Playstation 4 Flash tool will let you generate firmware binaries for the PS4. The program requires encryption keys that you could theoretically acquire by following Fail0verflow’s recent explanation of their PS4 southbridge hack. Let’s just say this release is not for everyone in its current state, but could prove useful for hackers today, and for end users in the future.
Golden credits Team Molecule, Zecoxao, skfu, iqd, as well as “anonymous contributors” for help on this tool.
Download PS4 Flash Tool

You can download PS4 Flash Tool from the developer’s github here.