Frequently Asked Question:
How to change text in pdf without creating new PDF?
I want to extract word from pdf and change some other text instead of that in same pdf(without creating new pdf) and save it. How it possible?
Generally it is not possible to Load an existing PDF, edit/remove some text and save it again. Quick PDF Library and nearly every other PDF library around allow you to open and existing PDF, add extra text and comments, play with form fields, annotations and bookmarkes and save the file again.
The PDF format is a very complex format and many things can go wrong when you just edit an object and change a text string here and there. It is possible to do a few quick character changes in a file sometimes but only under certain conditions.
A PDF is like a mini programming languages. You cannot change or delete a few lines of code and expect it to work similar to what id did before unless you know what you are doing and where you can make changes safely.