How to convert Matroska (MKV) to MP3
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Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
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Convert Matroska (MKV) to MP3
NexMedia converts Matroska (MKV) to MP3 on its own servers. Processing time depends on the file size and how busy the queue is.
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Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About Matroska (MKV)
Matroska (MKV) is an open container format that can hold almost any video and audio codec, any number of audio and subtitle tracks, chapters and attachments.
It is popular for films and series with several audio languages and subtitle tracks, and for archiving video.
Many phones, browsers and TVs do not play MKV files directly, even when they support the codecs inside.
Convert MKV to MP3 online free, no account required — MP3 is a universally supported lossy audio format.
Change MKV to MP3 without losing quality — convert MKV to MP3 free in your browser.
Why won't my MKV file play on my TV or phone? Most TVs and phones play MP4 or H.264 but not the Matroska container, so converting to MP4 makes the file playable on almost any device.
About MP3
MP3 (MPEG-1 Audio Layer III) is a lossy audio format from the early 1990s. It removes the sound listeners are least likely to notice, typically at 128 to 320 kbit/s.
It plays on virtually every device and app, which makes it the default for music files, podcasts and audiobooks.
MP3 tops out at 320 kbit/s and two channels, and every re-encode removes a little more detail.
Why convert music to MP3? Every device, car stereo and app made in the last 25 years plays it, so nothing and nobody is left out.
What changes when you convert MKV to MP3
- The soundtrack of the MKV is re-encoded as MP3 at the default settings, so it is close to the original but not bit-identical.
- Only the sound is kept: the MP3 file contains the audio track of your MKV, and the picture is dropped.
Settings you can change
Before you convert MKV to MP3, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted MP3 file is kept for 2 hours, then deleted.
MKV to MP3: questions and answers
Does converting MKV to MP3 reduce quality?
The soundtrack of the MKV is re-encoded as MP3 at the default settings, so it is close to the original but not bit-identical.
What is the difference between MKV and MP3?
MKV is a flexible open container for video with any number of audio and subtitle tracks. MP3 is a universally supported lossy audio format.
Can I change the settings when converting MKV to MP3?
Before you convert MKV to MP3, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert MKV to MP3?
No. You can convert MKV to MP3 without an account; signing in raises the file-size and daily limits.
How long is my converted MP3 file kept?
The MP3 file you convert from MKV is kept for 2 hours, then deleted automatically.
When I convert MKV to MP3, can I keep just the sound?
Only the sound is kept: the MP3 file contains the audio track of your MKV, and the picture is dropped.
Will converting MKV to MP3 change my original file?
No. The conversion reads your MKV and writes a new MP3 file, leaving your original MKV file untouched.