Convert WebM videos — including browser screen recordings and VP9 files — to the universally compatible MP4 format directly in your browser — free, private, and no installation required
A fast, free, and private way to convert WebM videos to MP4 — entirely in your browser with no uploads and no quality loss.
The entire conversion runs locally in your browser. No server uploads, no processing queues — your files stay on your device at all times.
Most browser-based screen recorders, Chrome extensions, and MediaRecorder tools output WebM files. Cap's converter handles VP8 and VP9 WebM files and turns them into shareable MP4s.
The output is a standard H.264 MP4 file that plays on iPhones, Android phones, smart TVs, and every video hosting platform including YouTube, Vimeo, and Google Drive.
Your video files never leave your device. Unlike other online converters that upload your content to remote servers, all processing happens client-side.
No software downloads, browser extensions, or accounts required. Just open the page and start converting — works instantly in Chrome, Edge, and Brave.
Convert as many WebM files to MP4 as you need with no daily limits, no watermarks, and no hidden fees.
Record, edit, and share video messages with Cap. 100% open source and privacy focused. Records directly to MP4 — no conversion needed.