Convert MP4 to AVI
The tracks are usually re-encoded, which costs a little quality. If the MP4 already carries codecs AVI accepts, they are copied as they are and nothing is lost.
They open in the converter with AVI selected.
Browse filesFiles stay on your device. Going the other way? AVI to MP4
What changes
Only if your MP4 already has H.264 or MPEG-4 video with MP3 or AC-3 audio does AVI accept it as it is, so the converter copies the tracks without re-encoding, in seconds and with no loss. If not, or if you change the quality, size, scale or trim, the video is decoded and compressed again, and loses a little more detail.
If it’s copied, it’s about the same size as the MP4: only the container changes. If it’s re-encoded, the size stays about the same.
When it’s worth it
Choose AVI for: Legacy Windows video files. Old players and editing software open it.
Stay with MP4 for: Phones, websites, social networks, and TV.
How to convert MP4 to AVI
- Drop the MP4 files on this page, or browse for them. Up to 200 at once.
- The converter opens with the files loaded and AVI selected.
- Press Convert, then save each file or all of them as a ZIP.
Questions
Does converting MP4 to AVI lose quality?
Usually a little, because the video is compressed again. Only files that already carry a codec AVI accepts are copied without loss.
What is the AVI format?
Audio Video Interleaved, Microsoft's video container from the nineties and still one of the most common files around. It’s a simple wrapper, so whatever codec is inside can be old and heavy, and it was never designed for streaming.
What is the MP4 format?
A container that holds a video track, one or more audio tracks and metadata, and nothing else: which codec sits inside is a separate question. H.264 or H.265 video with AAC audio is the combination almost everyone means by MP4.
Are the files uploaded?
No. The file is opened in this tab, converted here and saved from here. There’s no account and no watermark.
How many files can be converted at once?
Up to 200 per batch and about 2 GB per file, within the memory this device has available.