Convert AVI to MKV

Transform your classic microsoft video container into MKV format. Free, private, and browser-based.

How it works

  1. Upload AVI Files — Drag and drop your AVI files into the converter, or click to browse. Common sources: older cameras, windows applications.
  2. Convert to MKV — The converter processes your files to MKV format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted MKV files instantly. For multiple files, download individually or as a ZIP archive.

Why convert AVI to MKV

  • Make AVI files accessible on macOS, Linux, and mobile devices
  • Convert to lossless MKV format to prevent further quality degradation during editing
  • Leverage MKV advantages: supports multiple audio/subtitle tracks
  • Overcome AVI limitations: very large files

FAQ

Is AVI to MKV conversion free?
Yes, Fileza.io converts AVI to MKV completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting AVI to MKV?
Both AVI and MKV use lossy compression. Output quality is excellent at high quality settings (85%+) — most people cannot see any difference.

Is it safe to convert AVI to MKV online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your AVI files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple AVI files to MKV at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple AVI files at once and they will all be converted to MKV simultaneously. Download them individually or as a ZIP archive.

Does AVI to MKV conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted MKV files be smaller or larger than AVI?
File sizes depend on content and quality settings. AVI files are typically large (often uncompressed), while MKV files are varies by codec.

How long does AVI to MKV conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly. Video files may take longer due to re-encoding.