Convert XviD to WebM — Free Online Converter
Convert XviD MPEG-4 Video (.xvid) to WebM Video (.webm) online for free. Fast, secure video conversion with no watermarks or registration....
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Works Everywhere
Any browser, any device
How to Convert
Upload your .xvid file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .webm file when it's ready.
About XviD to WebM Conversion
XviD is the open-source MPEG-4 Part 2 codec that emerged from the community's reverse-engineering of DivX — its name spelling DivX backwards as a philosophical statement. Scene release groups standardized on XviD for encoding DVD rips into the iconic 700 MB CD-rip format, creating the dominant video distribution standard of the peer-to-peer era. These AVI files with MPEG-4 ASP video and MP3 audio circulated across the internet before H.264 and modern streaming made them obsolete.
WebM is Google's open-source video container format, built on the Matroska container and using VP8, VP9, or AV1 video codecs with Opus or Vorbis audio. WebM is the native video format for YouTube, Chrome, Firefox, Edge, and the open web. Converting XviD to WebM transitions content from the first generation of open-source internet video to the current generation — from the scene release era to the streaming era.
Why Convert XviD to WebM?
WebM is the standard for royalty-free web video. Every major browser supports WebM natively, YouTube serves content in WebM, and Google's entire web video infrastructure is built on the VP8/VP9/AV1 codec family. XviD in AVI has no web playback capability — browsers cannot decode MPEG-4 Part 2 in AVI containers. WebM makes the content instantly playable via the HTML5 video element.
VP9 (WebM's primary codec) is dramatically more efficient than MPEG-4 Part 2. A typical XviD scene release at 800-1200 kbps can be matched in visual quality by VP9 at 400-700 kbps. This means your XviD collection can be converted to WebM at half the file size while maintaining equivalent visual quality — modern codec science has advanced enormously since the XviD era.
Common Use Cases
- Converting XviD scene releases for native playback in web browsers via HTML5 video
- Preparing XviD content for upload to platforms that prefer or require WebM (YouTube, web applications)
- Building a web-optimized video library from legacy XviD collections for streaming on personal websites
- Creating open-source web video assets from XviD sources for projects that avoid patent-encumbered codecs
- Reducing XviD file sizes by 40-60% through VP9 re-encoding while maintaining visual quality
How It Works
FFmpeg decodes the XviD MPEG-4 Part 2 video from the AVI container and re-encodes it using libvpx-vp9 (VP9) or libvpx (VP8). Audio is transcoded from MP3 to Opus (the modern standard for WebM audio) or Vorbis (for older browser compatibility). VP9 encoding uses constrained quality (CQ) mode with target bitrate for optimal rate-distortion performance. The WebM container (a Matroska subset) supports cues-at-front for efficient web seeking.
Quality & Performance
VP9 significantly outperforms MPEG-4 Part 2 in compression efficiency. XviD scene releases at 800-1500 kbps can be matched in visual quality by VP9 at approximately 50-60% of the original bitrate. At matched file sizes, VP9 produces noticeably cleaner video with fewer blocking artifacts and better motion handling. AV1 pushes efficiency even further but encodes much more slowly. Opus audio at 128 kbps matches or exceeds the quality of the typical XviD scene release MP3 at 128-192 kbps.
Device Compatibility
| Device | XviD | WebM |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No | Native |
Recommended Settings by Platform
YouTube
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
TikTok
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Twitter/X
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Discord
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
Tips for Best Results
- 1Use VP9 with CQ (constrained quality) mode at CRF 30-33 for web-quality video from XviD sources
- 2Choose Opus at 128 kbps for audio — it matches XviD scene release MP3 quality in a smaller, more efficient format
- 3Enable row-based multithreading for VP9 encoding to significantly reduce conversion time on multi-core systems
- 4Add WebM cues at the front of the file for instant seek capability in web browsers
- 5For very large XviD collections, VP8 encoding is 3-5x faster than VP9 with only a modest compression penalty
XviD to WebM conversion bridges two generations of open-source internet video — from the scene release era's community codec to Google's modern royalty-free streaming standard — with significantly better compression and native web playback.