AVI to MP4

Convert AVI videos to MP4. Large videos can take a few minutes.

AVI to MP4 Converter re-encodes AVI video into widely compatible MP4 (H.264), fixing playback issues in browsers, phones and editors that don't handle AVI well. Files up to 100MB. Large videos can take a few minutes.

Drop your AVI file here

Upload files

Size up to 100 MB

How do I use AVI to MP4?

1
Drop your AVI file into the box above. Files up to 100MB are supported.
2
Click Convert to MP4. Your video uploads over an encrypted connection; larger files can take a few minutes to convert.
3
Click Download MP4 once conversion finishes. The MP4 plays in modern browsers, phones and video editors that struggle with the older AVI codec.

Frequently asked questions

How much does it cost?

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Why convert AVI to MP4?

AVI is an older container that often relies on codecs many phones, browsers and streaming platforms no longer decode well. MP4 with H.264 plays natively almost everywhere, so converting is usually the fastest way to make an old AVI file work again.

How long does conversion take?

Most videos finish in under a minute, but conversion time scales with length and resolution, so a long or high-resolution AVI can take a few minutes. You can navigate away and check back; the file stays available once the job finishes.

Will video or audio quality change?

Video is re-encoded, which is a lossy step by nature, but at typical resolutions the difference isn't visually noticeable. Keep the original AVI if you need a pristine master copy before compressing further.

Last updated: July 8, 2026