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Convert MKV to FLAC

Extract the audio from MKV videos and save it as FLAC — ideal for archiving CDs and hi-res music without quality loss.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android

    Quality
    Advanced options
    Trim (optional)
    Use minutes:seconds, e.g. 1:05.5

    How to convert MKV to FLAC

    1. 1

      Tap Choose files and select one or more MKV files (or drag them in).

    2. 2

      Check that FLAC is selected. Use Advanced options for bitrate, channels or trimming.

    3. 3

      Press Convert. Everything happens on your device — no upload, no waiting in a queue.

    4. 4

      Your FLAC downloads automatically. Converting several files? Grab them all as a ZIP.

    MKV vs FLAC

    Only the sound is kept — the picture is dropped, so the FLAC file is far smaller than the MKV video.

    MKVFLAC
    Full nameMatroska VideoFree Lossless Audio Codec
    TypeVideoAudio
    CompressionLossyLossless
    Developed byMatroska.orgXiph.Org
    Introduced20022001
    Plays on iPhone✕ No✓ Yes
    Plays on Android◐ Partly / with an app✓ Yes
    Plays on Windows✓ Yes✓ Yes
    Plays on Mac◐ Partly / with an app✓ Yes

    About MKV and FLAC

    MKV: MKV is a flexible open container that can hold unlimited video, audio and subtitle tracks. It is popular for movies and anime but isn't supported by iPhone or most TVs out of the box.

    FLAC: FLAC is an open lossless format that shrinks audio to 50–60% of WAV size without losing any quality. It is the favourite format of audiophiles and hi-res music stores.

    Frequently asked questions

    How do I convert MKV to FLAC on my phone?
    Open this page in your phone's browser (Safari, Chrome, Samsung Internet), tap Choose files, pick your MKV, make sure FLAC is selected and tap Convert. The FLAC file is saved to your Downloads.
    Will converting MKV to FLAC reduce quality?
    Only the sound is kept — the picture is dropped, so the FLAC file is far smaller than the MKV video.
    Can I convert only part of the MKV?
    Yes. Open Advanced options → Trim and enter a start and end time.
    Is this MKV to FLAC converter free?
    Yes — completely free with no limits on the number of files, no watermark and no account. The site is supported by ads.
    Are my files uploaded to a server?
    No. The converter runs inside your browser using WebAssembly, so your files never leave your device. That's also why it works for private and confidential recordings.

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    Convert MKV to other formats

    MKV to MP4MKV to MOVMKV to WEBMMKV to AVIMKV to FLVMKV to WMVMKV to 3GPMKV to M4VMKV to MPGMKV to TSMKV to GIFMKV to MP3MKV to M4AMKV to M4RMKV to AACMKV to ALACMKV to WAVMKV to OGGMKV to OPUSMKV to WEBAMKV to WMAMKV to AIFFMKV to AC3MKV to CAF

    Convert other formats to FLAC

    MP3 to FLACM4A to FLACM4R to FLACAAC to FLACALAC to FLACWAV to FLACOGG to FLACOPUS to FLACWEBA to FLACWMA to FLACAIFF to FLACAC3 to FLACCAF to FLACAMR to FLAC3GA to FLACAPE to FLACMP4 to FLACMOV to FLACWEBM to FLACAVI to FLACFLV to FLACWMV to FLAC3GP to FLACM4V to FLACMPG to FLACTS to FLACGIF to FLACMTS to FLACVOB to FLACHEVC to FLACRMVB to FLAC

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