Convert MP4 to AVI Online
The H.264/H.265 codecs inside are patent-encumbered, and editing requires full re-encoding. Converting to AVI gives you a key advantage: extremely simple container structure that every windows media tool has supported since 1992. AVI is best for storing uncompressed or lightly compressed video for editing on windows-based workflows.
Why Convert MP4 to AVI?
The H.264/H.265 codecs inside are patent-encumbered, and editing requires full re-encoding — converting to AVI overcomes this by providing extremely simple container structure that every windows media tool has supported since 1992
AVI is the right choice when you need to: working with legacy windows video archives from the divx/xvid era
Gain broader compatibility — AVI works with Windows Media Player, VLC, FFmpeg, most video editors; macOS and Linux via third-party players
Your MP4 files were created for streaming video content through html5 video players on websites, but now you need a format suited to different workflows
MP4 vs AVI — Format Comparison
MPEG-4 Part 14 (.mp4)
Audio Video Interleave (.avi)
How to Convert MP4 to AVI
Upload your MP4 file
Drag your .mp4 file onto the upload area or click to browse. We accept MP4 files up to 2 GB.
Choose AVI as output format
Select .avi (Audio Video Interleave) from the format list. Configure any format-specific settings to match your requirements.
Convert and download
Click Convert and wait for processing. Your AVI file will be ready to download in seconds. The result is optimized for storing uncompressed or lightly compressed video for editing on windows-based workflows.
Frequently Asked Questions
Is the MP4 to AVI conversion lossless?
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When both formats support lossless data, the conversion preserves all content. Depends on codec (DivX, Xvid, MJPEG, uncompressed); container supports up to 4K resolution.
How large will my AVI file be compared to the original MP4?
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MP4 files are typically 10 MB – 5 GB, while AVI files are typically 50 MB – 20 GB. The actual size depends on content complexity and any quality settings you choose.
What software can open the converted AVI file?
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AVI is compatible with: Windows Media Player, VLC, FFmpeg, most video editors; macOS and Linux via third-party players.
What is the maximum file size I can convert?
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PureConverter accepts MP4 files up to 2 GB. Your files are processed securely and deleted from our servers after conversion.
What's the difference between MP4 and AVI?
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MP4 (MPEG-4 Part 14) is best for streaming and sharing video online with the widest possible device and platform compatibility. AVI (Audio Video Interleave) is best for storing uncompressed or lightly compressed video for editing on windows-based workflows. Key tradeoff: MP4's advantage is universal playback support — every browser, phone, smart tv, and streaming platform handles mp4 natively, while AVI's advantage is extremely simple container structure that every windows media tool has supported since 1992.
Pro Tips for MP4 to AVI Conversion
Review the output AVI file to ensure all formatting and content transferred correctly from your MP4 source
Keep a backup of your original MP4 file — while our conversion is reliable, having the source is always recommended
AVI works especially well for: importing old home videos into modern editing software for re-encoding
Did you know? AVI is based on Microsoft's RIFF (Resource Interchange File Format), the same container used by WAV audio files — both formats share the exact same chunk-based binary structure.
Ready to Convert?
Upload your MP4 file above and get your AVI in seconds. Free, fast, and secure.