AVI to MP4 Converter
Convert legacy AVI videos to modern MP4 format. Smaller files, better compatibility. No uploads, works in your browser.
Opens converter with MP4 pre-selected
Private & Local
Your AVI file never leaves your device. All processing happens locally.
Fast Processing
Powered by FFmpeg WebAssembly with multi-threading support.
Free to Use
No subscriptions, no watermarks, no file size limits.
Modernizing Your AVI Video Collection
AVI (Audio Video Interleave) was a dominant format in the 1990s and 2000s. While it served well for years, modern devices and platforms have moved on to more efficient formats.
Converting AVI to MP4 brings your video collection into the modern era. You will enjoy smaller file sizes, better streaming capability, and compatibility with all current devices.
This browser-based converter handles most AVI files without requiring any software installation. Your files remain private on your device throughout the process.
Optimal Settings for AVI Conversion
For standard definition AVI files (480p or lower), the "Balanced" preset produces excellent results. These older files compress very efficiently in modern codecs.
If your AVI files are from camcorders or older cameras, keeping original resolution is usually fine. The quality is limited by the source, not the conversion.
For large AVI files, consider the "Fast" preset to reduce processing time. Quality differences are often minimal for older source material.
Preserving Your Video Archive
Before converting, ensure you have backups of your original AVI files. While conversion generally works well, originals are irreplaceable.
After conversion, verify the MP4 plays correctly and audio is synchronized. Name files clearly to maintain your organization system.
MP4 files are widely supported for long-term archival. Your converted files should remain playable for years to come on future devices.
AVI to MP4 FAQs
Why convert AVI to MP4?
AVI is an older format that creates larger files and has limited device support. MP4 offers better compression, smaller sizes, and universal compatibility with modern devices.
Will I lose quality converting old AVI files?
Conversion quality depends on the original AVI encoding. For older, lower-quality source files, use "Balanced" preset. The output quality cannot exceed the source quality.
Can I convert DivX AVI files?
Most DivX-encoded AVI files are supported. Some very old or rare codecs may not work in browser-based conversion.
How much smaller will the MP4 be?
MP4 typically produces files 30-60% smaller than AVI for equivalent quality. Exact reduction depends on the original encoding and chosen settings.
Is the conversion secure?
Yes. Your AVI file is processed entirely in your browser. Nothing is uploaded to any server. Your old videos remain private.
Can I batch convert multiple AVI files?
Currently, files must be converted one at a time. However, the process is quick and you can start each new file immediately after the previous one completes.
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