Working with pdf?

Good afternoon. I would like to find a good solution for working with pdf files. What tool can you advise me from all the diversity on the Internet?

Oh, I would also like to find a good solution to work with pdf files and other file formats, but so far I have only been able to find a paid solution.

You know, I have many times encountered the need to export iMessage messages to PDF and failed. But recently I managed to find a very useful site https://www.pdfplatform.com/blog/how-to-export-imessage-conversation-to-pdf-5-easy-steps/ where I got a step by step explanation of the export process and realized that this is a pretty simple solution. I recommend that you definitely read this blog, because you may suddenly need to export messages to PDF.