MKV to MP3 converter

Pull the audio out of a MKV video and save it as MP3, entirely in your browser.

Drop MKV files here or choose files.

Choose file (multiple allowed)

Up to 500MB and 60 minutes per file
Up to 10 files at a time
MKV files with audio the browser cannot decode (AC-3, DTS) will not open

MP3 quality

192kbps is enough for music. Use 128kbps for lectures and call recordings, 320kbps for a music archive.

Channels

Mono merges left and right into one channel and reduces the file size (WAV drops by half). Good for voice recordings.

Sample rate

You are unlikely to hear a difference either way. Pick 48kHz if the audio is going back into a video editor.

Start

Leave blank to start from the beginning. Write 90 or 1:30.

End

Leave blank to go to the end. With several files, the same range is applied to each.

Files never leave this device. Privacy policy

Result

Upload a MKV file and click Convert. The MP3 file will appear here.

What to do next

Extract audio from video

Pull the audio out of any video format, with an optional start and end time.

Video to GIF converter

Turn a short moment from the same video into an animated GIF.

MP4 to MP3 converter

Save the audio from the most common video format as MP3.

How it works

Choose a MKV file and click Convert. The tool pulls the audio out of the video and saves it as MP3. Upload several files and they convert one after another. Save the results one at a time or as a ZIP.

Pick 128, 192 or 320kbps. For voice recordings, 128kbps in mono cuts the file size a lot. Enter a start and end time to save only that part.

Things to know

The browser decodes the audio itself, so if it does not recognize the codec inside the file, the conversion cannot run. The tool tells you why, and trying again in Chrome on a desktop usually works. If the video was recorded without audio, the tool tells you that too.

Long files use a lot of memory, so the limit is 60 minutes. If a large file stalls on a phone, try it on a computer.

Frequently asked questions

My MKV will not open.

MKV is only a container, and the audio inside differs from file to file. AAC, Opus, Vorbis and MP3 usually decode fine, but AC-3 and DTS, which are common in movie files, cannot be decoded by a browser. If it also fails in Chrome on a desktop, that is the reason.

Does converting to MP3 lower the quality?

MP3 is a lossy format, so the result is not identical to the source. At 192kbps or higher, most people cannot hear a difference. Since the source audio is usually compressed already (AAC, for example), a higher bitrate will not make it sound better than the original.

Are my files uploaded to a server?

No. Decoding and converting happen entirely in this browser, and the file never leaves your device. The result disappears when you close the page, so use the save button to download it.