Audio options
Your files are converted inside your browser and are never uploaded to any server.
MKV is the flexible open container for HD video — it can hold multiple audio tracks, chapters and subtitles in one file. Extract any MKV’s audio as MP3 with no software to install.
MKV to MP3 Converter →MP3 is the universal audio format — it plays on every phone, car stereo and speaker, at roughly a tenth the size of WAV. The perfect pocket-sized home for your video’s audio.
MP4 to MP3 Converter →MP4 is the world’s most popular video container. It packs video, audio, subtitles and images into a single file, perfect for sharing videos online — and for pulling the audio track out as an MP3.
MP4 to MP3 Converter →WAV stores sound uncompressed, in its purest form. The files are huge — converting WAV to MP3 keeps the quality you need at a fraction of the size.
WAV to MP3 Converter →M4A is the standard audio format for Apple devices and music apps. It sounds great, but not every player supports it — M4A to MP3 makes your audio play everywhere.
M4A to MP3 Converter →MKV is the enthusiast’s video format — flexible, high-quality, and everywhere in movie collections and downloads. Our free MKV to MP3 converter extracts the audio right in your browser. Your file never leaves your device: no upload, no sign-up.
How to convert MKV to MP3
1. Drop your MKV file into the converter above (up to 200 MB). 2. Choose your quality — 192 kbps is ideal for most listening. 3. Press Convert to MP3 and download. One honest note: your browser needs to be able to play the MKV’s audio track. If it can play it, we can convert it.
Why turn MKV audio into MP3?
MKV files bundle video, multiple audio tracks, and subtitles — overkill when you only want the sound. MP3 strips all that away into a small, universal file. Perfect for audiobooks, music videos, or lectures trapped inside big video files.
MKV to MP3 FAQs
Why would I convert MKV to MP3?
To keep just the audio. An MKV movie might be 2 GB; its soundtrack as MP3 is a few megabytes and plays on any device.
Is my file uploaded to a server?
No. The whole conversion runs in your browser — your file never leaves your device.
My MKV won’t convert. Why?
Some MKV files use exotic audio codecs that browsers can’t decode. If your browser can’t play the audio, we can’t convert it. Try a file with standard AAC or MP3 audio inside, or re-encode it with a desktop tool first.
What’s the maximum file size?
200 MB. Big MKV movies often exceed this — trim or split them first, or convert a smaller clip.
More free converters
Every tool below runs 100% in your browser — your files are never uploaded anywhere.