MP4 to AVI · Free

Convert MP4 to AVI

Turn your MP4 file into an AVI that plays where you need it, right in your browser.

Free to start
In your browser
Up to 500 MB

How it works

How to convert MP4 to AVI

Upload your MP4 file
Drag and drop a MP4 file, or click to browse. Up to 500 MB, and nothing is installed.
Confirm AVI as the output
AVI is already selected, so there is nothing to configure. Switch to another format in the panel if MP4 needs to go somewhere else.
Convert and download
We convert the MP4 on our servers, usually in under a minute. Create a free account to download the AVI, or keep editing it in REQO.

Why convert MP4 to AVI?

MP4 is the closest thing video has to a universal format: an MPEG-4 container that almost always holds H.264 video and AAC audio, which every browser, phone, TV and social platform can play without a plugin.

The practical problem: MP4 is already the safest format, so the usual reason to convert away from it is a specific destination that wants something else.

AVI solves that. Widely readable by desktop players from the same era.

Container

MP4MPEG-4 Part 14

AVIAudio Video Interleave (Microsoft)

Typical codecs

MP4H.264 video, AAC audio

AVIDivX, Xvid, MJPEG and other legacy codecs

Best for

MP4Sharing anywhere, uploads, web embeds

AVIOpening archive footage from the 2000s

Plays on

MP4Every phone, browser, TV and editor

AVIDesktop players with the right codec pack

File size

MP4Small for the quality

AVIVery large for the quality

Feature	MP4	AVI
Container	MPEG-4 Part 14	Audio Video Interleave (Microsoft)
Typical codecs	H.264 video, AAC audio	DivX, Xvid, MJPEG and other legacy codecs
Best for	Sharing anywhere, uploads, web embeds	Opening archive footage from the 2000s
Plays on	Every phone, browser, TV and editor	Desktop players with the right codec pack
File size	Small for the quality	Very large for the quality

FAQ

MP4 to AVI questions

Is the MP4 to AVI converter free?

Yes. Convert and preview the result for free, then create a free account to download it. There is no per-file charge and no watermark on the AVI itself beyond the free-plan badge.

Do I need to install any software?

No. The conversion runs on our servers and the whole flow happens in your browser, so it works the same on Windows, macOS, Linux, iPhone and Android. Nothing to install at either end. Where MP4 plays: Every phone, browser, TV and editor. Where the AVI you get back plays: Desktop players with the right codec pack.

Does converting MP4 to AVI reduce the quality?

Converting re-encodes the video, so it is not bit-for-bit identical. We encode at a high quality target, which keeps the result visually indistinguishable from the MP4 on normal viewing. What changes is the container and the codec. AVI holds: DivX, Xvid, MJPEG and other legacy codecs. Converting the same file back and forth repeatedly will eventually show, so keep your original.

How large a file can I convert?

Up to 500 MB per file, which is more footage in some formats than others. MP4: Small for the quality. AVI coming back: Very large for the quality. For anything bigger, trim or compress it first, both are free tools here.

Is my file kept private?

Your upload is processed and then held only as long as your project needs it. Nothing is published, indexed or shared unless you create a share link yourself.

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