🎬 Video Converter
Convert AVI to MKV — Free & Private
Convert AVI to MKV to move your video into a modern flexible container with subtitle support.
✓ Free forever✓ No upload✓ No signup✓ Instant
Ready to convert your AVI?
100% in your browser · Powered by FFmpeg.wasm · No account needed
How to Convert AVI to MKV
1
Open the Converter
Click "Convert Now" to open with AVI → MKV pre-selected.
2
Upload Your AVI
Drag & drop your AVI file or click Browse to select it.
3
Convert Instantly
FFmpeg.wasm processes your video locally — nothing uploaded.
4
Download MKV
Your converted MKV file downloads automatically.
Why Convert AVI to MKV?
- 🖥️ From AVI — convert classic Windows AVI files to modern or more compatible formats
- 📦 Flexible container — MKV supports multiple audio tracks, subtitles, and chapters
- ✨ Quality preserved — video stream copied without re-encoding where possible
- 🌍 Open standard — supported by VLC, Plex, Kodi, and most modern players
- 🔊 Multi-track audio — store multiple language tracks in a single file
- 🔒 100% private — files never leave your device
Features
100% Private
Files never leave your browser.
Instant
In-browser processing, no waiting.
Free
No account, no fee, no watermarks.
Quality Preserved
High-quality settings by default.
Mobile-Friendly
Works on any device.
No Install
Works in any modern browser.
Frequently Asked Questions
Yes — 100% free, no limits, no watermarks, no account needed.
No. All conversion happens locally using FFmpeg.wasm. Your files never leave your device.
Quality depends on the target format. Conversions use high-quality settings by default.
Yes — no strict size limit, though very large files may take longer on slower devices.
Speed depends on file size and your device. Everything processes locally in your browser.