MP4 to AVI - Online Video Converter

Convert MP4 to AVI online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert MP4 to AVI

[+] Drop MP4 video here or click to select MP4

Output format

AVI (MPEG-4 / MP3)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About MP4 to AVI

Convert MP4 to AVI. MP4 pairs H.264 video with AAC audio in the ISO base media container. AVI is Microsoft's 1992 RIFF container, often holding DivX or DV video. Old codecs inside may need transcoding before modern players open them..

Why convert MP4 to AVI?

Smaller files with AVI lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

MP4 vs AVI

Animation	Yes	Yes
Transparency	No	No
Compression	lossy	lossy
Typical use	MP4 pairs H.264 video with AAC audio in the ISO base media container.	AVI is Microsoft's 1992 RIFF container, often holding DivX or DV video.

When not to convert MP4 to AVI

Skip AVI for archival masters: lossy compression discards detail, so keep the MP4 original.
Keep a master copy: repeated exports stack small losses, so archive MP4 before batch AVI shares.

Limits

Starting point: MP4 - H.264 video with AAC audio in one file. H.264 has no alpha channel, so transparency is dropped. Old codecs inside may need transcoding before modern players open them. Encode AVI (MPEG-4 / MP3) from MP4 at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert MP4 to AVI?

Drop your MP4 file onto this page, choose quality and codec settings, then click Convert. The result downloads as AVI instantly. All processing runs in your browser.

What codec is used for AVI?

The default codec for AVI is MPEG-4 / MP3. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.