AVI to MP4

AVI is an older video format from Windows. Many AVI files use Xvid or DivX video, which iPhones, web browsers and many smart TVs cannot play. This AVI to MP4 converter turns them into modern MP4 files with H.264 video that play almost everywhere.

If your AVI already contains H.264 video, it is copied without re-encoding. Older Xvid and DivX video is converted to H.264, which usually also makes the file noticeably smaller.

How to convert AVI to MP4

1. Upload your AVI file with the button or by drag and drop.
2. Choose the quality (Keep original is recommended) and, if you like, a lower resolution.
3. Click Convert and download the MP4 when the progress bar is complete.

Why convert AVI to MP4 here

• Xvid and DivX video is converted to H.264 for playback on every modern device.
• H.264 video inside AVI is copied without quality loss.
• MP3 audio is kept; other audio is converted to AAC when needed.
• Often produces a smaller file than the original AVI.

Why won't my AVI file play on my phone?

AVI is only a container. The problem is usually the video codec inside it: Xvid and DivX (MPEG-4 Part 2) were popular in the 2000s but are not supported by iPhones, web browsers or many apps. Converting to MP4 with H.264 solves this.

Frequently asked questions

Will my AVI to MP4 conversion lose quality?

Re-encoding from Xvid or DivX to H.264 uses high-quality settings, so the difference is not visible in normal viewing. H.264 video is copied without any change.

Why is the MP4 smaller than my AVI?

H.264 compresses video much more efficiently than the older codecs used in AVI files, so the same picture needs less space.

Can I convert AVI from an old camcorder?

Yes. Most camcorder AVI files (MJPEG, Xvid, DivX) are supported. Very old or proprietary codecs may not be.

How long can the video be?

Up to 60 minutes and 500 MB.

Privacy, limits and file safety

Your files are processed on our own server, are never shared with anyone and are deleted automatically 60 minutes after processing. You can upload files up to 500 MB and 60 minutes long. No sign-up, no watermark and no software to install: it works in any modern browser on Windows, Mac, Android and iPhone.

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