Reorder multiple clips
Add up to eight videos, drag cards or use arrow controls to change their order, and preview the selected clip before merging.
Merge videos online for free
Drop a file hereAdd common video formats, reorder the clips, and merge them into one MP4
MP4MOVWebMMKVAVIMPEGTS
Add up to 8 videos. Frame size, frame rate, and encoding are normalized locally in your browser.
orFiles are processed on your device and never uploadedMerge multiple videos into one compatible MP4
Add and reorder multiple clips, normalize their canvas, frame rate, H.264 video, and AAC audio, then merge them into one MP4 entirely in your browser.
Unified canvas and format
Portrait and landscape clips are scaled proportionally, padded when needed, and normalized to one canvas, frame rate, and compatible encoding.
Local H.264 MP4 export
ffmpeg.wasm re-encodes and joins clips in the current browser without uploading source files, adding silent audio when a clip has no track.
Video merging FAQ
Are source videos uploaded while merging?
No. Reading, normalization, audio handling, and MP4 packaging all happen locally in your current browser.
Why does video merging require re-encoding?
Source clips often use different dimensions, frame rates, codecs, and audio layouts. Normalizing them first creates a more reliable and compatible MP4.
Can portrait and landscape videos be merged together?
Yes. Each clip keeps its aspect ratio and is padded to the unified canvas instead of being stretched.
Why do large videos need more memory?
The browser reads and re-encodes every clip on your device. Close other heavy tabs and prefer shorter or lower-resolution inputs when memory is limited.
RouteMarket.ai
Explore RouteMarket AINeed new clips for a sequence?
Create video assets with RouteMarket AI, then return here to reorder and merge them locally.