AVI to MP4 Converter
Bring old AVI recordings into the present: convert them to H.264 MP4 that modern phones, browsers and editors play without extra codecs. Local conversion, no upload.
AVI files outlived the players that understood them
AVI was the standard Windows video container for years, and mountains of family footage, dashcam clips and screen recordings still sit in it. Modern phones, browsers and editors have quietly dropped most of the codecs those files use, so an AVI that played fine in 2009 may open as a black screen today. Converting it with the video to MP4 converter above re-encodes the footage as H.264 MP4 — playable everywhere now, and future-proof for the next device you buy.
Smaller files, same pictures
Older AVIs are often barely compressed, which is why a two-minute clip can weigh hundreds of megabytes. H.264 typically shrinks that dramatically at a similar visible quality, capped at the maximum resolution you select and never upscaled. The trade-off is that encoding is lossy and subtitles are not copied, so keep the original AVI as your archive master. The same converter also modernises MOV to MP4, WebM to MP4 and MKV to MP4 files.
Your footage stays home
Old personal recordings are exactly the files you least want on a stranger's server. This conversion runs entirely in your browser, start to finish.
Frequently asked questions
Why do AVI files fail on modern devices?
AVI dates from 1992 and can contain dozens of different codecs, many long abandoned. Phones and browsers dropped most of them, so an AVI often plays with no picture or no sound until it is converted.
Will converting improve an old, low-quality AVI?
No. The MP4 is encoded from whatever the AVI contains; it cannot restore detail that was never recorded. Conversion makes the file playable and smaller, not sharper.
Why is the MP4 so much smaller than the AVI?
Many AVIs store lightly compressed or uncompressed video. H.264 is far more efficient, so the same footage usually takes a fraction of the space at similar visible quality.
What if my AVI will not convert?
A few legacy codecs inside AVI files cannot be decoded by the in-browser engine, and damaged files can fail. Common DV, DivX-era and screen-recording AVIs convert normally.
Is my recording uploaded anywhere?
No. Reading, encoding and downloading all happen in your browser. The AVI never leaves your device and no account is needed.
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