WebM to MP4 Converter
Convert WebM recordings to universally compatible MP4 files directly in your browser. No uploads required.
Why use our WebM to MP4 converter?
- Runs entirely in your browser - no server upload required
- Your files stay private and never leave your device
- Preserves quality with optimized H.264 encoding
- Converts Chrome and Firefox screen recordings to MP4
- Fast start optimization for instant web playback
- Compatible with all devices and platforms
Frequently asked questions
Is it safe to convert my WebM files here?
Yes. This converter runs entirely in your browser using WebAssembly. Your files are never uploaded to any server - all processing happens on your device.
Why convert WebM to MP4?
WebM is commonly used by Chrome and Firefox for screen recordings, but MP4 is more universally compatible. Converting to MP4 ensures your video plays on any device, browser, or platform.
Will I lose video quality?
The converter uses H.264 encoding with settings that maintain excellent visual quality. For most use cases, you will not notice any quality difference.
What about audio?
The converter preserves audio tracks, re-encoding them to AAC format which is universally supported in MP4 containers.
How long does conversion take?
It depends on file size and your device. A typical 1-minute recording converts in 30-60 seconds.
Can I convert screen recordings from Chrome?
Yes. Chrome saves screen recordings as WebM files by default. This tool converts them to MP4 for wider compatibility. For a better recording experience with built-in editing, try Tight Studio.
Need more than a converter?
Tight Studio is an all-in-one screen recorder and video editor for Mac. Record, edit, and share polished demos in minutes.
- Screen recording with smart auto-zoom
- Built-in video editor with real-time effects
- AI narration and automatic captions
- One-click shareable links
macOS Apple Silicon - Free to start, no credit card required