Merge Videos
Merge and combine multiple video clips into one file.
Trim, crop, compress, convert, rotate, extract frames, merge videos, and replace audio in one seamless flow!
Your files and data are processed locally and never leave your device.
Video Playground
Drop your video here • MP4 · WebM · MOV · AVI · MKV · GIF • Processed locally
What is Merge Videos?
Merge Videos combines multiple independent video clips into a single continuous video file directly inside your browser. Arrange video clips in your desired sequence with drag-and-drop cards and export a single unified video.
Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.
Key Capabilities
- Combines multiple video clips into a single unified video file
- Drag-and-drop timeline card reordering to organize scene sequence
- Seamless audio track concatenation and synchronization
- Fast client-side video composition using HTML5 Canvas and MediaRecorder
- 100% private in-browser execution with zero server uploads
Common Use Cases
How to use Merge Videos
Upload Video Clips
Select all the video files you want to combine.
Arrange Clip Sequence
Drag the video cards to arrange their playback order.
Merge & Download
Click 'Merge Videos' to render and download your unified file.
Download Media Asset
Preview the rendered media in the in-browser player and click 'Download' to save the finished audio/video file locally.
Frequently Asked Questions
Yes. The canvas scales videos to match a consistent target resolution across the merged sequence.
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