Convert AVI to MP4
Convert AVI to MP4 online for free. Simply drop your AVI files below to convert them to MP4 in seconds.
- Free Converter
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Add files
Drop files anywhere on the page or paste them with Ctrl+V / ⌘+V
How to convert AVI to MP4?
Add AVI files
Drag and drop files onto the page or click the upload area. You can add several files at once.
Choose MP4 and settings
Pick the target format and, if needed, adjust quality, size and other options.
Download the result
Conversion runs right in your browser. Download files one by one or all at once as a ZIP archive.
Converting AVI to MP4: what to know
AVI is an old video format that many movies and recordings from older cameras still come in. Phones, TVs, browsers and social networks handle MP4 much better, so AVI is converted to it.
Video from AVI is always re-encoded to H.264, the most compatible codec for MP4. The re-encoding runs right in your browser, so a long movie takes longer than a short clip, and the speed depends on your device.
While converting, you can trim the video, change the resolution, rotate the picture or remove the sound.
AVI or MP4: which to choose?
AVI (Audio Video Interleave)
AVI is a 1992 Microsoft video container that holds old films and camera recordings.
Best for old video archives and programs that accept only AVI.
MP4 (MPEG-4 Part 14)
MP4 is the most compatible video format: it plays on phones, TVs, browsers and social networks.
Best for publishing and sending videos - maximum compatibility at a reasonable size.
What happens when converting AVI to MP4
If the codecs inside AVI are supported by MP4, the tracks are copied without re-encoding - quickly and without quality loss. Otherwise the video is re-encoded with the codec, bitrate, resolution and frame rate you choose.
You can also trim the video, rotate or flip it and remove the sound.
AVI files up to 2 GB are supported; the actual limit also depends on the free memory of your device.
AVI and MP4 compared
Convert AVI to other formats
Convert other formats to MP4
What else you can do with AVI
Frequently asked questions
How do I convert AVI to MP4?
Add AVI files above - MP4 is already selected as the target format. Adjust the settings if needed, start the conversion and download the MP4 files.
Can I change the MP4 quality?
Yes. Set the quality from 1 to 100 in the file settings: the lower the value, the smaller the file.
Why does AVI take long to convert?
The video from AVI is re-encoded to H.264 from scratch. Your device's processor does this work, and on long files it takes time.