WEBM to AVI Video Converter
Drop your WEBM files — the AVI video is generated in your browser in seconds. Multiple files at once, no upload on the fast path.
9,214+ video files converted
Need your video as AVI? Drop the files and they are re-encoded right on this page — no install, no sign-up, no queue. Typical AVI output is Large, and the work happens locally so your video stays on your machine.
Looking to programmatically convert WEBM to AVI?
Same engine, available as a JSON API. Drop a file or URL via REST and get the converted video back — no browser, no UI, no rate limits on paid tiers.
Fast response on common video pairs
Webhook delivery for batch jobs
Dozens of video format pairs supported
WEBM vs AVI: how they compare
The numbers and capabilities at a glance, so you know what you're trading.
WebM
- Year released
- 2010
- Compression
- VP9 (lossy)
- Transparency
- Yes (alpha)
- Animation
- Yes (video)
- Browser support
- Modern browsers
- Best for
- Web embedding, open source
AVI
- Year released
- 1992
- Compression
- Codec-dependent
- Transparency
- No
- Animation
- Yes (video)
- Browser support
- Legacy players
- Best for
- Old software compatibility
Real WEBM → AVI file sizes
We ran fixed video clips through this exact converter so you can see the typical size impact before converting your own files.
| Video sample | WEBM size | AVI size | Change |
|---|---|---|---|
| High motion | 157.7 KB | 292.6 KB | +86% larger |
| Complex detail | 174.6 KB | 299.1 KB | +71% larger |
Measured on synthetic 3s · 426×240 · 20 fps video clips with this converter on 2026-06-23. Real-world files vary with duration, resolution, codec and content.
Heads up before converting to AVI
What this specific conversion changes about your video.
Lossless when the codecs already fit
If your WEBM uses codecs AVI accepts, we remux (rewrap) it losslessly and instantly. A codec change re-encodes, which recompresses slightly.
Best practices for AVI
Small choices that keep your output sounding right.
- Play the AVI result back before deleting your original WEBM.
- Pick a preset (Web, Mobile, High quality) to balance size and quality for your AVI.
When NOT to convert to AVI
Cases where a different format serves you better.
AVI is a legacy container
AVI is an older, less efficient container. Prefer MP4 unless a specific old tool requires AVI.
The importance of a good video conversion
Why getting WEBM → AVI right matters more than you think.
Frequently asked
The basics everyone asks before dropping a track.
Convert WEBM to other formats
Convert other formats to AVI