Old AVI video won't play on your phone or upload to the web? Convert it to MP4 instantly. No app, no signup, no watermark.
Convert AVI to MP4 freeDrag and drop your AVI video — any standard AVI file works.
FixTheFile converts your AVI to a high-quality MP4 in seconds.
Your converted file downloads directly — no email, no account needed.
Upload your AVI file to FixTheFile, choose "Convert format", and select MP4 as the output. Your converted file downloads instantly — no signup required.
AVI is an older Windows video format created by Microsoft in the 1990s. It often produces large files and has poor compatibility with phones, browsers, and modern video editors.
AVI typically uses less efficient compression than modern formats. Converting to MP4 with FixTheFile produces a much smaller file at similar visual quality.
FixTheFile encodes at high quality settings, so any quality difference is minimal and not noticeable in normal playback.
Yes — the audio track is preserved automatically when you convert AVI to MP4.
No software needed. Works on any device. First fix is free.
Convert AVI to MP4 free