Convert FLAC to MKV in bulk.
Large FLAC files are supported.

You can convert FLAC Learn more about FLAC files to

Video
Audio


How to convert FLAC to MKV?

You can convert FLAC to MKV with MConverter in three easy steps:
  1. Choose FLAC files from your device
    At the top of this page, drag and drop your FLACs.
    You can also click to select FLAC files using your operating system's file picker.
    Another method is to press the keyboard shortcut Ctrl+V (⌘+V on Mac) to paste a FLAC file you have copied to clipboard.
    Converting a folder with FLAC files to MKV is also supported: simply paste or drag and drop it.
  2. Click or tap on MKV from the list of target formats
    Alternatively, you can use the search field to quickly find the format you need, whether it's MKV or something else.
  3. Download your MKV files, after MConverter has finished processing them
    There's an option to automatically download the converted MKV files, so you don't have to press the download icon for each MKV.
    On desktop platforms, you can download the MKV files to a different folder by clicking on SAVE TO...
    You may see a share icon as well. Use it to directly share the MKVs with other apps.

About the formats

Extension flac
Category Audio file formats
Developed by Xiph.Org Foundation
Mime type audio/flac

Description

FLAC, or Free Lossless Audio Codec, files contain digital audio. FLAC files utilize lossless quality, meaning that there is no loss of any original sound data. When compared to MP3 (lossy audio format), FLAC files are generally larger. Nonetheless, FLAC’s lossless compression algorithm can reduce audio by up to 70%, and still be able to reproduce the original audio afterwards. The format is royalty-free.
Extension mkv
Category Video file formats
Developed by Matroska
Mime type video/x-matroska

Description

MKV files are MatrosKa Video files. Like the Russian Matryoshka doll, which contains multiple smaller dolls nested inside each other, the MKV format can contain multiple video, audio, and subtitle tracks inside a single file. This makes it convenient to have one video with a number of audio and subtitle tracks in different languages, all inside a single playable file.

Common questions about converting FLAC to MKV

Can I convert FLAC to MKV in bulk?

Yes, MConverter supports batch converting of multiple FLACs to MKVs simultaneously. You can even drag and drop folders containing FLACs to convert to MKV.
Pasting FLAC files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert a FLAC file to MKV, if its size is 1 GB?

Yes, with MConverter Premium you can convert big FLACs, up to 1 gigabyte each.
The free version lets you convert files up to 100 MB. If you need to convert FLAC files over 100 megabytes, try MConverter Premium.

Is converting FLACs to MKV safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your FLAC files are only accessible by you. 4 hours after the conversion completes, they are automatically deleted from MConverter’s servers. You can also delete your FLACs and other converted files immediately after finishing the conversion by clicking the bin icon.
Join others who have trusted us to convert over 3,661,532 files so far.

How long does it take to convert FLAC to MKV?

For most audio files, the wait is usually around a minute. However, MConverter also supports converting larger audio files, meaning that it could take a while (up to over an hour, for example).


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