Convert videos to any format
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Supports MP4, MKV, AVI, MOV, WebM and more
Drag & drop your AVI video
Automatic conversion with optimal settings
Save your converted MP4 file
Converting AVI to MP4 dramatically reduces file size while improving quality with modern H.264/H.265 codecs. It also enables playback on mobile devices, browsers, and social media platforms.
AVI is a classic multimedia container format introduced by Microsoft in 1992. While considered legacy, it remains widely used for compatibility with older systems and simple video storage.
MP4 is the most widely used video container format, supporting H.264, H.265/HEVC, and AV1 codecs. It offers excellent compatibility across all devices, browsers, and platforms while maintaining a good balance between file size and quality.
AVI is a legacy format with large files. MP4 offers 50-80% smaller files with better quality using modern codecs. MP4 is the clear upgrade.
Common scenarios for this conversion
Convert AVI to MP4 when your device or app doesn't support the original format.
Upload MP4 instead of AVI for better support on YouTube, Instagram, and TikTok.
Convert to MP4 for seamless import into professional editing software.
Play AVI files on any phone by converting to MP4.
Your files never leave your device. All conversion happens in your browser — no server uploads.
Hardware-accelerated conversion powered by WebCodecs and WebAssembly.
Convert between any video format combination.