Convert MKV to AC3
Extract the audio from your MKV video files and save it as AC3, directly in your browser.
How to convert video to audio in 3 steps
Choose a MKV video file.
Click convert to AC3.
Download your AC3 audio.
Format descriptions
MKV — MKV (Matroska) is a flexible open-source video container that supports multiple video, audio and subtitle tracks in a single file.
AC3 — AC3 (Dolby Digital) is the standard audio codec for DVD, Blu-ray and home theater. It supports up to 5.1 channels of surround sound.
Technical comparison: MKV vs AC3
Technical breakdown of the MKV and AC3 specifications: compression, colour, transparency and animation support.
| Property | MKV | AC3 |
|---|---|---|
| Specification | MKV (Matroska Multimedia Container) | AC3 (Dolby Digital Audio Codec) |
| Media type | Video | Audio |
| Compression | Hybrid (lossy or lossless) · H.264 / HEVC / VP9 / AV1 | Lossy · AC-3 (up to 5.1) |
| Color space / bit depth | 8/10/12-bit HDR | 16/20/24-bit 5.1 |
| Transparency | Not applicable | Not applicable |
| Animation | Yes (animated) | No (static) |
| Best for | MKV (Matroska) is a flexible open-source video container that supports multiple video, audio and subtitle tracks in a single file. | AC3 (Dolby Digital) is the standard audio codec for DVD, Blu-ray and home theater. It supports up to 5.1 channels of surround sound. |
What happens when converting MKV to AC3?
The MKV data is decoded inside your browser with WebAssembly and re-encoded to the AC3 specification, so no file is ever uploaded to a server. AC3 uses lossy compression: the file gets far lighter, but a small amount of fine detail is discarded in the process. MKV supports animation while AC3 does not, so only the first frame is kept. Audio is re-encoded with the AC3 codec while keeping the original duration, so audio and video stay in sync.
Frequently Asked Questions
What is video to audio conversion?
Video to audio conversion extracts the sound track from a video file, for example from MKV to AC3, keeping only the audio content.
Are my video files uploaded?
No. This tool processes video files directly in your browser. Your video files are never sent to a server.
Which video formats are supported?
This tool converts the audio of MKV video files to AC3, all in your browser.
Is it really free and unlimited?
Yes, the tool is completely free and you can convert as many videos as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Which format will the result be in?
The converted file will always be in AC3 format, ready to download and use.
About the video to audio converter
Extract and convert the audio from your MKV videos to AC3 for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
See also:
- Video to Audio Converters
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- Convert MKV to MP3Extract and convert the audio from your MKV videos to MP3 for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert MKV to WAVExtract and convert the audio from your MKV videos to WAV for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert MKV to OGGExtract and convert the audio from your MKV videos to OGG for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.