Combining video clips into a unified video file used to require uploading gigabytes of sensitive video footage to remote servers or installing heavy desktop editing software. RiazHub’s Browser-Based Video Joiner / Merger revolutionizes video editing by executing 100% of video decoding, aspect ratio standardizing, track concatenation, and stream encoding directly inside your web browser via client-side WebAssembly (FFmpeg WASM) and Web Audio API. Whether you are stitching MP4, WebM, MOV, AVI, or MKV clips for YouTube, Instagram Reels, TikTok, or business presentations, your video files never leave your device.
Browser Video Joiner & Merger
Merge multiple video clips into one seamless video standardizing resolutions & aspect ratios. Completely free and private.
100% Privacy-First Client-Side Processing with Audio Retention
Drop multiple video files here or click to browse
Combine MP4, WebM, MOV, AVI, MKV, FLV files instantly without uploading to servers
MP4
WEBM
MOV
AVI
MKV
FLV
Canvas Standardizer & Export Settings
Uniformly rescales all video clips to matching dimensions
Controls how videos with different aspect ratios are fitted
Select final merged output file format
Lossless copy is ultra-fast but requires identical codecs & sizes
Manage sound output across merged clips
Initializing processing engine...
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> Ready for processing...