AVI, Windows’ classic video
AVI is a 1990s Microsoft video format, common in old cameras and old files.
Strengths: Classic desktop players open it.
Limits: Browsers and phones do not play it, and it is usually large; here it is read with ffmpeg.
Video
Convert AVI to Opus
Turn your AVI files into Opus in seconds. Everything happens in your browser: nothing is uploaded to any server.
AVIOpus
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
Why convert AVI to Opus?
Browsers and phones do not play it, and it is usually large; here it is read with ffmpeg. As Opus it takes minimal space with very good quality, ideal for voice and the web.
About the formats
Opus, the most efficient audio
Opus is a modern, open codec that gives very good quality at a very small size, for both voice and music.
Strengths: It is the format of WhatsApp voice notes and video calls, and sounds good even at 96 kbps.
Limits: Some old, car or Apple players do not recognise it.
How to convert AVI to Opus
- 1Drop your AVI files in the box, paste them or pick them from your device.
- 2Check that the target is Opus and open the options if you want to adjust it.
- 3Press “Convert” and download each Opus, or all of them in a ZIP.
Frequently asked questions
Is my AVI uploaded to a server to turn it into Opus?
No. The AVI to Opus conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
Can I extract only part of the AVI audio?
Yes: in the options set the start and end time, for example from 1:30 to 2:45, and only that clip is extracted.
Is there a size limit?
Up to 2 GB and 3 hours of video on desktop; on mobile, 500 MB and 30 minutes (AVI: 1 GB and 1 hour on desktop). If it is over, you are told before it starts and can trim it.
Can I convert several AVI files at once?
Yes. Drop as many AVI files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each Opus or all of them in a ZIP.