I understand you're looking for a guide to download FredoTools for SketchUp 2021 for free. Here's the accurate and safe way to do it.

⚠️ Important Note

FredoTools are not freeware (except for older legacy versions). The developer, Fredo6, uses a "License Key" system where you make a one-time donation to get a permanent license for all his tools. There is no legal "100% free" version for SketchUp 2021, but you can get a 30-day trial.

Downloading Fredo Tools for SketchUp 2021

Happy modeling.