Video ToolsFree

MP4 to AVI

Convert MP4 videos to AVI format for compatibility with older devices, legacy video editing software, and hardware players that require AVI. Uses FFmpeg WebAssembly for reliable in-browser conversion. No signup required.

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MP4, MOV, AVI, MKV, WebM, FLV, WMV, VOB

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Frequently Asked Questions

Why would I convert MP4 to AVI?▼
Older DVD players, some video editing software (Premiere CS3, Vegas 8), and legacy hardware media players require AVI format and cannot open MP4 files.
What codec is used for the AVI output?▼
MPEG-4 (DivX/Xvid-compatible codec) by default, for maximum legacy hardware compatibility. H.264 in AVI is also available as an option.
Is the video quality maintained?▼
Yes. Quality settings match the source. AVI containers don't affect visual quality — only the codec choice matters.
Will the AVI file be larger than the MP4?▼
Yes. AVI with MPEG-4 encoding is typically 50–100% larger than an equivalent MP4 because MP4's container is more efficient.
Is the conversion done in the browser?▼
Yes. FFmpeg WebAssembly runs locally. No file is uploaded to any server.