MP4 – MPEG-4 Part 14
MP4 is the most widely supported video container. It usually holds H.264 or H.265 video with AAC audio and plays on nearly every phone, computer, TV and browser.
More MP4 conversionsDrop your MP4 files here
or click to choose MP4 files · up to 95MB each
How to convert MP4 to AVI
- Choose your files. Click Select File or drag your MP4 files into the upload box. You can add many at once.
- Pick the settings. AVI is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
Why convert MP4 to AVI?
Some older TVs, DVD players, car screens and editing programs only play AVI. Converting MP4 to AVI makes your video playable on those devices.
When to keep the MP4
Keep the MP4 for everything else: it is smaller and plays on modern phones, computers and websites.
Tips for the best result
- The video uses MPEG-4 Part 2 (the codec known from DivX and Xvid) and the sound uses MP3, which older players support.
- The AVI is usually larger than the MP4.
- Subtitles inside the MP4 are not carried over.
Common problems and fixes
- The player still will not play the AVI.
- Some very old players need a smaller frame size. Check the player's manual for supported resolutions.
- The file is much bigger.
- AVI uses older compression. That is normal; keep the MP4 where possible.
AVI – Audio Video Interleave
AVI is an older Microsoft video container from 1992. It is still found in legacy archives, but files are large and browsers do not play them.
More AVI conversionsConverting MP4 to AVI
- Re-encoded with widely compatible codecs (H.264/AAC for MP4, MOV, MKV; VP9/Opus for WebM).
Frequently asked questions
Why would I convert MP4 to AVI?
Only for older devices or software that do not play MP4.
Is the quality the same?
The video is re-encoded at high quality; on most screens it looks the same.
How do I convert MP4 to AVI?
Click Select File or drop your MP4 file onto the upload box. The converted AVI appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.