Fix Missing Audio When Playing MKV Files in Chrome

Your MKV plays in Chrome but no sound comes out. That usually means Chrome can decode the video track but not the audio inside the file, or the site playing it is muted in Chrome's sound settings.

Play the same file in a desktop media player and check the sound permission for the site. If it is silent everywhere, convert the audio to AAC inside an MP4 container.

In this guide, I have covered:

Find out whether Chrome or the MKV is the problem

Your MKV plays, the picture looks right, and the speakers stay quiet. That narrows things down to two suspects: Chrome cannot decode the audio track inside the file, or something outside the file is muting Chrome.

An MKV is a container, not a codec. It can hold almost any mix of video and audio streams, so Chrome may render the picture perfectly while having no decoder for the audio track sitting next to it.

Start by playing the same MKV in a trusted desktop media player. Sound there means the file is fine and the fault lies with Chrome or the page serving the video. Silence there too means the audio track is damaged or encoded in a way most players struggle with.

Check Chrome’s sound permission for the site

Watching an MKV from a website rather than from your hard drive? Chrome may be blocking sound for that one site while every other tab works normally.

1. Open Chrome’s Settings page.
2. Select Privacy and security, then Site settings.
3. Select Sound.
4. Find the website playing the video and set Allow.
5. Reload the video page and press play again.

If the site is not listed yet, open it in Chrome and change its Sound entry from Block to Allow once it appears. Chrome usually asks for permission the first time a site tries to play audio.

You’ll know it worked when the same video suddenly has sound and the rest of your tabs behave as before.

Changing the site sound setting will not add a missing audio codec to a local MKV file. If the video is silent in a desktop media player as well, skip ahead to the file and codec checks below.

Rule out the system sound mixer

Chrome is not always the one holding back the sound. The operating system can mute or route audio per application, so check the mixer before you touch the file.

1. Open the system sound mixer for the computer.
2. Check the volume level for Chrome and the active output device.
3. Mute any other applications that are not needed.
4. Set the active output device to the speakers or headphones you want to use.
5. Play a known sound in another Chrome tab to confirm that Chrome can output audio.

If regular videos are silent too, set the MKV aside and fix the mixer first. If normal videos have sound, come back to the file-specific checks.

Update Chrome and play the MKV again

Still silent after those checks? An open tab can keep using an old media component long after an update lands, so update Chrome and restart it fully.

1. Open Settings, then About Chrome.
2. Select Check for updates if an update is available.
3. Close every Chrome window.
4. Open Chrome again and play the MKV from its original location.

Test with a short clip where you can. When the same MKV stays silent but a recent MP4 plays fine, the problem tracks with the file’s audio format rather than with Chrome’s general output.

Check which audio codec the MKV uses

Time to look inside the file. Open the MKV in a media information tool that lists its streams, or compare it with an MP4 that already plays with sound.

Read the audio codec name: AAC, MP3, Opus, Vorbis, AC-3, or DTS. Chrome’s codec support depends on the browser build and the operating system’s media components. No sound setting, volume slider, or permission inside Chrome can make the browser decode an audio format it does not support.

Play a short MP4 with H.264 video and AAC audio as a control test. If it has sound, keep that file nearby as your known-good reference while you deal with the MKV.

Convert the MKV to an MP4 with AAC audio

When the audio track is the problem, converting is the fix. Pair H.264 video with AAC audio inside an MP4 container and Chrome will play it on almost any machine. The original MKV stays untouched.

1. Install or open a trusted desktop video converter that supports MKV input and MP4 output.
2. Add the MKV file to the converter.
3. Choose MP4 as the output format.
4. Select H.264 for the video codec and AAC for the audio codec.
5. Keep the original resolution and frame rate unless the file will not play on your computer.
6. Choose a new file name and destination folder.
7. Start the conversion and wait for it to finish.
8. Open the converted MP4 in Chrome and confirm that both video and sound work.

If the converter leaves the sound track disabled, enable the source audio track before you start. When the tool offers separate remux and transcode options, choose transcode, because a remux keeps the original audio codec that Chrome could not decode.

ALERT: Keep the original MKV until you have checked the converted file. Conversion can shave a little quality, and some poorly supported source codecs need software decoding.

Try a Chrome extension only if you must keep the MKV

You want to keep the MKV exactly as it is and still watch it in Chrome. Some extensions ship their own media player and handle formats Chrome cannot, which makes them tempting.

Treat that as a workaround, not a cure. Install only from the Chrome Web Store, check who publishes the extension and what it can access, and remove anything you do not trust.

1. Open chrome://extensions in Chrome.
2. Review the extensions that are currently installed.
3. Disable extensions that could block playback or sound.
4. Reopen the MKV in a fresh tab and test it again.

Extension playback support changes between versions, and some cannot open local files at all. If the extension gives you picture but still no sound, convert the file instead.

RELATED: How to Install Chrome Web Store Extensions in Microsoft Edge

Open a desktop player when you just want to watch

If the goal is to watch the video tonight, a dedicated desktop media player gets you there faster than any Chrome troubleshooting. It plays MKV natively, codec support is far wider, and nothing depends on site permissions.

Keep Chrome for the converted MP4 and for everything else on the web. If the MKV has to live inside a web app in its original format, hand the app a compatible MP4 copy whenever its upload accepts one.