Online MKV to FLAC converter | Free GroupDocs Apps

GroupDocs Products
Conversion App
Convert MKV to FLAC

By uploading your files or using our service you agree with our Terms of Service and Privacy Policy.

We have already processed 5,839,344 files with total size of 9,549,640 Mbytes

Convert MKV to FLAC files online with our free video converter app. No matter your platform — Windows 10, Mac or iPhone — you can convert MKV audio files with any resolution rapidly.

The most popular video formats are MP4, AVI, MKV, and MOV. MP4 is the most widely supported, balancing quality and file size, while AVI and MKV offer flexibility for high-quality playback, and MOV is optimized for Apple devices. Video files can be edited using video editing software such as Adobe Premiere Pro, Final Cut Pro, or DaVinci Resolve.

Change MKV to FLAC in seconds — drop your file into the upload form, pick FLAC as the output, and hit Convert. Download the result video file right after conversion.

Check our video

MKV

Matroska Video file format

MKV (Matroska Video File) is an open, flexible multimedia container format designed to store video, audio, subtitles, and metadata in a single file. It is widely supported by media players like VLC, MPC-HC, and tools such as MKVToolNix for editing and muxing. The format uses EBML (Extensible Binary Meta Language) for its structure, enabling advanced features like chapter support, multiple audio tracks, and seamless streaming capabilities.

FLAC

Free Lossless Audio Codec

FLAC (Free Lossless Audio Codec) is an open-source audio format designed for lossless compression, preserving original audio quality while reducing file size. It is widely supported by media players like VLC, Foobar2000, and streaming platforms such as Tidal, and can be created or converted using tools like Audacity or XLD. FLAC files use metadata tagging (e.g., ID3, Vorbis comments) and support high-resolution audio, multichannel audio, and optional error-checking for data integrity.

How it works

How to convert MKV to FLAC

Step 1

Click inside the file drop area to upload MKV file or drag & drop MKV file.

Step 2

Click on Convert button. Your MKV files will be uploaded and converted to FLAC result format.

Step 3

Download link of result files will be available instantly after conversion.

Step 4

You can also send a link to the FLAC file to your email address.

FAQ

Questions & Answers

Does this MKV to FLAC converter work on Linux, Mac, or Android?

Yes! Our online converter runs on any operating system with a web browser. No software installation is needed—just upload your MKV and convert it instantly.
Is my data secure when converting a MKV to FLAC?

Absolutely! Your files are processed securely. The FLAC download link is available immediately after conversion, and all uploaded files are automatically deleted after 24 hours. No one else can access your files.
Is there an API for MKV conversion?

Yes! TheGroupDocs.Conversion API allows you to convert documents across multiple formats on .NET, Java, Python, and Node.js platforms.
Which browser is best for converting MKV files?

You can use any modern browser, such as Google Chrome, Firefox, Opera, or Safari, to convert your MKV files seamlessly.
How long do you keep my files on your servers?

Your files are stored securely on GroupDocs servers for 24 hours. After that, they are automatically deleted.

Other Supported Conversions

You can also convert MKV into many other file formats. Please see the complete list below.

MKV TO MP4
MPEG-4 file format
MKV TO AVI
Avi file format
MKV TO FLV
Flash Video file format
MKV TO MKV
Matroska Video file format
MKV TO MOV
QuickTime file format
MKV TO WEBM
WEBM file format
MKV TO WMV
WMV file format
MKV TO MP3
MP3
MKV TO AAC
Advanced Audio Coding
MKV TO AIFF
Audio Interchange File Format
MKV TO M4A
M4A file format
MKV TO WMA
WMA file format
MKV TO AC3
AC3 file format
MKV TO OGG
OGG file format
MKV TO WAV
WAV file format

More apps