Convert WebM Video (.webm) to Audio Video Interleave (.avi) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .webm 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 .avi file when it's ready.
WebM is Google's modern open media container using VP8/VP9/AV1 video with Vorbis/Opus audio. AVI (Audio Video Interleave) is Microsoft's legacy multimedia container from 1992, using the RIFF format with DivX, XviD, MJPEG, or H.264 video paired with MP3 or PCM audio. Converting WebM to AVI bridges modern web video into legacy Windows workflows.
AVI remains required by VirtualDub, AviSynth, many industrial video systems, older set-top boxes, and legacy Windows applications that cannot parse Matroska-based containers or decode VP8/VP9 video. Converting WebM to AVI makes web video accessible to these legacy systems.
Some car entertainment systems and hardware media players from the DivX era only recognize AVI format, making this conversion relevant for personal media library compatibility.
FFmpeg decodes VP8/VP9 video and Opus/Vorbis audio from WebM, then transcodes to XviD (MPEG-4 ASP), DivX, MJPEG, or H.264 in the AVI container. Audio is converted to MP3 or PCM since AVI does not support Opus or Vorbis. The RIFF-AVI structure uses interleaved audio/video chunks with an index for seeking.
Depends on the target AVI codec. XviD and DivX at adequate bitrates produce good results but are less efficient than VP9. MJPEG produces larger files with maximum compatibility. H.264 in AVI offers the best quality but limited legacy player support. At comparable quality, AVI files are typically 20-50% larger than the WebM source.
| Device | WebM | AVI |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
WebM to AVI makes modern web video accessible to legacy Windows systems and hardware players that require Microsoft's container format.
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Fungerar overallt
| No |
8MB free, 50MB Nitro
Valfri webblasare, valfri enhet
| Funktion | WebM | AVI |
|---|---|---|
| Fullstandigt namn | WebM Video | Audio Video Interleave |
| Filandelse | .webm | .avi |
| Bast for | Web optimized | Windows native |