Convert AVI to MP4
Convert AVI video files to modern MP4 format. Runs entirely in your browser — no upload, no waiting, no watermarks.
Drop files here or click to browse
Max 10240.0 MB per file · drop multiple for batch
100% private — files never leave your device
·Free — no sign up, no watermark
Have feedback? Let us know
How to Use Convert AVI to MP4
- Upload your AVI file
- MP4 is already selected as the output format
- Click Process to convert using H.264 encoding
- Download the smaller, modern MP4 file
Features
- Convert AVI to MP4 with modern H.264 encoding
- Reduce file size — MP4 is typically 2-5x smaller than AVI
- Process files of any size directly in your browser
- No sign-up or installation required
Frequently Asked Questions
- How do I convert AVI to MP4?
- Upload your AVI file, ensure MP4 is selected as the output format, and click Process. The conversion happens locally in your browser.
- Will the file size decrease?
- Usually yes. AVI files often use older, less efficient codecs. Converting to MP4 with H.264 typically reduces file size by 50-80% with similar visual quality.
- Can I convert AVI files from old cameras?
- Yes. This tool handles legacy AVI codecs like DivX, Xvid, and MJPEG, converting them to modern H.264 MP4 that plays on any device.