MP4 to AVI Converter
Convert MP4 to AVI in your browser. Free, no signup. Conversion files are not uploaded to Format Convertly servers. Learn the formats, then convert when your workflow needs AVI.
Choose a file or drag and drop
Drop your MP4 file here or
Choose file · Drag & drop · Public file link
- Processed on your device
- No conversion file stored on our servers
- Maximum file size: 100 MB
Conversion runs in your browser. Files are not uploaded to Format Convertly servers.
Processed on your device
No conversion file stored on our servers
Conversion Settings
Customize the output to match your needs.
Convert Quality
92%Output
Output options for this format are applied automatically during browser conversion. Drop your file above to begin.
Advanced settings
Additional Options
Quality or bitrate forces a re-encode. Width/FPS apply only when creating GIF or animated WebP.
How to Convert MP4 to AVI
Open the MP4 → AVI converter
Open the MP4 to AVI converter on Format Convertly.
Add your MP4 file
Drop the MP4 into the browser dropzone.
Download AVI
Convert and download AVI for the legacy workflow that needs it.
Why Convert MP4 to AVI?
Private by design
MP4 → AVI runs in your browser. Files are not uploaded to a remote conversion queue.
Ready for the next step
Convert when a site, editor, or teammate expects AVI instead of MP4.
Practical quality
AVI: container (codec-dependent). Lossy targets trade size for speed — preview when it matters.
Wide compatibility
MP4 is commonly used for Social uploads and Website video.
AVI vs MP4
A quick side-by-side before you convert — deeper comparison lives on the full guide.
| Feature | MP4 | AVI |
|---|---|---|
| Era | Modern default | Legacy Windows |
| Compatibility | Excellent | VLC yes; others vary |
| Best for | Any new delivery | Old device exports |
| Web support | Excellent | Poor |
| Mobile playback | Excellent | Unreliable |
| Codec clarity | Clearer conventions | Often chaotic |
| Typical size | Depends on encode | Often large |
Choose MP4 when…
- Social uploads
- Phone playback
- HTML5 websites
- Client review copies
Choose AVI when…
- Preserving legacy device exports
- Older Windows-only toolchains
What happens to video quality?
AVI compatibility: Playable with VLC almost everywhere; built-in Windows/macOS players often fail when the AVI wraps uncommon codecs
Tip
Prefer MP4 for new sharing — AVI is usually a compatibility bridge, not a destination.
Does MP4 to AVI reduce quality?
AVI is typically lossy (container (codec-dependent)). Use a higher bitrate when fidelity matters, and keep the MP4 master for archival.
AVI format guide →Should I keep the original MP4?
Yes when you may need to re-encode later. MP4: MP4 is the safest video delivery format for phones, web, and social platforms. Shoot or edit in whatever your camera prefers, then provide an MP4 derivative for sharing.
MP4 format guide →MP4 · AVI
Related converters MP4
Related converters AVI
Frequently Asked Questions
More on quality loss: conversion quality guides · problem-solution guides
Does converting MP4 to AVI reduce quality?
It can — both sides are typically lossy. A careful encode may look similar; repeated re-encodes cause generational loss. Prefer converting once from the best master you have.
Can you recover quality after converting?
Not from a lossy output alone. Return to the original master (or a better source). Converting to a lossless format does not resurrect discarded detail.
What is generational loss?
Damage that stacks when you decode and lossy-encode the same file over and over (for example JPG→edit→JPG). Edit from masters and export delivery formats once.
Where can I learn more about conversion quality?
Browse Format Convertly’s Quality guides for topics like whether conversion reduces quality, JPG↔PNG myths, WebP/MP3/MP4 tradeoffs, recovery limits, and generational loss — each links to the right converter.
What is a MP4 file?
MP4 is a ubiquitous multimedia container usually holding H.264/H.265 video and AAC audio. MP4 is the safest video delivery format for phones, web, and social platforms. Shoot or edit in whatever your camera prefers, then provide an MP4 derivative for sharing.
Is MP4 lossy or lossless?
MP4 is typically lossy (lossy (codec-dependent)). That keeps files small but means discarded detail cannot be restored later.
What is a AVI file?
AVI is an older Audio Video Interleave container from Microsoft Windows multimedia. AVI still appears in legacy cameras, medical devices, and older Windows apps. Codecs inside vary wildly — convert to MP4 for reliable playback on modern phones and the web.
Is MP4 to AVI private?
Yes. The file is processed locally in your browser and is not uploaded to Format Convertly servers.
Ready to Convert Your Files?
MP4 to AVI privately in your browser.