Convert AVI to WebM
Turn your AVI file into a WebM that plays where you need it, with nothing to install.
- Free to start
- Nothing to install
- Up to 1GB
How to convert AVI to WebM
Upload your AVI file
Drag and drop an AVI file to turn into WebM, or click to browse. Anything under 1GB, and nothing is installed.
Confirm WebM as the output
WebM is already selected, so there is nothing to configure. Switch to another format in the panel if AVI needs to go somewhere else.
Convert and download
We convert the AVI on our servers, usually in under a minute. Create a free account to download the WebM.
Why convert AVI to WebM?
AVI is a Microsoft container from 1992. It still turns up in old archives, camcorder dumps and downloaded footage, but it predates modern compression and has no idea what a phone is.
The practical problem: Phones, browsers and social platforms do not play AVI at all. The legacy codecs inside waste enormous amounts of space compared with H.264. No support for modern features like proper streaming, chapters or clean seeking.
WebM solves that. Streams natively in Chrome, Firefox and Edge with no plugin. VP9 delivers smaller files than H.264 at the same visual quality, which cuts bandwidth on a busy page.
Container
Typical codecs
Best for
Plays on
File size
| Feature | AVI | WebM |
|---|---|---|
| Container | Audio Video Interleave (Microsoft) | WebM (Matroska-based) |
| Typical codecs | DivX, Xvid, MJPEG and other legacy codecs | VP8 / VP9 / AV1 video, Opus audio |
| Best for | Opening archive footage from the 2000s | Web embeds and browser recordings |
| Plays on | Desktop players with the right codec pack | Chrome, Firefox and Edge; hit and miss elsewhere |
| File size | Very large for the quality | Very small at the same quality |
AVI to WebM questions
Is the AVI to WebM converter free?
Yes. Convert and preview the result for free, then create a free account to download it. There is no per-file charge and no watermark on the WebM itself beyond the free-plan badge.
Do I need to install any software?
No. The conversion runs on our servers and you use it from a browser tab, so it works the same on Windows, macOS, Linux, iPhone and Android. Nothing to install at either end. Where AVI plays: Desktop players with the right codec pack. Where the WebM you get back plays: Chrome, Firefox and Edge; hit and miss elsewhere.
Does converting AVI to WebM reduce the quality?
Converting re-encodes the video, so it is not bit-for-bit identical. We encode at a high quality target, which keeps the result visually indistinguishable from the AVI on normal viewing. What changes is the container and the codec. WebM holds: VP8 / VP9 / AV1 video, Opus audio. Converting the same file back and forth repeatedly will eventually show, so keep your original.
How large a file can I convert?
Anything under 1GB per upload, which is more footage in some formats than others. AVI: Very large for the quality. WebM coming back: Very small at the same quality. For anything bigger, trim or compress it first, both are free tools here.
Is my file kept private?
Your upload is processed and then held only as long as your project needs it. Nothing is published, indexed or shared unless you create a share link yourself.
Other formats
Everything else you can do here.
Every conversion for a format
Convert to MP4
Convert to WebM
Convert to AVI
Convert to WMV
Convert to 3GP
Convert to M4V
Convert to MPEG
Convert to GIF
Convert to MP3
Convert to WAV
Convert AVI to WebM now
Free, nothing to install, and the file stays open in a full video editor afterwards.