The official successor to the free version. It runs directly in your browser. SketchUp Make 2017 Access

If you just want to model in 3D without viruses, consider (web-based). It runs in your browser, saves to the cloud, and is 100% legal and safe. It lacks some Pro features, but for 90% of hobbyist work, it is perfect.

SketchUp Make 2017 (the free-for-personal-use desktop version) was permanently removed from official servers to align with newer subscription-based models. Legitimate Alternatives: Users are encouraged to use SketchUp Free

No. Not legally.