[How to unlock a PDF?]

The PDF password cracking tool I often use now is recommended by Google. Like this tutorial：

https://www.passgeeker.com/crack-pdf-password.html

It involves 4 methods to crack passwords.

Or try John the Ripper to Crack PDF Password.

https://www.techspot.com/downloads/6970-john-the-ripper.html

It should be noted that when using John the Ripper, there are many points to be careful. It is a software involving more text content, which is not a good choice for novices.

[How to unlock a PDF?]

VeryPDF PDF Password Remover failed to bring me luck, which is unfortunate.