File Downloaded Successfully!

Your file is saved and ready. Thank you for using Elixuvo!

🔒 100% Client-Side Processing•Always Fast & Free
Skip to content
Elixuvo

Video Joiner & Merger

Merge multiple video clips into a single video directly in your browser using FFmpeg WebAssembly. Reorder clips, preview files, and join MP4, MKV, MOV, and WebM seamlessly with zero server uploads.

Live

How to use this tool

  1. Upload 2 or more video clips (MP4, MKV, MOV, or WebM) by dragging them into the dropzone or browsing your computer.

  2. Arrange your clips into the desired playback sequence using the Move Up and Move Down controls.

  3. Preview each video clip and review file size and duration metrics.

  4. Select your desired output container format (MP4, MKV, MOV, or WebM) and click Merge Videos.

  5. Preview the final joined video in your browser and download the merged file directly to your disk.

Frequently asked questions

Quick answers about file privacy, processing modes, formats, and device support.

The merger uses FFmpeg compiled to WebAssembly to combine your video files directly within your browser sandbox. It writes the clips to an in-memory virtual filesystem and executes concatenation using stream copy (preserving 100% original quality), automatically falling back to frame-synchronized re-encoding if clips have differing codecs or resolutions.
You can combine MP4, MKV (Matroska), MOV (QuickTime), and WebM video files. You can even join clips of different container types together into a unified output format.
When clips share identical codecs and frame sizes, Elixuvo executes an ultra-fast stream copy concatenation in seconds without re-encoding. If codecs, bitrates, or resolutions differ, our intelligent engine automatically transcodes and normalizes the streams into your selected target format.
Never. All video reading, stream concatenation, and rendering occur 100% locally on your computer inside your browser's WebAssembly sandbox. Your video data never touches the network.
You can merge 2 or more clips. Because processing takes place in your browser's memory, we recommend a combined file size under 500 MB for optimal performance and browser stability.
If your clips have matching codecs, stream copy is used, resulting in zero quality loss. When re-encoding is necessary due to format mismatches, visually lossless H.264/AAC presets ensure crisp clarity and optimal audio synchronization.

Related tools

video
Featured

Video Converter

Convert videos between MP4, WebM, MOV, and AVI in your browser using FFmpeg WebAssembly. No server uploads.

MP4 · MOV · WEBM
Open
video
Featured

Video Compressor

Compress MP4, MOV, and WebM videos in your browser using FFmpeg WebAssembly. Fast, private, with zero server uploads.

MP4 · MOV · WEBM
Open
video
Featured

Video Trimmer & Cutter

Cut and trim MP4, WebM, MOV, and AVI videos directly in your browser using FFmpeg WebAssembly. Stream copy with no re-encoding.

MP4 · MOV · WEBM
Open
video
Featured

Video Resizer & Resolution Changer

Resize and scale MP4, WebM, MOV, and AVI videos directly in your browser using FFmpeg WebAssembly. Convert to 1080p, 720p, 480p, 360p, or custom dimensions with zero server uploads.

MP4 · MOV · WEBM
Open
video
Featured

Video Brightness & Contrast Enhancer

Adjust video brightness, contrast, saturation, and gamma in your browser using FFmpeg WebAssembly. Real-time preview player, one-click color grading presets, and zero server uploads.

MP4 · MOV · WEBM
Open