It is designed for operating PDF files and contains almost all the operations you can imagine, such as compressing, merging, splitting, extracting, inserting, extracting images, converting images, extracting text, extracting sequences, encrypting, etc. If you are worried about operating PDF files, download them. They are so fantastic.

Features of PDF Squeezer - PDF Toolbox
Merge
Split
Extract
Insert
You can extract text in PDF and save as txt or rtfd format
Compress
Sort
Encrypt
Technical Details and System Requirements
MacOS 10.12 or later