Convert AVI to MKV Online — Free & Fast | AnyConv

AVI to MKV Converter

Quickly convert multiple avi files to mkv — free & online.

Drag & drop your files here or click to upload

How to convert AVI to MKV online

Follow these simple steps to convert avi files to mkv using AnyConv. It works on all devices — Windows, Mac, Linux, iPhone, Android.

Upload your AVI file

Drag & drop your file into the upload area. You can also click to select it manually. Max file size: 100 MB.

Start converting

Hit the “Convert” button to turn your AVI into MKV. The process usually takes just a few seconds.

Download your MKV

Once ready, download your converted file instantly. The download link is private and only works on your device.

What is a AVI file?

AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft. It can store both video and audio data in a single file and supports a variety of codecs.

Although an older format, AVI is still widely supported and used for video playback, editing, and sharing. However, its larger file sizes and limited support for newer features make it less efficient than modern formats.

How to open AVI files

AVI files are compatible with nearly all media players, including VLC, Windows Media Player, and QuickTime (with codecs). They are widely used in both editing and playback.

You can convert AVI to MP4 or MKV using AnyConv for improved compression and compatibility.

Key facts about AVI

  • Full name: Audio Video Interleave
  • Extension: .avi
  • MIME type: video/x-msvideo
  • Developed by: Microsoft
  • Initial release: 1992

Useful links and resources

What is a MKV file?

MKV (Matroska Video) is a flexible, open-standard container format capable of holding unlimited video, audio, subtitle tracks, and metadata. It’s popular for high-quality video content, including HD and Blu-ray rips.

MKV is widely supported and ideal for movies, series, and complex media projects. It’s open-source and favored for its advanced features and strong compression support.

How to open MKV files

MKV files are supported by VLC, MPC-HC, KMPlayer, and many smart TVs and media servers. It's a preferred format for high-definition video and multiple tracks.

Use AnyConv to convert MKV to MP4 or another format for broader compatibility.

Key facts about MKV

  • Full name: Matroska Video File
  • Extension: .mkv
  • MIME type: video/x-matroska
  • Developed by: Matroska.org
  • Initial release: 2002

Useful links and resources

Convert to MKV

Want to get a file in MKV format? Choose the original format you’re starting with — AnyConv can quickly convert dozens of file types into MKV.

❓ Frequently Asked Questions

Answers to common questions about converting AVI to MKV
  • Do I need to register to convert AVI files?
    Not at all! You can convert AVI to MKV without signing up or installing anything.
  • Is it safe to convert AVI to MKV on AnyConv?
    Absolutely. All AVI and MKV files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
  • Will the quality change after converting AVI to MKV?
    We do our best to preserve the original quality during AVI to MKV conversion. The result is accurate and clean.
  • How long does it take to convert AVI to MKV?
    Most conversions from AVI to MKV take just a few seconds — even for larger files.
  • Can I upload more than one AVI file?
    Yes, batch conversion is supported. You can convert multiple AVI files to MKV at once — fast and easy.
  • What browsers support AVI to MKV conversion?
    All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting AVI to MKV on any platform.
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