MKV
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FLAC

Convert MKV to FLAC Online

Convert MKV to FLAC online. Start with free daily conversions, no install, no watermarks, and visible job status.

MKV to FLAC Converter

Upload your MKV file to convert it to FLAC format

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Per File

100 MB

Total Queue

0 B / 500 MB

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How to Convert MKV to FLAC

Follow these simple steps

1

Step 1: Upload Your File

Upload your MKV file by dragging and dropping or clicking to browse

2

Step 2: Select Output Format

FLAC is automatically selected as the output format

3

Step 3: Start Conversion

Click the Convert button to start the conversion

4

Step 4: Download Result

Download your converted FLAC file when ready

Convert MKV to FLAC - Complete Guide

Converting MKV to FLAC turns a video file into an audio file. MKV is a flexible video container format often used for high-quality video, subtitles, and multi-track media. FLAC is a lossless audio format used for high-quality music archives without the large size of raw audio. Below is exactly what changes when you convert MKV to FLAC, what is preserved, and when FLAC is — or isn't — the right target format.

What changes when you convert MKV to FLAC

  • This is a video-to-audio conversion, so the file moves into a different type of workflow. The converter maps the MKV content into a usable FLAC result for the formats involved.
  • Expect a smaller output file: FLAC is typically more space-efficient than MKV for the same content.

About the MKV format

MKV (Matroska Video) is a flexible container format that can hold multiple video, audio, and subtitle tracks. Our converter extracts and transforms MKV content.

  • Full name: Matroska Video
  • Developer: Matroska.org
  • Compression: Various (H.264, H.265, VP9)
  • Opens with: VLC, Plex, MKVToolNix

Where MKV is strong: stores multiple audio, video, and subtitle tracks; flexible, high-quality container.

Typical MKV uses: high-quality video libraries, multi-track and subtitled video.

About the FLAC format

FLAC (Free Lossless Audio Codec) offers CD-quality audio with file compression. It preserves every bit of audio data while reducing file sizes by 50-60% compared to WAV.

  • Full name: Free Lossless Audio Codec
  • Developer: Xiph.Org Foundation
  • Compression: Lossless compression
  • Opens with: VLC, foobar2000, most modern players

Where FLAC is strong: lossless quality at roughly half the size of WAV; supports rich metadata and cover art; ideal for archiving music.

Typical FLAC uses: hi-fi music archives, lossless backups of CDs, audiophile playback.

What FLAC keeps

  • FLAC adds: lossless quality at roughly half the size of WAV.

Things to watch out for

  • One FLAC limitation to keep in mind: larger than MP3.

When to convert MKV to FLAC

  • Convert MKV to FLAC for hi-fi music archives.
  • Convert MKV to FLAC for lossless backups of CDs.
  • Convert MKV to FLAC for audiophile playback.
  • Choose FLAC when a website, browser, or upload form rejects your MKV file.

MKV vs FLAC — format comparison

A quick side-by-side of the structural differences between MKV and FLAC, so you can confirm this is the right conversion for your file:

AttributeMKVFLAC
TypeVideo fileAudio file
CompressionFlexible (lossy or lossless)Lossless
Web-friendlyNoYes
Typical file sizeLargeMedium
Best forhigh-quality video librarieshi-fi music archives

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Other MKV Conversions

More formats you can convert MKV to

Convert MKV to MP4Convert MKV to WEBMConvert MKV to MOVConvert MKV to AVIConvert MKV to MP3Convert MKV to FLVConvert MKV to WMVConvert MKV to 3GPConvert MKV to MPEGConvert MKV to MPGConvert MKV to TSConvert MKV to OGVConvert MKV to 3G2Convert MKV to ASFConvert MKV to M4VConvert MKV to AACConvert MKV to WAVConvert MKV to OGGConvert MKV to M4AConvert MKV to WMAConvert MKV to AIFFConvert MKV to OPUS
View all MKV conversions →

Convert to FLAC

Other formats you can convert to FLAC

Convert MP4 to FLACConvert MOV to FLACConvert WEBM to FLACConvert AVI to FLACConvert M4V to FLACConvert FLV to FLACConvert WMV to FLACConvert 3GP to FLACConvert 3G2 to FLACConvert MPEG to FLACConvert MPG to FLACConvert TS to FLACConvert MTS to FLACConvert M2TS to FLACConvert VOB to FLACConvert OGV to FLACConvert ASF to FLAC
View all FLAC conversions →

Popular Related Conversions

Convert MKV to MP4Convert MKV to MP3

MKV to FLAC FAQ

Converting MKV to FLAC preserves the content faithfully; output also depends on the source file and any settings you choose.
Upload your MKV file, confirm FLAC as the output format, and click Convert. Job status is shown while the file is processed, then you can download the FLAC result.
Yes. You can start with free daily conversions, with no signup required for your first jobs and no watermarks on the output. Accounts and paid plans are available for higher-volume work.
No. The MKV to FLAC conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.
MKV is the Matroska multimedia container. It can contain video, audio, subtitles, and chapters in a single file.
MP4 is more widely compatible with devices, TVs, and media players than MKV.
When converting to formats that support subtitles, they can be preserved or burned into the video.
Yes! Our converter lets you choose which audio track to include in the converted file.
FLAC is a lossless audio format that compresses audio files without any quality loss. It's like ZIP for audio.
FLAC preserves all audio data (lossless), while MP3 removes some data to reduce size (lossy). FLAC is higher quality but larger.

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