.mk3d file: how to open it on Windows

9 Windows apps register the .mk3d extension. Install one of them to open the file with a double-click.

About the format

Format data: freedesktop.org shared-mime-info and PRONOM (The National Archives, UK).

MPC-HC
MPC-HC is an extremely light-weight, open source media player for Windows. It supports all common video and audio file formats available for playback.

Open source 2.8.4 193.6K ↓ ★ 16K
MPC-BE
Media Player Classic - BE is a free and open source audio and video player for Windows.

Open source 1.9.2 136.3K ↓ ★ 4.6K
K-Lite Codec Pack Full
A collection of DirectShow filters, VFW/ACM codecs, and tools.

Free 20.1.0 5M ↓
K-Lite Mega Codec Pack
A collection of DirectShow filters, VFW/ACM codecs, and tools.

Free 20.1.0 663.3K ↓
K-Lite Codec Pack Basic
A collection of DirectShow filters, VFW/ACM codecs, and tools.

Free 20.1.0 527.9K ↓
K-Lite Codec Pack Standard
A collection of DirectShow filters, VFW/ACM codecs, and tools.

Free 20.1.0 230.8K ↓
Icaros
A collection of lightweight, high quality, Windows Shell Extensions.

Free 3.3.6.000 ★ 1.9K
ImPlay
A Cross-Platform Desktop Media Player

Open source 1.5.1 ★ 789
Pure Codec
Codec pack for HD fans.

Free 20260630