AVI to MP4 Converter: Free, Fast and No Upload
Drop in a AVI file and get a MP4 back. Convert AVI to MP4 to shrink old, large AVI files and make them playable on modern phones and platforms. Everything runs on your own device, so your video is never uploaded.
MP4 plays almost everywhere. WebM suits websites. MOV suits Apple devices.
How to use the AVI to MP4
- Drop your AVI file onto the converter.
- Check that MP4 is selected as the output format.
- Press Convert to MP4, preview the result and download it.
What is AVI?
AVI is an older Microsoft container. Files are often large and encoded with older codecs. It plays on older players and some desktop software. Phones and modern platforms usually reject AVI, and files tend to be big.
What is MP4?
MP4 is the most widely supported video format. It plays on phones, computers, TVs, browsers and every social platform. It plays on practically everywhere. It is a lossy format, so a re-encode always trades a little quality for size.
Frequently asked questions
How do I convert AVI to MP4 for free?
Open the converter, drop in your AVI file, press Convert to MP4 and download. It is free with no watermark and no sign up.
How much smaller will an AVI be as MP4?
Often 50 to 80 percent smaller, since MP4 with H.264 is far more efficient than older AVI codecs.
Is my AVI file uploaded anywhere?
No. The conversion runs in your browser on your own device, so the file never leaves it.
Does converting reduce quality?
The video is re-encoded at high quality, so for normal viewing the difference is not noticeable. Converting never improves quality beyond the original.