Clarity Vx is not a permanently free plugin, you can download a
If you absolutely cannot pay anything, here are free noise reduction tools that work surprisingly well:
It analyzes the audio in real-time, distinguishing between voice frequencies and background noise. It then suppresses the noise without touching the vocal integrity. The result is clean, studio-quality dialogue even from recordings made on a smartphone in a noisy café.
Cracked plugins are one of the top vectors for malware, ransomware, and keyloggers. Hackers embed malicious code into the installer. Once you run it, they can steal your DAW projects, passwords, or even lock your computer.
Waves puts plugins on sale for multiple times per year. Clarity Vx (non-Pro) has been as low as $29 during Black Friday or holiday sales. Sign up for their newsletter or check plugin deal sites like PluginBoutique.