Convert MKV to MP3
Only the sound of the MKV is kept, encoded again as MP3. If the file already carries MP3 audio, it’s copied as it is, with no loss.
They open in the converter with MP3 selected.
Browse filesFiles stay on your device.
What changes
Only if your MKV already has MP3 audio does MP3 accept it as it is, so the converter copies the audio without re-encoding, in seconds and with no loss. If not, or if you change the quality, volume or trim, the audio is decoded and compressed again, and loses a little more detail.
If it’s copied, the MP3 is the same size as the MKV's audio track: far smaller than the original, since the picture is gone. If it’s re-encoded, it gets smaller: MP3 stores the same content in less space.
Your browser may not be able to open MKV files, but the converter reads the file itself, so it can still convert it.
How big the MP3 will be
At 192 kbps, 4 min of MP3 take 5.8 MB.
When it’s worth it
Choose MP3 for: Music, podcasts, and everyday sharing. Small files that play on almost anything.
Stay with MKV for: Video collections with several audio tracks and subtitles.
How to convert MKV to MP3
- Drop the MKV files on this page, or browse for them. Up to 200 at once.
- The converter opens with the files loaded and MP3 selected.
- Press Convert, then save each file or all of them as a ZIP.
Questions
Does converting MKV to MP3 lose quality?
Usually a little, because the audio is compressed again. Only files that already carry a codec MP3 accepts are copied without loss.
What is the MP3 format?
A lossy codec where the audio is cut down by removing sounds the ear can’t hear, so a track keeps a reasonable size at a typical bitrate. It’s still the most widely playable audio format, which is why it’s the default for sharing music.
What is the MKV format?
Matroska, an open container that can hold any codec in separate tracks, with subtitles as real tracks instead of burned-in text. That flexibility is why it’s the favorite for archiving and for fansubs.
Are the files uploaded?
No. The file is opened in this tab, converted here and saved from here. There’s no account and no watermark.
How many files can be converted at once?
Up to 200 per batch and about 2 GB per file, within the memory this device has available.