ONLYOFFICE DocSpace v2.6.3, the newest version of the ONLYOFFICE collaborative platform, brings an important feature that allows users to collaborate on PDF files online. When co-editing PDFs, you can work in the Strict mode, and your edits will be only visible after you click the Save button. For real-time co-authoring, you can activate the Fast mode making your edits visible as soon as you make them. In addition to the modes, DocSpace users can leave comments, tag each other and communicate in real time when working collaboratively on the same PDF file.
Besides collaborative PDF editing. ONLYOFFICE DocSpace 2.6.3 comes with plenty of bug fixes. You can try the newest DocSpace version and co-edit PDFs in the cloud or deploy the platform on your local server.