Convert MKV to MP3
Extract the audio from any MKV video and save it as MP3. Free, no sign-up, and your file never leaves your device.
or drag & drop videos, audio or images here, or paste with Ctrl+V
MP4 · MOV · MKV · AVI · WebM · WMV · FLV · GIF · MP3 · WAV · M4A · and 40+ more
- Files never leave your device
- No sign-up, no watermark
- Free forever
How to convert MKV to MP3
- Add your MKV fileClick “Choose files” or drag & drop your MKV file onto the page.
- Check the outputMP3 is pre-selected. Optionally trim, crop, compress or tweak quality in the tabs.
- Convert & downloadClick “Convert & download”. Your MP3 file is created on your device and saved instantly.
MKV vs MP3
Short answer: MP3 is the universal audio format. Every music player, car stereo and phone can play it.
What is MKV?
MKV (Matroska) is a flexible open container that can hold almost any video, audio and subtitle tracks in one file. Popular for movies and archiving.
What is MP3?
MP3 is the universal audio format. Every music player, car stereo and phone can play it.
Quality
Only the audio track is kept. If the codec already matches MP3 (for example AAC inside MP4 → M4A) we copy it losslessly; otherwise we encode at a high-quality default bitrate you can change.
| MKV | MP3 | |
|---|---|---|
| Full name | Matroska Video | MPEG-1 Audio Layer III |
| Type | video | audio |
| Best for | Movies, multiple audio/subtitle tracks and archiving | Music, podcasts and maximum compatibility |
| MIME type | video/x-matroska | audio/mpeg |
Last updated 2026-11-13
MKV to MP3: FAQ
Is this MKV to MP3 converter free?
Yes. Converting MKV to MP3 is completely free with no watermark, no sign-up and no file limits beyond what your device can handle. Optional Pro features like 4K export and AI subtitles are available if you need them, and a single 4K export can be unlocked without a subscription.
Are my MKV files uploaded to a server?
No, never. The conversion runs entirely in your web browser using FFmpeg compiled to WebAssembly. Your MKV file never leaves your computer or phone, and we never store it, which makes it private and fast.
Will I lose quality converting MKV to MP3?
Only the audio track is kept. If the codec already matches MP3 (for example AAC inside MP4 → M4A) we copy it losslessly; otherwise we encode at a high-quality default bitrate you can change.
How do I convert MKV to MP3 on iPhone or Android?
Open this page in Safari or Chrome on your phone, tap “Choose files”, pick your MKV file and tap “Convert & download”. No app install needed.
Can I convert multiple MKV files to MP3 at once?
Yes. Select several files and click “Convert all”. You can download them one by one or as a ZIP. Free users can batch-convert up to 5 files at a time; Pro removes the limit.
Can I edit the MKV before converting?
Yes: trim, cut, crop, rotate, resize, change speed, adjust colour, add text, music or subtitles, and more, all before you export to MP3.