How do I load an existing pdf implementation and replace strings in the document without changing the original layout

[2622594863]

How do I load an existing pdf implementation and replace strings in the document without changing the original layout

[hoehermann]

You may be looking for something like https://github.com/JoshData/pdf-redactor.

[sl2c]

Preserving layout, a.k.a. reflow, is a non-trivial operation. Take a look at pdfrwx whose classes provide full support for stream decompression (all PDF stream filters are supported) and parsing, which transforms a PDF stream into an abstract syntax tree (AST; see examples). After that you can focus on what exactly you want to do with the text by working directly with the AST. Once the AST has been edited, you can re-encoded it as stream and save the file.