Merge and convert your files into a single, clean PDF
β free, private, and right in your browser.
The PDF shows black or blank pages in Firefox
This is a Firefox display setting, not a problem with your file β the same PDF opens fine in Chrome, Edge, or Adobe Reader. To fix Firefox:
about:config in Firefox's address bar and press Enter (accept the warning).gfx.canvas.accelerated and double-click it to set it to false.gfx.webrender.software to true.Prefer the menu? Settings β General β Performance β untick βUse recommended performance settings,β then untick βUse hardware acceleration when available.β
A file won't combine
Password-protected PDFs can refuse to merge. Remove the password (open it and re-save to a new PDF), then try again. If one specific file fails, try the other mode (Private vs. Best compatibility) above.