File Convert

Convert WEBM to MKV

Free online WEBM-to-MKV converter — upload a WEBM file and download a MKV. Fast, private, no signup.

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WEBM vs MKV

WEBM

Open web video container (VP8/VP9/AV1).

About WEBM ↗

MKV

Matroska open multimedia container.

About MKV ↗

WEBM to MKV: frequently asked questions

How do I convert WEBM to MKV?

Drop your WEBM file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a MKV to download. No software to install.

Is the WEBM to MKV converter free?

Yes. Convert WEBM to MKV for free right in your browser, with no account needed to get started.

Is it safe and private?

Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.

What's the difference between WEBM and MKV?

Open web video container (VP8/VP9/AV1). Matroska open multimedia container.

Related conversions

Convert WEBM to: MP4 · MOV · 3GP · AVI · FLV · MPEG · WMV · JPG · PNG · MP3

Convert to MKV from: 3GP · AVI · FLV · MOV · MP4 · MPEG · WMV

Browse all supported formats →