Video to WebM Converter
Convert videos to WebM format for web use. Optimized for HTML5 video and modern browsers.
Upload your video files in any format and convert them to WebM, the modern web video format. WebM provides excellent compression and quality, making it ideal for websites and HTML5 video players. Uses VP9 codec for video and Opus for audio to ensure maximum compatibility with modern browsers. All processing happens in your browser for complete privacy.
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Supports: MP4, AVI, MOV, MKV, FLV, and all video formats
How It Works
- 1Upload video files
Click or drag and drop your video files in any format. Supports MP4, AVI, MOV, MKV, FLV, and more.
- 2Choose quality settings
Select your preferred quality level. Medium quality provides the best balance between file size and visual quality for most web uses.
- 3Convert and download
Click Convert to WebM and download your converted files. Preview videos before downloading to verify quality.
Frequently Asked Questions
Why convert videos to WebM?
WebM is optimized for web use with excellent compression and quality. It is natively supported by all modern browsers and HTML5 video players. WebM files are typically smaller than equivalent quality MP4 files, making them ideal for web streaming and faster page loads.
What is the difference between WebM and MP4?
WebM uses VP9 video codec and Opus audio codec, providing better compression than MP4 at similar quality levels. WebM is royalty-free and open source, while MP4 uses licensed codecs. Both formats work well for web video, but WebM typically produces smaller files.
Do all browsers support WebM?
Yes, all modern browsers including Chrome, Firefox, Edge, Safari (version 14.1+), and Opera support WebM playback. WebM has become a standard format for HTML5 video on the web.
Are my videos uploaded to a server?
No. All conversion happens directly in your browser using FFmpeg WebAssembly. Your videos never leave your device, ensuring complete privacy and security.
What quality setting should I use?
For most web uses, Medium quality provides the best balance. High quality is recommended for archival or professional content where file size is less important. Low quality works well for background videos or when minimizing bandwidth usage is critical.
How long does conversion take?
Conversion time depends on video length, resolution, and your device performance. VP9 encoding (used by WebM) is more computationally intensive than H.264, so conversion may take longer than MP4. The tool shows progress during conversion.