Convert AVI to MP4 Free Online
Modernize your AVI videos into compact, universally compatible MP4 format for any device. Private, instant, and free.
Drag & drop AVI files here
or click to browse · up to 10 files at once
About This Conversion
AVI (Audio Video Interleave) is a multimedia container format created by Microsoft in 1992. While it was the dominant video format for over a decade, AVI files tend to be large and lack modern features like streaming support and advanced compression. MP4 (MPEG-4 Part 14) is today's standard video format, offering superior compression with H.264 or H.265 codecs while maintaining excellent quality. An AVI to MP4 converter helps you bring legacy video collections into the modern era. Many people have archives of AVI files from older camcorders, downloaded media, or legacy video projects that need to be converted for current devices and platforms. Converting AVI to MP4 typically reduces file sizes dramatically — often by 50-80% — while improving compatibility with smartphones, tablets, smart TVs, and web platforms. Our free AVI to MP4 converter handles the conversion entirely in your browser for complete privacy.
Why Use This Converter?
- Dramatically smaller files — MP4 with H.264 compression produces files that are typically 50-80% smaller than equivalent AVI files, saving significant storage space.
- Modern device support — MP4 plays natively on every smartphone, tablet, smart TV, and computer made in the last decade, while AVI support is increasingly limited.
- Streaming capability — Unlike AVI, MP4 supports progressive download and adaptive streaming, making it suitable for web playback and video hosting platforms.
- Social media compatibility — All major social platforms accept MP4 uploads. AVI files are often rejected or require platform-side transcoding that can reduce quality.
- Metadata support — MP4 supports rich metadata including title, artist, album art, and chapter markers that AVI cannot store, helping you organize your video library.
How to Convert
Converting AVI to MP4 takes just three simple steps:
- Upload your AVI files — Drag and drop your AVI videos into the converter above, or click to browse your files. You can convert up to 10 files at once.
- Adjust settings — Choose your preferred quality level to control output file size and visual quality. Your files are processed entirely in your browser for maximum privacy.
- Download your MP4 files — Click download on individual files or grab all converted videos as a single ZIP file.