WEBM to MKV Converter

Convert WEBM to MKV online, for free.

Or drop files here. Max file size is 2GB.

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Upload

Upload the file you want to convert. Drag & drop it onto the page or click the black button to select it from your device.

Convert

Your video is converting, this only takes a moment. Please keep the page open while it finishes in your browser.

Download

Click the “Download” button to save your converted file. It’s quick and easy with Convertiz!

Free Online WEBM Converter

Convert your WEBM videos to MKV format instantly with our free online video converter. No software needed, no sign-up required, everything runs directly in your browser for maximum speed, privacy, and convenience. Just drag and drop your WEBM file and start converting in seconds.

The MKV format offers excellent video quality and supports multiple audio and subtitle tracks, making it ideal for playback, editing, or archiving. Our tool works on all devices and never uploads your files, keeping your content 100% private. Fast, easy, and secure, convert now in just a few clicks.

WEBM to MP4 WEBM to MKV WEBM to AVI WEBM to MOV

What does the WEBM to MKV converter do?

This tool allows you to convert WEBM video files into the MKV format quickly and easily, directly in your browser with no software installation required.

Why should I convert WEBM to MKV?

MKV is a flexible and high-quality video format that supports multiple audio tracks, subtitles, and advanced features, making it ideal for editing, storing, or high-resolution playback.

Do I need to upload my video to use this converter?

No. All video conversions are done locally in your browser. Your WEBM file never leaves your device, ensuring complete privacy and security.

Is this converter free to use?

Yes, it’s 100% free. There are no hidden costs, no subscriptions, and no limits on how many files you can convert.

How long does it take to convert a WEBM file to MKV?

Conversion time depends on the size of your file and your device’s performance, but most files are converted in just a few seconds to a couple of minutes.

Сonvertiz

Convert your WEBM and MOV files into popular video formats such as MP4, AVI, and MKV without installing any third-party software or plugins.