is an excellent open-source alternative available on GitHub legitimately. It cleans temp files, caches, cookies, and logs – no license keys needed.
There are safe, legal ways to use CCleaner without resorting to GitHub keys.
In early 2024, security researchers at Trend Micro identified a GitHub repository titled "CCleaner-Pro-Key-2025" that had over 50 stars and multiple forks. The repository contained a Readme.md with a long list of fake keys and a link to download a "portable version." The download link pointed to a file hosted on a free file-sharing site.