MKV to FLAC Converter

Batch convert mkv files to flac online. Change mkv to flac on Windows, Mac, iPhone and Android in 2 clicks.

Select files for conversion or drag and drop them to the upload area.
Your files are securely protected and available only to you.
All files are automatically deleted from our servers after 1 hour.

How to convert MKV files to FLAC online?

Step-by-step instructions for converting mkv files to flac

Upload MKV-file

Click "Choose File" button to select a mkv file on your computer. MKV file size can be up to 100 Mb.

Convert MKV to FLAC

Click "Convert" button to start conversion.

Download your FLAC

When the conversion process is complete, you can download the FLAC file.


  • ❓ How can I convert MKV to FLAC?
    First you need to add file for conversion: drag and drop your MKV file or click the "Choose File" button. Then click the "Convert" button. When MKV to FLAC conversion is completed, you can download your FLAC file.
  • ⏱️ How long does it take to convert MKV to FLAC?
    Video conversion takes quite a while. It will probably take you a few minutes to change MKV to FLAC.
  • 🛡️ Is it safe to convert MKV to FLAC on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including MKV to FLAC) is absolutely safe.
  • 💻 Can I convert MKV to FLAC on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our MKV to FLAC converter works online and does not require software installation.

Information about MKV and FLAC file formats

Full name MKV - Matroska FLAC - Free Lossless Audio Codec
File extension .mkv, .mk3d, .mka, .mks .flac
MIME type video/x-matroska, audio/x-matroska audio/x-flac
Developed by Xiph.Org Foundation
Type of format Container format Audio
Description The Matroska Multimedia Container is an open standard free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows. FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio and is also the name of the reference codec implementation. Digital audio compressed by FLAC's algorithm can typically be reduced to 50-60% of its original size and decompress to an identical copy of the original audio data.
Technical details Matroska is similar in concept to other containers like AVI, MP4, or Advanced Systems Format (ASF) but is entirely open in specification, with implementations consisting mostly of open-source software. The technical strengths of FLAC compared to other lossless formats lie in its ability to be streamed and decoded quickly, independent of compression level. Compared to compressed audio formats, FFmpeg's FLAC implementation was noted to have the fastest and most efficient embedded decoder of any modern lossless audio format.
File conversion MKV conversion FLAC conversion
Associated programs VLC Media Player Windows 10, Android, Blackberry 10 and Jolla devices.
MKV to FLAC conversion quality rating:
4.4 (1536 votes)
You need to convert and download at least 1 file to leave a rating!