MKV to MP3 Converter

Extract MP3 audio from MKV video files quickly online

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Settings

Select the bitrate range for the Variable Bitrate (VBR) MP3 file. Note that some legacy audio players may display incorrect audio file duration if VBR mode is used, in this case use CBR mode instead.
Set the constant bitrate for the audio track. Leaving this setting to "Auto" will automatically choose a bitrate to achieve a decent quality based on the source audio.
Set the number of audio channels. This setting is most useful when downmixing channels (e.g., from 5.1 to stereo).

mkv

MKV (Matroska Video) is an open-standard multimedia container format developed by the Matroska project, which announced the format in December 2002. Named after the Russian matryoshka nesting dolls, the format is built on the Extensible Binary Meta Language (EBML), a simplified binary variant of XML that provides a flexible and forward-compatible structure. MKV can hold virtually unlimited numbers of video, audio, and subtitle tracks within a single file, supporting codecs from H.264 and HEVC to VP9 and AV1 for video, and AAC, FLAC, Opus, and DTS for audio. A standout feature is comprehensive subtitle support, handling formats from simple SRT text to complex ASS styled subtitles and bitmap-based PGS tracks from Blu-ray discs. MKV also supports chapter markers, attachments (such as fonts needed for styled subtitles), and tagging metadata, making it one of the most feature-rich containers available. The open specification ensures that any developer can implement MKV reading and writing without licensing fees, which has driven widespread adoption across media players, streaming tools, and encoding software. The ability to encapsulate virtually any codec combination in a single, well-organized file has made MKV the preferred container for high-quality video distribution, archival, and personal media libraries.
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mp3

MP3 (MPEG-1 Audio Layer III) is one of the most widely used digital audio encoding formats. It uses a form of lossy data compression to significantly reduce file sizes while retaining near-CD-quality sound, typically achieving a 10:1 compression ratio. Developed by the Fraunhofer Society in collaboration with other digital scientists, the format became an international standard in 1993 as part of the MPEG-1 specification. MP3 files can be encoded at various bit rates, commonly ranging from 128 kbps to 320 kbps, allowing users to balance file size and audio fidelity. The format's efficient compression, broad device compatibility, and small file sizes made it the driving force behind the digital music revolution, enabling practical music storage and distribution over the internet. Today, MP3 remains one of the most universally supported audio formats across virtually all media players, operating systems, and portable devices.
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Rapid Extraction

Pulling audio from MKV skips video re-encoding entirely. The MP3 file is ready in seconds — far faster than a full video conversion.

Listen Anywhere

MP3 is the most widely supported audio format on the planet. Extract your MKV audio once and play it on virtually any device you own.

Cloud Processing

All conversion runs on remote servers. Your computer or phone does none of the heavy lifting — just upload the MKV and download the MP3.

How to convert MKV to MP3

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose mp3 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your mp3 file right afterwards

About formats

MKV (Matroska Video) is an open-standard multimedia container format developed by the Matroska project, which announced the format in December 2002. Named after the Russian matryoshka nesting dolls, the format is built on the Extensible Binary Meta Language (EBML), a simplified binary variant of XML that provides a flexible and forward-compatible structure. MKV can hold virtually unlimited numbers of video, audio, and subtitle tracks within a single file, supporting codecs from H.264 and HEVC to VP9 and AV1 for video, and AAC, FLAC, Opus, and DTS for audio. A standout feature is comprehensive subtitle support, handling formats from simple SRT text to complex ASS styled subtitles and bitmap-based PGS tracks from Blu-ray discs. MKV also supports chapter markers, attachments (such as fonts needed for styled subtitles), and tagging metadata, making it one of the most feature-rich containers available. The open specification ensures that any developer can implement MKV reading and writing without licensing fees, which has driven widespread adoption across media players, streaming tools, and encoding software. The ability to encapsulate virtually any codec combination in a single, well-organized file has made MKV the preferred container for high-quality video distribution, archival, and personal media libraries.
Developer: Matroska
Initial release: December 6, 2002
MP3 (MPEG-1 Audio Layer III) is one of the most widely used digital audio encoding formats. It uses a form of lossy data compression to significantly reduce file sizes while retaining near-CD-quality sound, typically achieving a 10:1 compression ratio. Developed by the Fraunhofer Society in collaboration with other digital scientists, the format became an international standard in 1993 as part of the MPEG-1 specification. MP3 files can be encoded at various bit rates, commonly ranging from 128 kbps to 320 kbps, allowing users to balance file size and audio fidelity. The format's efficient compression, broad device compatibility, and small file sizes made it the driving force behind the digital music revolution, enabling practical music storage and distribution over the internet. Today, MP3 remains one of the most universally supported audio formats across virtually all media players, operating systems, and portable devices.
Developer: Fraunhofer Society
Initial release: December 6, 1991

Frequently Asked Questions

Why convert MKV to MP3?

Extracting the audio track lets you listen to music, podcasts, or lectures from video files on any MP3-compatible player without the video data.

What can open MP3 files?

Every modern device plays MP3 natively — smartphones, computers, car stereos, portable players, and all major streaming applications support it.

Will all audio tracks be extracted?

The converter pulls the primary audio stream by default. If your MKV contains multiple tracks, you can select which one to extract as MP3.

What bitrate should I use?

For general listening, 192 kbps offers solid quality. Audiophiles may prefer 320 kbps, while voice recordings sound fine at 128 kbps or lower.

Is MKV to MP3 conversion fast?

Audio extraction is quicker than full video conversion since only the sound data is processed. Most files finish within seconds on convertio.tools.

MKV to MP3 Quality Rating

4.7 (47,844 votes)
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