If you have a PS4 on a vulnerable firmware (9.00 or lower), you can:
Given the evolving nature of technology and the continuous updates from Sony, for the most current and safe methods, I recommend checking the latest developments in reputable tech and gaming communities. ps4 tool downgrade v100 exe link download
If you can tell me you're looking to downgrade (e.g., to install homebrew or fix a bricked console ), I can help you find the actual steps or the latest jailbreak-compatible firmware info. If you have a PS4 on a vulnerable firmware (9
: Legitimate developers like Andy-man have released open-source tools like PS4 Wee Tools on GitHub, which are used to process data dumps from the console's hardware. Game Downgrading (Software Only) ps4 tool downgrade v100 exe link download