Downgrading a PlayStation 4 's system firmware is not supported by Sony through any official or legal means
…you might trick the console into allowing a lower firmware installation. However, this is extremely risky. You need advanced soldering skills (micro-soldering), specialized programmers (like a Teensy 2.0++ or a Raspberry Pi Pico), and a deep understanding of hex editing.
However, if your PS4 is truly bricked (black screen, blinking blue light, no display), a "downgrade tool" won’t help either. That requires a hardware flasher to rewrite the NOR chip (if the brick is firmware-related). For most bricks, the solution is a new hard drive or a reinstall of the same firmware via Safe Mode.
Benefits of the PS4 Downgrade Tool
Disclaimer: This article is for educational purposes. Downgrading a console violates Sony's Terms of Service, voids your warranty, and may result in a permanent hardware ban from PSN. Proceed at your own risk.
Part 2: What People Actually Mean by "PS4 Downgrade Tool"
When users search for a "PS4 downgrade tool," they are usually looking for one of three things. It is vital to distinguish between them.
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