Convert MP4 to AVI Free Online
Convert MP4 videos to the classic AVI format instantly in your browser. High quality, offline secure, and completely free — no upload needed.
Drop your .mp4 file here
Video Output
Legacy-Ready Video Conversion
Need your video in AVI format? Whether it's for older editing software, industrial systems, or archival purposes, our MP4 to AVI converter handles it all directly inside your browser. No uploads, no waiting — just instant, private conversion powered by WebAssembly.
Why Convert to AVI?
Quality Control
Choose from three quality levels to balance file size with visual fidelity. High quality keeps every detail, while smaller files save storage.
Browser-Powered
WebAssembly technology runs the conversion on your own CPU — no cloud servers involved, making it fast and completely private.
100% Private
Your video files never leave your device. Everything is processed locally, making it safe for sensitive or confidential content.
Universal Format
AVI is supported by virtually every video player ever made. Perfect for older systems, embedded devices, and archival workflows.
How this MP4 to AVI Converter works
This video conversion tool transforms MP4 files into the classic AVI (Audio Video Interleave) container format using FFmpeg WebAssembly for entirely browser-based processing. MP4 uses the efficient H.264 codec, while the AVI output employs MPEG-4 Part 2 video encoding paired with MP3 audio at 192kbps. Users can select from three quality tiers that adjust the quantization parameter, controlling the trade-off between visual fidelity and output file size.
The conversion pipeline loads the FFmpeg core engine as a WebAssembly module, writes the uploaded MP4 into a virtual filesystem, and executes the transcoding command with the selected quality settings. Real-time progress events from the FFmpeg engine update a visual progress bar so users can monitor encoding status. The resulting AVI file is assembled as a Blob object and presented for immediate preview and download.
AVI remains widely required in legacy video editing software, industrial monitoring systems, and certain medical imaging workflows that mandate this container format. Because the entire transcoding operation executes on the client CPU via WebAssembly, video files are never transmitted to remote servers, guaranteeing complete privacy for sensitive or proprietary footage.
How to Use
Upload MP4
Select or drag your .mp4 video file into the converter.
Choose Quality
Pick your preferred quality level — balanced works for most cases.
Convert & Download
Hit convert and download the AVI file when it's ready.
Example Usage
A screen-recorded presentation converted to AVI for import into legacy video editing software that only accepts AVI input files.
Frequently Asked Questions
Why convert MP4 to AVI?
Is there any quality loss during conversion?
How large will the resulting AVI file be?
Is my video uploaded to a server?
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The MP4 to AVI Converter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
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