Convert WEBM to MKV Online — Free & Fast | AnyConv

WEBM to MKV Converter

Quickly convert multiple webm files to mkv — free & online.

Drag & drop your files here or click to upload

How to convert WEBM to MKV online

Follow these simple steps to convert webm files to mkv using AnyConv. It works on all devices — Windows, Mac, Linux, iPhone, Android.

Upload your WEBM file

Drag & drop your file into the upload area. You can also click to select it manually. Max file size: 100 MB.

Start converting

Hit the “Convert” button to turn your WEBM into MKV. The process usually takes just a few seconds.

Download your MKV

Once ready, download your converted file instantly. The download link is private and only works on your device.

What is a WEBM file?

WEBM is an open, royalty-free video format designed for the web, developed by Google. It uses the VP8 or VP9 video codec and the Vorbis or Opus audio codec, optimized for fast streaming and web integration.

WEBM is widely supported by modern browsers and platforms like YouTube. It delivers high-quality video with efficient compression, making it perfect for online playback.

How to open WEBM files

WEBM files are supported by all major web browsers (Chrome, Firefox, Edge) and media players like VLC. They are ideal for embedding videos on websites.

Use AnyConv to convert WEBM to MP4 or MOV for offline use or editing.

Key facts about WEBM

  • Full name: Web Media File
  • Extension: .webm
  • MIME type: video/webm
  • Developed by: Google
  • Initial release: 2010

Useful links and resources

What is a MKV file?

MKV (Matroska Video) is a flexible, open-standard container format capable of holding unlimited video, audio, subtitle tracks, and metadata. It’s popular for high-quality video content, including HD and Blu-ray rips.

MKV is widely supported and ideal for movies, series, and complex media projects. It’s open-source and favored for its advanced features and strong compression support.

How to open MKV files

MKV files are supported by VLC, MPC-HC, KMPlayer, and many smart TVs and media servers. It's a preferred format for high-definition video and multiple tracks.

Use AnyConv to convert MKV to MP4 or another format for broader compatibility.

Key facts about MKV

  • Full name: Matroska Video File
  • Extension: .mkv
  • MIME type: video/x-matroska
  • Developed by: Matroska.org
  • Initial release: 2002

Useful links and resources

Convert from WEBM

Need to change your WEBM files to a different format? Below are all the available tools to help you turn WEBM into the format you need.

Convert to MKV

Want to get a file in MKV format? Choose the original format you’re starting with — AnyConv can quickly convert dozens of file types into MKV.

❓ Frequently Asked Questions

Answers to common questions about converting WEBM to MKV
  • Do I need to register to convert WEBM files?
    Not at all! You can convert WEBM to MKV without signing up or installing anything.
  • Is it safe to convert WEBM to MKV on AnyConv?
    Absolutely. All WEBM and MKV files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
  • Will the quality change after converting WEBM to MKV?
    We do our best to preserve the original quality during WEBM to MKV conversion. The result is accurate and clean.
  • How long does it take to convert WEBM to MKV?
    Most conversions from WEBM to MKV take just a few seconds — even for larger files.
  • Can I upload more than one WEBM file?
    Yes, batch conversion is supported. You can convert multiple WEBM files to MKV at once — fast and easy.
  • What browsers support WEBM to MKV conversion?
    All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting WEBM to MKV on any platform.
WEBM to MKV – User Rating
4.1 (1071 votes)
Please convert and download a file before leaving a rating.