Note: If the plugin is a .rb folder (legacy), copy it to C:\Users\[YourName]\AppData\Roaming\SketchUp\SketchUp 2021\SketchUp\Plugins.

To install your newly downloaded SketchUp 2021 plugins pack:

Before diving into plugins, let’s address the elephant in the room: Why use SketchUp 2021 when 2024 or 2025 versions exist?

Thus, finding a fresh, updated plugin pack for 2021 is still a top search query.

The pack includes a curated selection of free plugins for:

⚠️ Note: Only free plugins or open-source tools are included. No cracked or paid plugins are distributed.

Do not use "plugins pack .com" sites. Use these verified repos:

Even with an updated pack, you may encounter issues:

| Error Message | Solution | | :--- | :--- | | "This extension is not compatible with this version of SketchUp" | Edit the .rb file with Notepad and change the requirement line to >=2021. | | "Missing library: LibFredo6" | Download LibFredo6 separately from Sketchucation. | | "Boot fails / SU crashes on startup" | Uninstall all plugins, then reinstall one by one to find the conflict. | | "Toolbar not showing" | Go to View > Toolbars and enable it manually. |

This pack is updated quarterly (last update: April 2026). Future updates will include new plugin versions and compatibility patches.

I understand you're looking for a free plugin pack for SketchUp 2021. However, I need to provide some important guidance: