mka
Matroska Audio
Matroska carrying sound alone. Common for audiobooks and for music ripped with chapters, because it can hold several tracks and chapter marks in one file.
Convert MKA to OPUS
Free, no account, no watermark. Converted on our servers, then deleted.
Drop an MKA file here
As many as you like. We will show you what they convert to.
How to convert MKA to OPUS
- 1
Choose your file
Drop an MKA file onto the converter, or pick one from your device. You can add several at once.
- 2
Select OPUS
Pick OPUS as the output format. Open Settings if you want to control the audio codec, the audio bitrate, and the sample rate, and 2 more.
- 3
Download the result
Convert and download the finished file. No account, and nothing to install.
opus
Opus
The best general-purpose lossy codec available today, especially at low bitrates. Standard for voice chat.
MKA to OPUS, asked and answered
Does converting MKA to OPUS lose quality?
Yes. MKA has already discarded some detail and OPUS discards more, because re-encoding starts from what survived the first pass rather than from the original. If you need every detail kept, convert to WAV instead.
Can I convert the OPUS back to MKA?
Yes, and the file will open — but a round trip is not free. Each pass re-encodes, so going MKA to OPUS and back leaves you with less than you started with.
What can I change about the OPUS it produces?
You can set the audio codec, the audio bitrate, the sample rate, mono or stereo, and where it starts and stops. Anything left on Auto is decided by the encoder, which is usually the right answer unless you are targeting a specific size or device.
Where does the conversion happen?
On our server. The file is sent over HTTPS and converted in a sandbox with no network access of its own; your input and the result go together, removed at once if it fails and otherwise kept for a few minutes so you can download them, then deleted — whether or not you did. There are no accounts for anything to be kept against.
Is there a limit on file size?
Yes — there is a per-file cap and an hourly job limit, because this runs on one small server. The API page states the limits currently in force rather than a number baked into this page.