Pdf Reader and Editor

PDF document reading and editing application.

PDF Expert

A powerful PDF editor that supports reading, annotating, editing, signing, and other functions, as well as merging, converting, and filling out forms.

Support Platform: macOS, iOS, iPadOS
Price: Paid

Links:

App Store
Purchase on Lizhi

Stirling PDF

Stirling-PDF is a one-stop PDF processing toolset that supports viewing, converting, editing, splitting, and merging PDF files.
There is an open-source version that can be deployed locally to provide a web-based PDF processing toolset service using Docker.

Support Platform: Website
Price: Free ｜ Paid Advanced Version ｜ Open-source version can be deployed by yourself

Links:

Website, open it directly
GitHub, source code repository

Some similar self-deployed online services, if the official version is slow to access, you can try these:

PDF.con.sh

PDF Filler

PDF Filler is also an online PDF editor that supports collaboration and signing.

Support Platform: Website
Price: Free | Paid Advanced Version

Links: Website