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Convert MKV to AAC

Extract the audio from MKV videos and save it as AAC — ideal for efficient music files and broadcast audio.

  • 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 AAC

    1. 1

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

    2. 2

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

    MKV vs AAC

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

    MKVAAC
    Full nameMatroska VideoAdvanced Audio Coding (raw ADTS)
    TypeVideoAudio
    CompressionLossyLossy
    Developed byMatroska.orgMPEG
    Introduced20021997
    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 AAC

    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.

    AAC: AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.

    Frequently asked questions

    How do I convert MKV to AAC on my phone?
    Open this page in your phone's browser (Safari, Chrome, Samsung Internet), tap Choose files, pick your MKV, make sure AAC is selected and tap Convert. The AAC file is saved to your Downloads.
    Will converting MKV to AAC reduce quality?
    Only the sound is kept — the picture is dropped, so the AAC 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 AAC 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 ALACMKV to WAVMKV to FLACMKV to OGGMKV to OPUSMKV to WEBAMKV to WMAMKV to AIFFMKV to AC3MKV to CAF

    Convert other formats to AAC

    MP3 to AACM4A to AACM4R to AACALAC to AACWAV to AACFLAC to AACOGG to AACOPUS to AACWEBA to AACWMA to AACAIFF to AACAC3 to AACCAF to AACAMR to AAC3GA to AACAPE to AACMP4 to AACMOV to AACWEBM to AACAVI to AACFLV to AACWMV to AAC3GP to AACM4V to AACMPG to AACTS to AACGIF to AACMTS to AACVOB to AACHEVC to AACRMVB to AAC

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