asgardius New pdf reader feature requires setting a pdf.js server. If you are using MinIO you can use it to host pdf.js. You need to go to pdf.js github repository and download latest release. Extract contents to a folder and edit web/viewer.js file finding line that starts with const HOSTED_VIEWER_ORIGINS You need to add your MinIO instance url and save changes. You need to create a new bucket and add an access rule to grant public access to pdf.js files. The following step is upload pdf.js files and test public access. If at attempting to access web/viewer.html file appears a sample file, then this was set up correctly. Now you need to add pdfjs folder url to app (this will work only for this MinIO instance)