drag clips to reorder. You can also choose loop modes and background fills (color, blur, gradient).
What if my clips have different sizes?
Pick a fit mode: fit (letterbox to keep aspect), fill (crop to fill), stretch, or pad. The pad areas use your chosen background.
Is there a file size limit?
No hard limit, but combining many large clips depends on your device's RAM. Most phones handle up to ~500 MB comfortably.