File Converter

WebM to AVI converter Free, private, no upload.

Convert WebM files to AVI right in your browser. AVI is still required by some older players, TVs and editing software. Your files are never uploaded.

or drop files anywhere · paste with Ctrl/⌘ + V

How to convert WebM to AVI

  1. 1 Drop your WebM files onto the page, or click “Choose files”. You can add many at once, or a whole folder.
  2. 2 AVI is already selected as the output. Optionally open Options to adjust quality, resolution, frame rate.
  3. 3 Click Convert, then Save. Converting several files? Save them all as one ZIP.

About the formats

WebM · WebM video

WebM is an open video format made for the web, using VP8/VP9 video and Opus or Vorbis audio.

AVI · Audio Video Interleave

AVI is an older Microsoft video format. It is still found on older cameras and in archives.

The conversion runs on your device using FFmpeg compiled to WebAssembly. You can adjust: quality, resolution, frame rate, remove audio, start at, end at.

Frequently asked questions

How do I convert WebM to AVI?

Drop your WebM files onto the page, or click “Choose files”. You can add many at once, or a whole folder. AVI is already selected as the output. Optionally open Options to adjust quality, resolution, frame rate. Click Convert, then Save. Converting several files? Save them all as one ZIP.

Are my files uploaded to a server?

No. The conversion runs entirely in your browser using WebAssembly. Your files never leave your device, so it is safe for private photos, contracts and business data. Once the page has loaded it even works offline.

Will converting WebM to AVI reduce quality?

AVI uses lossy compression, so some detail is traded for a smaller file. At the default quality the difference is very hard to see or hear, and you can raise the quality setting if you need more.

Can I convert multiple WebM files to AVI at once?

Yes. Add as many WebM files as you like; they are converted in parallel on your device and you can download them all as a single ZIP.

Is it free? Are there limits?

It is free, with no sign-up, no watermark and no daily limits. Because nothing is uploaded there is no upload size limit either; the only limit is your device’s memory, which matters mostly for very large videos.

Convert other formats to AVI

See everything the WebM converter and the AVI converter can do.