Is my file uploaded when converting MP4 to AVI?

No. The conversion runs entirely in your browser. The file never leaves your device, there is no server to upload to, and the page works offline once loaded.

Is MP4 to AVI conversion free?

Yes, with no account, no watermark and no file limit per day. frogConvert is open source and there is no server cost to recover, because your device does the work.

How large a file can I convert?

Up to 2 GB for a single file, 500 MB total per batch, and 300 files at once. The practical limit is your device's memory, since everything is processed locally.

Convert MP4 to AVI

Converts MP4 to AVI for legacy software that requires it.

Convert MP4 to AVI →

Runs on: FFmpeg, compiled to WebAssembly, running in this tab
Steps: Direct, a single conversion
Input: .mp4 · video/mp4
Output: .avi · video/x-msvideo
Uploads: None. The file never leaves your device.

What to expect

AVI is a worse container in nearly every respect, and files typically get larger. Only do this when something specifically demands AVI.

Why convert MP4 without uploading

Most online converters take your file, send it to their servers, convert it there and hand back a download link. That means your document sits on someone else's disk, subject to their retention policy and their breaches. It also means you cannot use them offline, and cannot use them at all for anything confidential.

frogConvert does the conversion in the page itself, with FFmpeg compiled to WebAssembly. There is no upload step because there is no server. You can disconnect from the network and it still works.

About the formats

MP4

The default video container almost everywhere, normally holding H.264 video and AAC audio. Its ubiquity, not its technical merit, is the reason to choose it. More about MP4 files.

AVI

Microsoft's 1992 container, predating modern streaming and subtitle conventions. Still readable everywhere, but a poor home for anything encoded recently. More about AVI files.

Common questions

Is my file uploaded when converting MP4 to AVI?: No. The conversion runs entirely in your browser. The file never leaves your device, there is no server to upload to, and the page works offline once loaded.
Is MP4 to AVI conversion free?: Yes, with no account, no watermark and no file limit per day. frogConvert is open source and there is no server cost to recover, because your device does the work.
How large a file can I convert?: Up to 2 GB for a single file, 500 MB total per batch, and 300 files at once. The practical limit is your device's memory, since everything is processed locally.
What is lost converting MP4 to AVI?: AVI is a worse container in nearly every respect, and files typically get larger. Only do this when something specifically demands AVI.