MKV to MP4

  • Step 1: Select your MKV video and upload it. Large files over 1 GB are welcome.
  • Step 2: We start converting automatically. If your MKV already uses H.264 video and AAC audio, the process is lossless and very fast.
  • Step 3: Download the MP4. If playback fails on your device, try Expert Settings with H.264 video and AAC audio.

  • settings
    Audio Codec:
    Video Codec:
    Resolution:
    Expert Settings: Customize options

    • MKV 2 MP4

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    Fast MKV to MP4 for big files

    Select your MKV and Converter App starts converting immediately with no queue or install. When the tracks are already MP4-compatible, your download is ready in seconds.

    Lossless when your MKV is MP4 ready

    If your MKV uses H.264 video and AAC audio, we remux to MP4 with zero quality loss. MKVs with 10-bit H.264, HEVC, DTS, or other unsupported tracks are re-encoded to H.264/AAC for smooth playback.

    Free to use

    Converter App is free to use, with no sign-up, no watermarks, and no artificial limits beyond fair use.

    Built for large MKVs

    Upload videos well over 1 GB; we process one file at a time so you can submit the next as soon as your download finishes. Keep the tab open to monitor progress without interruptions.

    Smart settings for reliable playback

    Choose H.264 video with AAC audio for the best device support; use H.265 for smaller files on newer hardware or VP9 for web use. MP4 will not keep MKV chapters and some subtitles, so prefer SRT soft subs and pick the main audio track.

    Privacy first

    Your files are processed securely and deleted automatically after conversion. We do not inspect your videos and we do not share them.

    MKV to MP4 Online: Further Instructions

    In most cases, the three steps above are enough for getting a great result with our MKV to MP4 online converter. If you want a specific video or audio codec for your MP4 output simply click on "Expert Settings" and choose the desired codec there. The available codecs are:

    Audio Codecs

    • AAC
    • OPUS
    • MP3

    Video Codecs

    • VP9
    • H.264
    • H.264

    Choosing a codec by hand is only recommended if your target device cannot play the video created by our converter. Otherwise, the default settings give the best result. If you do not know which codecs to choose take: AAC/H.264.

    Alternative Method: MKV to MP4 with VLC

    Usually, an online converter is the best choice for your video conversion; If you want to do the conversion on your local computer, we also have an MKV to MP4 converter download recommendation for you: The VLC Media Player.

    VLC is a free, open-source video player that can convert videos between different formats. The tool is available for MAC, Linux, and Windows; To convert MKV to MP4, VLC includes its own video converter. We assume here that you already have a VLC installation on your system:

    MKV to MP4 with VLC

    1. Open VLC and click: Media and then Convert/Save in the drop-down menu.

    2. In the dialogue click "Add" to select the MKV video you want to convert. You can add one or more videos.

    3. Next, click the "Convert/Save" button.

    4. Now select the profile "Video - H.264 + MP3 (MP3)" in the settings field.

    5. After selecting the profile click browse to define an output file name and then "Start".

    Video Tutorial

    Our video tutorial above explains both approaches, the usage of our online video converter and VLC for converting MKV to MP4. The video is in English, and the explanations about VLC start at 1:20.

    MKV vs. MP4

    Both, MKV and MP4 are container formats for video and audio data and subtitles. The following table compares the most important features of both formats.

    The MKV Format

    Name Matroska video
    Extension .mkv
    MIME Type(s) video/x-matroska
    Description An MKV file is a video file saved in the Matroska multimedia container format. It supports several types of video and video codecs and may include SRT, SSA, USF (Universal Subtitle Format), or VobSub subtitles. MKV files are typically used for storing short video clips, TV shows, and movies.
    Tools

    The MP4 Format

    Name MPEG-4 Part 14
    Extension .mp4
    MIME Type(s) video/mp4
    Description The MP4 file extension stands for the MPEG-4 video file format. MP4 is a very common video file format used for downloading and streaming videos across the internet.
    Tools

    Further Converters for MKV and MP4

    Convert from MKV

    With Converter App, you can convert MKV files into many other formats:

    MKV to MOV  |  MKV to MP3  |  MKV to WEBM  |  MKV to AVI  |  MKV to SRT  |  MKV to M4A  |  MKV to WMV  |  MKV to TEXT

    → All MKV Converters

    More for MP4s

    If you want to keep working with your final MP4, try:

    MP4 to MP3  |  MP4 to GIF  |  MP4 to JPG  |  MP4 to WEBM  |  MP4 to MOV  |  MP4 to SRT  |  MP4 to TXT  |  MP4 to MKV

    → All MP4 Converters

    MKV to MP4 converter quality rating

    + + + + + 4.9 / 5   (based on  940  reviews )

    You can submit your review after uploading and editing at least one file!