Convert AVI to MKV — Free & Private
Convert AVI to MKV online for free. AVI is a classic Microsoft video container format; MKV is a flexible container format that supports multiple streams. All processing happens locally in your browser — your files never leave your device.
How to convert AVI to MKV
- 1
Select your AVI file
Click or drag your AVI file onto the converter above.
- 2
Convert to MKV
The output format is pre-set to MKV. Click the convert button to process your file.
- 3
Save instantly
Your converted MKV file is ready — save it to your device, no email required.
AVI to MKV — FAQ
Is the AVI to MKV converter really free?
Yes, completely free. No hidden fees, no watermarks, no file size limits. LocalConvert is open source and free forever.
Are my AVI files safe?
Absolutely. Your files never leave your browser. All AVI to MKV conversion happens using WebAssembly running locally on your device — no uploads, ever.
How long does AVI to MKV conversion take?
Most conversions finish in seconds. Larger files may take a little longer depending on your device's speed and memory.
What's the difference between AVI and MKV?
AVI is a classic Microsoft video container format. MKV is a flexible container format that supports multiple streams.