Real PS4 downgrading is not done with a software tool found on the internet. It is a hardware modification process.
In the real homebrew scene, a "downgrade" is achieved through hardware modifications. Tools labeled V1.00 in this context are often PC software used in conjunction with specialized hardware (programmers and clip-on chips) to rewrite the console's internal flash memory. Ps4 Tool Downgrade V1.00 Download
: Click the Write button. The tool will usually display a progress bar. Real PS4 downgrading is not done with a
The PS4 hacking community continues to research potential vulnerabilities. The psdevwiki documents ongoing work that may eventually lead to software-based downgrade methods, but currently these remain theoretical: Tools labeled V1
If your PS4 is on a high firmware version (above 9.00), a simple software download will not downgrade it. The "PS4 Tool Downgrade V1.00" links you find are often misleading.
The reality is simple:
RewindPS4 is available for multiple platforms: