What are some alternatives?
When comparing Appnimi PDF Unlocker and Birdie PDF Security 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.
Aryson PDF Unlocker - PDF Unlocker Software is a smart utility used to remove the locks from the locked PDF files without corrupting the data of PDF files. It is advanced software used to remove the multiple restrictions from the PDF file with ease.
PDF Password Remover Tool - PDF Password Remover Tool. Free PDF password remover tool by PDF Technologies. Remove passwords from PDF documents.
PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
Recover PDF Password - Recover PDF Password for Mac recovers forgotten passwords to PDF and unlocks PDF documents.
iSafePDF - iSafePDF is a free open source PDF protection software.