Convert MP4 videos to WebM format using VP9 encoding. Smaller file sizes for web use. 100% browser-based.
Drag & Drop MP4 here
MP4 · MOV · Click to browse
1.2 TB
Bandwidth Saved Today
0.4s
Avg Process Time
99.9%
Compression Fidelity
Auto-purge after 60m. Zero logs. Fully encrypted processing.
Advanced alpha-channel preservation for UI designers.
Jump straight into processing without the sign-up friction.
Knowledge Base
WebM is the preferred format for web video. It is open-source, has better compression than MP4 at the same quality, and is required for some HTML5 video implementations.
Minor quality reduction may occur during transcoding. Set quality to High to minimize visible differences. For lossless-equivalent conversion use CRF 18-20.
A 1-minute 1080p video typically converts in 2-3 minutes in the browser using WebAssembly.
Output uses VP9 video codec and Opus audio codec, which are the most efficient and widely supported codecs for the WebM container format.