Free AVI to MP4 Converter

Convert AVI to MP4 for free in your browser. Modernize old video files for today's devices. Reduce file size by up to 80% while improving compatibility. No upload required - 100% private and secure.

What is AVI?

AVI (Audio Video Interleave) is a legacy video format introduced by Microsoft in 1992. While AVI was revolutionary in its time, it uses older compression methods that result in very large file sizes. AVI files can be 5-10 times larger than modern formats like MP4 for the same video quality.

What is MP4?

MP4 is the modern standard for video files, using advanced H.264 or H.265 compression to deliver excellent quality at much smaller file sizes. MP4 is supported by all modern devices, streaming platforms, and video editing software. It's the format used by YouTube, Netflix, and virtually all professional video applications.

Why convert AVI to MP4?

Converting AVI to MP4 reduces file sizes dramatically (often 80-90%) while maintaining or even improving quality with modern codecs. MP4 also works on smartphones, tablets, smart TVs, and modern media players, while AVI may not. Converting old AVI videos to MP4 saves storage space, enables mobile playback, allows online streaming, and future-proofs your video library.

Why Use Konverton for AVI to MP4 Conversion?

Format Conversion

Convert between MP4, WebM, AVI, MKV, MOV, and other video formats. Adjust video bitrate and quality for optimal results.

Quality Control

Adjust video bitrate from 500k to 8M for optimal quality and file size. Choose the perfect balance for your needs.

100% Private

All conversions happen in your browser. Your files never leave your device.

Batch Processing

Convert multiple video files at once with batch processing. Apply the same settings to all files for efficient workflow.

Technical Specifications

AVI Input:
  • Legacy video format from 1992
  • Outdated compression (DivX, XviD)
  • Very large file sizes
  • Limited modern device support
MP4 Output:
  • Modern H.264/H.265 compression
  • 80-90% smaller file sizes
  • Universal device compatibility
  • Streaming-ready format

Frequently Asked Questions