Free & Instant

Convert MP4 to AVI Online — Free Video Converter

Transform MP4 video files to AVI format for Windows compatibility.

Upload your file

Drag & drop your .mp4 file here, or browse
Multiple files supported

.MP4.AVI

Maximum file size: 500 MB · Multiple files supported

100% private — files are processed in your browser, never uploaded

How It Works

MP4 to AVI in 4 Easy Steps

Convert MP4 to AVI in seconds — no sign-up, no upload, no catch.

  1. 1

    Upload MP4 video

    Drag & drop your MP4 file or click to browse.

  2. 2

    Select AVI format

    AVI is pre-selected as the output container.

  3. 3

    Convert in browser

    The video is re-muxed to AVI format locally.

  4. 4

    Download AVI

    Your AVI video file is ready to download.

Use Cases

Why convert MP4 to AVI?

  • Play MP4 files in Windows Media Player
  • Create AVI files for legacy video editing software
  • Prepare videos for DVD authoring

Related Video Conversion Tools

Need to convert other formats? Try these popular free online tools.

.mp4.mp3
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.mov.mp4
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.mkv.mp4
MKV to MP4
.avi.mp4
AVI to MP4
.webm.mp4
WebM to MP4
.mkv.avi
MKV to AVI
.video.gif
Video to GIF

Why Convert MP4 to AVI with Mr. Converter?

Discover why millions of users trust Mr. Converter for fast, secure, and accurate MP4 to AVI file conversions directly inside their browser.

100% Private & Secure

  • ✓Zero File Uploads: Conversions execute locally on your machine using browser WebAssembly.
  • ✓No Cloud Storage: Your confidential data never touches remote servers or third-party databases.
  • ✓GDPR & Privacy Compliant: Complete end-to-end privacy for sensitive documents and media.

Lightning Fast & Unlimited

  • ✓Instant Processing: Skip queue wait times and server upload delays.
  • ✓No File Size Limits: Convert large MP4 files without artificial size restrictions or paywalls.
  • ✓No Email Required: Instant direct downloads without registration or credit cards.

Format Comparison: MP4 vs AVI

Feature / PropertyMP4 FormatAVI Format
Primary CategorySource Document / MediaTarget Converted File
Browser CompatibilityStandard Compatible100% Universal Support
File CompressionUncompressed / Original StructOptimized & Portable
Privacy & EncryptionPreserved during conversionEncrypted output supported
Typical Use CaseEditing & Content CreationSharing, Archiving & Publishing
FAQ

Frequently Asked Questions

Yes. The AVI file uses high-quality encoding to match the source quality.

Files up to 500 MB are supported. Larger files may take longer to process.