184
ONLYOFFICE 7.5 now features a dedicated PDF editor.
(news.itsfoss.com)
All about open source! Feel free to ask questions, and share news, and interesting stuff!
Community icon from opensource.org, but we are not affiliated with them.
It either runs in the browser or an electron app, so unlikely that OnlyOffice will be a good fit.
You could try Collabora/Nextcloud Office, which runs the LibreOffice on the server and just streams UI tiles to the clients, so the impact of running that in shifted to the server. Still needs to run a browser though.