Convert 20 Videos to WebM
Batch convert up to 20 videos to optimized, web-ready WebM format. Zero uploads. Download as ZIP.
Drag & Drop up to 20 videos here
or click to browse (MP4, MOV, MKV, AVI)
High-efficiency WebM batch video encoding
The WebM container format (developed by Google) is engineered specifically for fast streaming on the modern web. Compared to standard H.264 MP4 videos, WebM files are typically 25% to 35% smaller without visible loss in sharpness, drastically improving page speed metrics, Core Web Vitals, and mobile data usage.
Converting 20 videos one by one on cloud conversion sites often triggers daily limits or costs costly subscription fees. Our in-browser converter processes up to 20 files directly on your machine's CPU/GPU, preserving your original files and packing the new WebM files into an organized ZIP archive.
Frequently asked questions
Why convert video files to WebM format?
WebM provides significantly smaller file sizes than MP4 at equivalent quality, speeding up website loading times.
Can I convert 20 videos at once in the browser?
Yes. The tool processes up to 20 files sequentially in memory to prevent browser slowdowns or memory exhaustion.
Are my videos uploaded to a cloud server?
No. Encoding executes locally inside your browser tab. No video files leave your computer.
Will original audio tracks be kept in the WebM output?
Yes. Audio is captured and encoded using high-quality Opus compression inside the WebM container.