EN TR
  1. Home
  2. Video converter
  3. WEBM to MKV

Convert WEBM to MKV

Counter WEBM → MKV
Drop your files here .webm

    iPhones, some TVs and editing programs struggle to open WebM videos. MKV is a flexible container that plays happily in VLC and media servers.

    • Free
    • No sign-up
    • Batch conversion

    Why convert WEBM to MKV?

    To convert WEBM files to MKV, drop them on the counter above.

    Most files convert in seconds: no queue, no email address, and the MKV result saves straight to your computer or phone.

    How to convert WEBM to MKV

    1. Add your WEBM files

      Drag your WEBM files onto the counter or pick them with Choose files. You can add several at once.

    2. Check the settings

      The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.

    3. Conversion starts by itself

      Each file is converted to MKV and its row is stamped CONVERTED.

    4. Download your MKV file

      Get the file with Download. With several files you can download them all as one ZIP.

    WEBM vs MKV

    PropertyWEBMMKV
    Full nameWebMMatroska Video
    TypeVideoVideo
    CompressionLossyDepends on codec
    Created byGoogleMatroska
    Year20102002
    Extensions.webm.mkv
    MIMEvideo/webmvideo/x-matroska

    About the formats

    WEBM

    WebM

    WebM is the open video format Google built for the web. It carries VP9 or AV1 video with Opus audio, and screen recordings and videos recorded in the browser are often WebM.

    All WEBM conversions

    MKV

    Matroska Video

    MKV (Matroska) is a flexible video container that can hold several audio tracks, subtitles and chapters in one file. It is common in film collections and OBS recordings.

    All MKV conversions

    Frequently asked questions

    Is converting WEBM to MKV free?

    Yes, completely free. No account, no daily limit, no watermark and no queue.

    Does it work on a phone?

    Yes. It works on iPhone, iPad and Android, with no app to install.

    Is there a file size limit?

    There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.

    Other conversions
    Family Give → Get What you gain
    MKV WEBM light video for the web
    WEBM MP4 plays everywhere
    WEBM GIF silent loop
    WEBM MP3 sound only, plays on every device
    WEBM MOV Apple and video editors
    WEBM AVI works with old players
    WEBM WAV sound only, lossless, ready to edit
    WEBM M4A sound only, better than MP3 at the same size
    MP4 MKV multiple audio and subtitles · phone video
    MOV MKV multiple audio and subtitles · iPhone video
    AVI MKV multiple audio and subtitles · old camcorder footage
    WMV MKV multiple audio and subtitles · Movie Maker video
    FLV MKV multiple audio and subtitles · Flash-era video