What are some alternatives?
When comparing Birdie PDF Security Remover and 4dots Free PDF Password Remover, you can also consider the following products
SysTools PDF Unlocker - PDF Unlocker software allows users to remove restrictions from PDF documents. Unlock PDF for copy, print, edit, sign, comment, etc., On any Windows & Mac OS. Also, remove known user-level password & owner level password security from PDF files.
PDF Password Remover Tool - PDF Password Remover Tool. Free PDF password remover tool by PDF Technologies. Remove passwords from PDF documents.
A-PDF Restrictions Remover - For 9.99 $ A-PDF Restrictions Remover is extremely easy to use.
Recover PDF Password - Recover PDF Password for Mac recovers forgotten passwords to PDF and unlocks PDF documents.
Free Any Data Recovery - 100% Completely Free Data Recovery Software
Free Image to PDF Converter - Convert JPG, BMP, PNG Images to PDF File