Convert MKV to MP3 — Free & Private
Extract MP3 audio from MKV video files directly in your browser. No uploads, no accounts, completely free.
How to convert MKV to MP3
- 1
Select your MKV file
Click or drag your MKV file onto the converter above.
- 2
Convert to MP3
The output format is pre-set to MP3. Click the convert button to process your file.
- 3
Save instantly
Your converted MP3 file is ready — save it to your device, no email required.
MKV to MP3 — FAQ
Is the MKV to MP3 converter really free?
Yes, completely free. No hidden fees, no watermarks, no file size limits. LocalConvert is open source and free forever.
Are my MKV files safe?
Absolutely. Your files never leave your browser. All MKV to MP3 conversion happens using WebAssembly running locally on your device — no uploads, ever.
How long does MKV to MP3 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 MKV and MP3?
MKV is a flexible container format that supports multiple streams. MP3 is the most widely-supported lossy audio format.