PDF editor? I have always regarded pdf as a terminal file format, the place data goes to die. Only half joking but pdf was always the final form from some other program, the internal editable data was never pdf. I have never seen a program works on the pdf directly, Probably because I have never had that much exposure to adobe software. the few times I have needed to do so I had to use a pdf programing library.

If you mean desktop publishing software that outputs a high quality pdf scribus works fairly well.

https://www.scribus.net

thank you for the link, never came across scribus before!

When I deal with government documents, visas, etc. I frequently need to produce 200-page PDFs that contains bank statements, utility bills, or other documents that arrived as PDF or were scanned into PDF. Some of those were scanned upside down, and then you might need to compress or split the resulting doc because of file size limit. So I need serious PDF editing software to deal with this - converting from PDF and back ruins all the official documents and leads to problems.

If you don't need to edit the actual text or content of the document there's a lot of tools like pdftk and ghostscript that can flip, resize, compress and split PDFs.

If you're on a Mac then the built-in Preview app works pretty well for this type of thing. The only problem I've had with it are accessing signed PDFs from AWS SOC2 attestations.

anf other online tool to help you https://anyconverters.com/pdf-converters.html