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Size up to 100 MB
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Drag & drop your AVI file or click the + button to upload it; 
Wait a few seconds while our tool converts your video; 
Download your MP4 file. It’s also saved to your account. 
AVI was once the go-to video format, but it’s showing its age. Many modern devices and platforms struggle to play AVI files, and the format’s older compression produces unnecessarily large files. When you need to convert an AVI to an MP4, our converter does the work for you — upload your file, and the tool delivers a clean MP4 automatically. Converting avi to mp4 gives you a smaller, more portable video that’s ready for sharing, streaming, or uploading to any platform.
Yes. Our online converter takes your AVI file and re-encodes it as an MP4. The process is fully automatic — you upload the file, and our tool handles the video and audio conversion without any manual setup. The resulting MP4 file plays on virtually every modern device and platform.
Our converter uses high-quality encoding settings to minimize any visual difference between your original AVI and the converted MP4. While some re-encoding is necessary to change formats, the output is carefully optimized so the quality loss is imperceptible to the human eye. For the best results, start with the highest-quality AVI source you have.
Since our tool runs entirely online, you can convert AVI files on a Mac using any web browser — Safari, Chrome, or Firefox. Just open this page, drag your AVI file into the upload area, and download the converted MP4 when it’s ready. There’s nothing to install and no compatibility issues to worry about.
AVI is an older format that many modern devices and platforms no longer support well. MP4 uses more efficient compression, which means your videos take up less storage space while maintaining strong visual quality. MP4 also plays natively on smartphones, tablets, smart TVs, and social media platforms, making it the safer choice for sharing and streaming.
AVI (Audio Video Interleave) was developed by Microsoft in the early 1990s and uses older compression methods. MP4 is a modern container format that supports H.264 and H.265 video codecs, producing smaller files at comparable quality. MP4 also handles metadata, subtitles, and streaming more effectively than AVI, which is why it’s become the standard video format across devices and platforms.
In most cases, yes. MP4 uses more efficient compression than AVI, so the converted file is usually significantly smaller without a noticeable drop in quality. The exact size reduction depends on the codec and settings used in the original AVI, but it’s common to see files shrink by 50% or more after conversion.
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