Convert MP4 to AVI Online
MP4 to AVI conversion with a browser-first path and server fallback. It is free, supports batches, and accepts up to 100 MB per server upload. The conversion runs on the server in an isolated request. Keep the original file while you review the converted copy.
Convert .MP4 to .AVI
Select a file to begin. Processing details and limits are listed below.
How to convert MP4 to AVI
- 1
Upload MP4 files
Add one or more MP4 files to the queue. The uploader keeps batch items separate.
- 2
Choose AVI settings
Set the available quality or format options, or keep the defaults for a first pass.
- 3
Run and save the result
Run the queue and download the AVI files individually or together as a ZIP.
MPEG-4 Part 14 video vs Audio Video Interleave
| Spec | MPEG-4 Part 14 video | Audio Video Interleave |
|---|---|---|
| MIME type | video/mp4 | video/x-msvideo |
| Format type | video | video |
| Standard | ISO/IEC 14496-14 | Pending review |
| First release | 2003 | Pending review |
| Browser support | All current major browsers for common codecs | Pending review |
| Contents | Container for video, audio, subtitles, and metadata. Common payloads include H.264, H.265, AV1, AAC, and MP3. | Standard Windows video container. |
About MPEG-4 Part 14 video
Broad device support, efficient streaming, flexible codec choices, and good compatibility with social platforms. Compatibility depends on the codecs inside the container, not only the .mp4 extension; advanced subtitles and chapter support vary.
Format referenceAbout Audio Video Interleave
Standard Windows video container.
Why convert MP4 to AVI?
- A converted copy separates the delivery format from the original edit or camera file.
- AVI is more widely accepted by browsers, phones, TVs, or sharing services than the source MP4 file.
- A standardized output makes it easier to archive, upload, or hand a file to someone with different software.
- Playback compatibility is usually the main reason to change a media container.
Will quality change?
The conversion standardizes the container and codecs for compatibility. It is a delivery step, not a lossless remux. Check a sample before processing a large batch.
Processing and limits
- Processing
- Server-side
- Engine
- FFmpeg
- Maximum size
- 100 MB per file on the server.
- Batch support
- Yes, multiple files can be queued; completed results can be downloaded as a ZIP.
- Quality controls
- Options can adjust output dimensions, audio bitrate.
The file is processed on the server because the conversion requires a server-side engine or a utility operation.
- Compatibility depends on the codecs inside the container, not only the .mp4 extension; advanced subtitles and chapter support vary.
- Check metadata, dimensions, and compatibility after the conversion.
- Very large files can hit the 100 MB server limit before conversion starts.
Platform compatibility
The output is a AVI file. Use an application or device that accepts that format, and test the result on the destination platform if compatibility is critical.
When not to convert
- For a one-off preview, a local viewer may be faster than creating a new delivery file.
- If AVI support is uncertain on the destination device, test a sample before processing a large batch.
- Do not use a converted file as the legal or signed original when signatures or metadata must be preserved.
Frequently asked questions
- How do I convert MP4 to AVI online?
- Upload a MP4 file, choose the available AVI options, run the conversion, and download the result. The tool is free, supports batches, and accepts server uploads up to 100 MB.
- Is Convert MP4 to AVI free?
- It is free, requires no account, and adds no watermark. Server uploads are limited to 100 MB per file, and browser-first paths are limited by device memory.
- Does MP4 to AVI conversion lose quality?
- The conversion standardizes the container and codecs for compatibility. It is a delivery step, not a lossless remux. Check a sample before processing a large batch.
- Where is the file processed?
- Yes. This conversion uses a server-side engine, so the file is uploaded over HTTPS, processed in an isolated request, and removed after the result is produced.
- How do I process a batch?
- Queue multiple files, run them together, and download the finished results as a ZIP. Each server file is limited to 100 MB, and large batches may take longer.
- What can go wrong?
- Open the downloaded AVI file in the application or database you plan to use, check the structure against the source, and keep the original until the output is approved.