.blk file: how to open it on Windows

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

About the format

Format

AutoCAD Block Attribute Template

PRONOM identifier

x-fmt/24

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

• 
  XnView MP

  Professional Image Viewer & Photo Management

  Proprietary 1.12.2.0 436.9K ↓
• 
  SageThumbs

  A powerful shell extension allowing to preview enormous amount of image formats directly in Windows Explorer.

  Open source 2.0.0.23 14.6K ↓
• B
  Block Load

  Commercial load calculation at its finest.

  Proprietary 4.2

Related guide: Change the default app for a file type in Windows