Convert MKV to OPUS
Pull the soundtrack out of any MKV video and save it as OPUS in seconds. Conversion happens inside your browser, so even large or private videos are never uploaded.
Drop MKV files here
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more · Processed on your device - nothing is uploaded
How to convert MKV to OPUS
- Click "Choose files" or drag your MKV videos onto the page.
- Make sure "OPUS" is selected as the output format (128 kbps is a good default).
- Optionally click Edit to trim, adjust volume or add effects.
- Click Convert, then Download your OPUS files.
Why convert MKV to OPUS?
OPUS files are much smaller than video and play on any music player, phone or car stereo.
OPUS is best for voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes. All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC.
Will I lose quality?
The audio is decoded from the MKV video and encoded to OPUS. Choose a lossless format (WAV/FLAC) for zero loss, or a high bitrate for OPUS.
MKV vs OPUS
| MKV | OPUS | |
|---|---|---|
| Full name | Matroska Video | Opus Interactive Audio Codec |
| Type | video | lossy |
| Best for | films, TV recordings and archives | voice notes, WhatsApp/Discord audio, podcasts and streaming at small sizes |
| Typical size | varies | ~0.9 MB at 128 kbps per minute |
| Compatibility | VLC, Plex, Kodi, most modern players. | All modern browsers, Android, iOS 17+, WhatsApp, Discord, Telegram and VLC. |
| Developed by | - | IETF / Xiph.Org (2012) |
MKV to OPUS: questions
How do I convert MKV to OPUS?
Open this page, add your MKV file, make sure OPUS is selected as the output format and click Convert. Your OPUS file is ready to download in seconds.
Will converting MKV to OPUS lose quality?
The audio is decoded from the MKV video and encoded to OPUS. Choose a lossless format (WAV/FLAC) for zero loss, or a high bitrate for OPUS.
Is this MKV to OPUS converter free and safe?
Yes. It's free with no watermark or sign-up. Files are processed locally in your browser, so your audio is never uploaded or stored on our servers.
Can I convert many MKV files to OPUS at once?
Yes - add up to 5 files at a time on the free plan (unlimited with Pro), convert them all with one click and download them as a ZIP.
What is the difference between MKV and OPUS?
MKV (Matroska Video) is a video format, an open container that can hold many audio, video and subtitle tracks. OPUS (Opus Interactive Audio Codec) is a compressed (lossy) format: the most efficient modern lossy codec. Opus delivers excellent quality at very low bitrates for both speech and music.
Does it work on Mac, Windows, iPhone and Android?
Yes. The MKV to OPUS converter runs in any modern browser - Chrome, Safari, Edge or Firefox - on desktop and mobile. No software to install.