If you are looking for a free download because you cannot justify the high cost of Adobe Creative Cloud, there are modern, legal, and safe alternatives that outperform an aging CS6.
Softonic is one of the oldest and largest software download portals on the internet. While it has improved its reputation over the years, downloading legacy Adobe products from it carries significant risks. Adobe officially discontinued Photoshop CS6 in 2017
Softonic often wraps downloads in its own proprietary installer. While this helps them monetize free downloads, it has historically been a vector for "bundling"—installing unwanted browser toolbars, adware, or changing your homepage settings alongside the desired program.