Why would anyone still need AVI in the MP4 era?

Legacy hardware and software: old DVD players with USB ports, in-car entertainment systems, industrial equipment, and vintage editing tools that predate MP4. If a device's manual says AVI, this conversion is the bridge.

Will converting MP4 to AVI lose quality?

The video is re-encoded to a codec the target device can handle, which adds a small loss — and often a larger file, since older codecs are less efficient. Convert a copy and keep the MP4 as your master.

My old device still won't play the converted AVI — why?

Old devices are picky about codecs inside the AVI, not just the container — many need MPEG-4 Part 2 (DivX/XviD-class) video and MP3 audio, and reject anything newer. Check the device's supported-codec list against what the converter produced.

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AVI is an older Microsoft container still required by some legacy editing suites, media players, and hardware. Converting MP4 to AVI restores compatibility with those older workflows.

Convert MP4 to AVI – Free Online MP4 to AVI Converter

Why convert MP4 to AVI?

Import into legacy Windows video editors that expect AVI.
Play on older media players and set-top boxes lacking MP4 support.
Meet input requirements of some specialised or industrial software.

Tip: AVI is less space-efficient than MP4, so the converted file is usually larger.

How to convert MP4 to AVI

Upload your MP4 file using the area above.
AVI is preselected as the target format.
Click Start and wait for the conversion to finish.
Download your converted AVI file.

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