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HomeMKV vs AVI
.mkv
.avi

MKV vs AVI

Compare Matroska Video and Audio Video Interleave formats — understand the key differences and when to use each

Format Overview

MKV

Matroska Video

MKV (Matroska Video) is an open-source, flexible video container format created in 2002. MKV can hold virtually unlimited video, audio, subtitle, and attachment tracks in a single file, making it the most versatile video container available. It supports every major video codec (H.264, H.265, VP9, AV1), audio codec (AAC, FLAC, DTS, TrueHD, Atmos), and subtitle format (SRT, ASS, PGS). MKV is the preferred format for high-quality video collections, Blu-ray rips, and anime with multiple audio and subtitle tracks. It supports chapters, menus, metadata, and attached fonts. While MKV has excellent software support (VLC, MPV, Plex), some hardware devices and smart TVs have limited MKV compatibility. For maximum compatibility, converting MKV to MP4 is recommended.

.mkvvideo

AVI

Audio Video Interleave

AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992 as part of Windows 3.1. AVI stores interleaved audio and video data and supports a wide range of codecs including DivX, XviD, MPEG-4, and uncompressed video. While AVI is one of the oldest video formats still in use, it has several limitations: no native support for modern codecs (H.265), subtitles require external files, and streaming capabilities are limited. AVI files tend to be larger than MP4 or MKV equivalents. However, AVI remains widely supported by media players and video editing software. Many legacy video cameras and older devices output AVI files. Converting AVI to MP4 typically reduces file size while maintaining quality and improving compatibility with modern devices.

.avivideo

MKV vs AVI: Feature Comparison

FeatureMKVAVI
Full NameMatroska VideoAudio Video Interleave
File Extension.mkv.avi
Categoryvideovideo
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use MKV vs AVI

Use MKV when you need:

  • •Files in Matroska Video format for maximum compatibility
  • •Industry-standard video format support
  • •Wide software and platform compatibility

Use AVI when you need:

  • •Files in Audio Video Interleave format for specific workflows
  • •Optimized video format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

MKV AVIAVI MKV
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Frequently Asked Questions

What is the difference between MKV and AVI?
MKV (Matroska Video) and AVI (Audio Video Interleave) are both video file formats. MKV files use the .mkv extension while AVI uses .avi. They differ in compression, quality, compatibility, and intended use cases.
Can I convert MKV to AVI for free?
Yes! Convert999 lets you convert MKV to AVI completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, MKV or AVI?
It depends on your use case. MKV (Matroska Video) may be better for certain workflows, while AVI (Audio Video Interleave) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

MKV Converter

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AVI Converter

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Convert to AVI

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Format Statistics

Trends & data 2025

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