While many sites offer "plugin packs" for SketchUp 2021, downloading pre-bundled files from unofficial sources can be risky for your computer's security. The most reliable and secure way to build your own "pack" is by downloading individual free extensions directly from authoritative libraries. Where to Download Free Plugins Safely
Window > Extension Manager.Install Extension..rbz file (single file).Q: Does the Free Pack work on SketchUp 2021 Make (Free version)? A: Yes. Extensions work identically in SketchUp Make (Free) and SketchUp Pro, except for export/import plugins that require Pro. Sketchup 2021 Plugins Pack Free Download