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Convert MKV to M4A

Extract the audio from MKV videos and save it as M4A — ideal for high-quality music and voice recordings for Apple and Android devices.

  • 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 M4A

    1. 1

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

    2. 2

      Check that M4A 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 M4A downloads automatically. Converting several files? Grab them all as a ZIP.

    MKV vs M4A

    Only the sound is kept — the picture is dropped, so the M4A file is far smaller than the MKV video. Phone videos usually carry AAC audio, so in Smart mode the M4A is extracted instantly with zero quality loss.

    MKVM4A
    Full nameMatroska VideoMPEG-4 Audio (AAC)
    TypeVideoAudio
    CompressionLossyLossy
    Developed byMatroska.orgApple / MPEG
    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 M4A

    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.

    M4A: M4A is an MPEG-4 container holding AAC audio. It sounds better than MP3 at the same size and is the default format for iPhone voice memos, Apple Music downloads and many Android recorders.

    Frequently asked questions

    How do I convert MKV to M4A on my phone?
    Open this page in your phone's browser (Safari, Chrome, Samsung Internet), tap Choose files, pick your MKV, make sure M4A is selected and tap Convert. The M4A file is saved to your Downloads.
    Will converting MKV to M4A reduce quality?
    Only the sound is kept — the picture is dropped, so the M4A file is far smaller than the MKV video. Phone videos usually carry AAC audio, so in Smart mode the M4A is extracted instantly with zero quality loss.
    Can I convert only part of the MKV?
    Yes. Open Advanced options → Trim and enter a start and end time.
    Is this MKV to M4A 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 M4RMKV to AACMKV to ALACMKV to WAVMKV to FLACMKV to OGGMKV to OPUSMKV to WEBAMKV to WMAMKV to AIFFMKV to AC3MKV to CAF

    Convert other formats to M4A

    MP3 to M4AM4R to M4AAAC to M4AALAC to M4AWAV to M4AFLAC to M4AOGG to M4AOPUS to M4AWEBA to M4AWMA to M4AAIFF to M4AAC3 to M4ACAF to M4AAMR to M4A3GA to M4AAPE to M4AMP4 to M4AMOV to M4AWEBM to M4AAVI to M4AFLV to M4AWMV to M4A3GP to M4AM4V to M4AMPG to M4ATS to M4AGIF to M4AMTS to M4AVOB to M4AHEVC to M4ARMVB to M4A

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