Convert AVI to MP4 — Free Online Converter
Convert AVI files to MP4 format instantly. Free online converter with no watermark. Compatible with all devices and platforms.
Conversion settings — add a file to adjust
About AVI to MP4 Conversion
AVI (Audio Video Interleave) was once the dominant video format on Windows computers, but today's devices and platforms prefer the more efficient MP4 format. Converting AVI to MP4 modernizes your video collection, dramatically reduces file sizes, and ensures compatibility with smartphones, tablets, smart TVs, and streaming platforms.
Our AVI to MP4 converter uses advanced FFmpeg encoding to transform your legacy AVI files into modern, web-ready MP4 videos. The process preserves your video's visual quality while taking advantage of MP4's superior compression technology. Most conversions achieve 40-60% file size reduction without visible quality loss.
Why Convert AVI to MP4?
AVI files served Windows users well for decades, but the format shows its age when compared to modern alternatives. AVI lacks native support for streaming, often contains outdated codecs that modern devices can't decode, and produces unnecessarily large files. Converting to MP4 solves all these problems.
MP4's H.264 codec delivers the same visual quality as AVI's older codecs at a fraction of the file size. A 2GB AVI file might become an 800MB MP4 with identical quality. This compression efficiency means faster uploads, less storage consumption, and smoother playback on mobile networks.
Modern platforms overwhelmingly prefer MP4. YouTube, Vimeo, Facebook, and Instagram all recommend MP4 uploads. Smart TVs and streaming devices like Roku and Fire TV handle MP4 natively. Even Windows 11 plays MP4 more efficiently than AVI.