AVI to MP4 Converter - Play AVI Files Anywhere

Convert AVI videos to MP4 for universal playback. Reduce file size 50-80% while keeping quality. Works on any device, browser-based, no uploads.

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Drop AVI file here or click to browse

Also supports other video formats

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All processing happens in your browser using FFmpeg WebAssembly. Your videos never leave your device—completely private and secure.

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Frequently Asked Questions

AVI (Audio Video Interleave) is Microsoft's 1992 container format. While it was revolutionary for its time, AVI uses older compression methods resulting in massive file sizes. MP4 with modern H.264 encoding produces the same quality at 2-5x smaller file sizes, making videos easier to store, share, and stream.

AVI files are created by older Windows software (Windows Movie Maker, VirtualDub), legacy security cameras, DVD rippers, screen recorders, and video capture cards. Many older camcorders and digital cameras also saved in AVI format. While common in the 2000s, AVI is now considered a legacy format.

Web browsers don't support AVI playback—no Chrome, Firefox, Safari, or Edge will play AVI natively. iPhones and Android phones also lack native AVI support. AVI files require specific codecs (like DivX or Xvid) that most modern devices simply don't include. MP4 plays everywhere without additional software.

Some quality loss occurs during re-encoding, but it's typically imperceptible at 'High Quality' or 'Best Quality' settings. The benefit is massive file size reduction—a 1GB AVI typically becomes 200-400MB as MP4 with similar visual quality. For minimal quality loss, choose 'Best Quality' and start from the highest quality source you have.

Conversion is slower than the video's duration—a 10-minute video might take 15-40 minutes depending on your device. Desktop computers convert faster than laptops, which convert faster than phones. Higher quality settings increase processing time. For frequent conversions or large files, desktop software like HandBrake is faster.

AVI often uses inefficient codecs like uncompressed video, DivX, or Xvid. MP4 with H.264 uses sophisticated compression that achieves better quality at much smaller sizes—typically 50-80% smaller. A 500MB AVI might become 100MB as MP4 while looking nearly identical.

Yes, this is perfect for archiving old home videos. Converting to MP4 makes them playable on modern devices and reduces storage requirements. Use 'High Quality' or 'Best Quality' settings to preserve as much detail as possible from your original footage.

For most uses, 'High Quality' provides excellent results with reasonable file sizes—perfect for sharing or viewing. Choose 'Best Quality' for archiving important videos or professional work. 'Smaller File' works well for quick sharing via messaging apps or when storage space is limited.

Yes! MP4 is universally supported by all smart TVs (Samsung, LG, Sony), streaming devices (Roku, Fire TV, Apple TV, Chromecast), and game consoles (PlayStation, Xbox). Unlike AVI, which often requires specific players or won't play at all, MP4 works everywhere.

No, never. All conversion happens entirely in your browser using FFmpeg WebAssembly. Your video files stay completely private on your device and are never transmitted anywhere. The tool works offline after the initial page load.

AVI to MP4 Converter - Play AVI Files Anywhere

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