Video Tools
Video Merger
Merge multiple video files into one seamlessly.
Your files stay on your device - processed locally via WebAssembly, never uploaded
Drop video files or click to upload
MP4, WebM, MOV (2-10 files)
Your videos are processed locally. Nothing is uploaded.
Embed this tool on your website
Copy this code to add the Video Merger to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/video-merger" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Video Merger by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/video-merger">OptiPix Video Merger</a></p>
❤️ Love this tool? Support our team.
No ads, no tracking, no limits. Tips keep 104 tools free for everyone.
Secure payment via Stripe · No account needed
About Video Merger
Last updated: June 2026
OptiPix Video Merger combines 2-10 video files into a single video directly in your browser. Upload videos, reorder them, and merge with automatic format handling. Uses FFmpeg.wasm concat demuxer for fast merging when formats match, or re-encodes for mixed formats. All processing local.
How It Works
FFmpeg.wasm concat demuxer joins videos. Same-format files use -c copy for lossless merging; mixed formats re-encode to H.264+AAC.
Use Cases
- •Combine video clips into one
- •Merge GoPro segments
- •Join interview clips
- •Combine social media clips
- •Merge presentation recordings
You Might Also Like
If you find Video Merger useful, check out these related tools: Video Trimmer, Add Music to Video, and Video Resizer. All tools run entirely in your browser with no uploads or signups required.
Explore more: Browse all tools · Step-by-step guides · Tips & tutorials · Compare tools
Frequently Asked Questions
How many videos?
Different formats?
Quality loss?
Uploaded?
Transitions?
Related Tools
Video Trimmer
Trim and cut video files with precise start/end controls and multiple output formats.
Add Music to Video
Add background music or voiceover to any video with volume mixing controls.
Video Resizer
Resize, crop, and change the aspect ratio of videos for any platform.
Audio Merger
Merge multiple audio files into one with reordering, gap control, and crossfade options.