---
title: 'Convert AVI to MP4 online (modern, playable video) - OpenClip'
description: 'Convert legacy AVI files into MP4 that works on phones, editors, and social platforms, in your browser. Your video never leaves your device.'
canonical: 'https://openclip.app/tools/avi-to-mp4'
markdown: 'https://openclip.app/tools/avi-to-mp4.md'
---

[Tools](https://openclip.app/tools) Convert AVI to MP4 online (modern, playable video)

# Convert AVI to MP4 online (modern, playable video)

Convert legacy AVI files into MP4 that works on phones, editors, and social platforms, in your browser. Your video never leaves your device.

1

Upload your AVI

Drop any .avi file. Processing happens in your browser.

2

Convert to MP4

The video is re-encoded to modern H.264 MP4.

3

Download the MP4

Save a compact MP4 that plays anywhere.

## Questions & answers

### My AVI is really old, will it even open?

Most common AVI codecs decode fine in the browser. Very unusual or proprietary codecs may not, in which case a desktop encoder is the fallback.

### Does the AVI get uploaded to a server?

No. Conversion runs in your browser, your video never leaves your device, and nothing is stored.

### Will the MP4 be much smaller than the AVI?

Usually yes. AVI files are often large and lightly compressed, so H.264 MP4 typically shrinks them a lot at the same quality.

### Need another target format?

Pick WebM, MOV, or MKV in the [format converter](/tools/video-format-converter).

## Stop editing one clip at a time.

OpenClip finds your best moments, reframes them face-aware for every platform, writes the captions, and posts them. One upload, a week of content.

[Start free](https://openclip.app/register)

### More free tools

Keep editing inside the same browser-only toolkit.

- [Crop for Shorts](https://openclip.app/tools/crop-video-for-youtube-shorts): Crop videos to the YouTube Shorts 9:16 frame.
- [Landscape to Portrait](https://openclip.app/tools/landscape-to-portrait-video): Turn 16:9 video into vertical 9:16.
- [M4V to MP4](https://openclip.app/tools/m4v-to-mp4): Convert Apple M4V files to standard MP4.