Convert AVI to MP4
Give old DivX, Xvid and camcorder AVI files a second life as MP4. Convert in your browser and play the result on modern phones, TVs and video editors.
- MP4
- MOV
- AVI
- VOB
- Runs in your browser
- 100% free
- Private
How to convert AVI to MP4
Select the AVI file
Drop your .avi file onto the page, or click to browse for it.
Start the conversion
Click Convert to MP4. The picture is re-encoded to H.264 and the sound to AAC on your own computer.
Check and download
Play the preview on the page. If it looks right, download the MP4.
Why people use Adapterry
Nothing is uploaded
Your videos are processed in your browser and never leave your device.
No account needed
Open the page and start. No email, no password.
No watermark
Your MP4 comes out clean, with no logo stamped on it.
Works offline
Once the page and video engine have loaded, you can keep working without an internet connection.
Supported formats
Add MOV, AVI, VOB or MP4 files, or a mix of them. You always get back one MP4 with H.264 video and AAC audio.
What's inside an AVI file
AVI is an older video format from the Windows PC era, and many camcorders and digital cameras saved video as AVI too. The file is a container, and the video inside is often DivX or Xvid (MPEG-4 Part 2) with MP3 sound.
Those codecs are the reason AVI files fail to play on iPhones, many smart TVs and video editors. Adapterry always fully converts AVI to H.264 and AAC, which those devices handle well.
Questions and answers
What is a DivX or Xvid AVI?
DivX and Xvid are older video codecs based on MPEG-4 Part 2. They were common in AVI files in the 2000s and are poorly supported on modern devices.
How long does AVI to MP4 conversion take?
It depends on the video's length and your computer's speed. Short clips finish quickly, while a full-length film can take several minutes or more, so keep the tab open.
Can I convert AVI to MP4 on a Mac?
Yes. Open Adapterry in a browser on your Mac and drop the AVI file in. No extra codecs or apps are needed.
Will the MP4 keep the original AVI frame size?
Yes, up to 1920x1080. Larger videos are scaled down to fit, and frame rates over 60 fps are capped at 60.
Can I convert AVI files without an internet connection?
Yes, once the page and video engine have loaded. After that you can disconnect and keep converting.