Fix "PDF Cannot Be Displayed" Error in Internet Explorer and Legacy Browsers
"PDF cannot be displayed" in older browsers or Adobe's browser plugin means the in-browser PDF plugin failed. Here's how to switch to a working viewer.
"PDF cannot be displayed" most commonly appears when an old browser is trying to use the Adobe Acrobat browser plugin to display a PDF inline, and that plugin has crashed, expired, or been blocked. Modern browsers (Chrome, Firefox, Edge) don't use the Adobe plugin — they have their own built-in PDF viewers. This error is predominantly a legacy browser or IT-managed browser problem.
Why This Error Still Appears in 2024
Adobe discontinued the Acrobat browser plugin for all modern browsers in 2020. Before that, it was the standard way PDFs loaded inside browsers — clicking a PDF link would open it inline via the plugin. Corporate environments that still run Internet Explorer 11, old versions of Firefox (pre-2020), or locked Chrome installations (where the built-in viewer is disabled by IT policy) still encounter this error because the plugin is gone but the browser still tries to invoke it.
Fix 1 — Download and Open the PDF Directly
The immediate fix: instead of clicking the PDF link to open it in the browser, right-click → "Save target as" or "Save link as" to download the file. Then open it with Adobe Reader or any PDF application on your computer. This completely bypasses the browser plugin mechanism. If the browser doesn't show a right-click option for PDF links, press Ctrl+S when the error page is showing — this may save the underlying PDF rather than the error page.
Fix 2 — Switch to a Modern Browser
Chrome, Firefox, and Edge all have built-in PDF viewers that work without any plugin. If you're still using Internet Explorer: open the PDF URL in Chrome or Edge (install if not present). Both browsers are free and open PDFs natively without any plugin. If your organisation mandates IE for intranet use, you can open the PDF URL directly in Chrome even if the intranet site itself must be used in IE.
Fix 3 — Disable Adobe PDF Plugin in Firefox
If using Firefox and Adobe's plugin is partially installed and conflicting: go to about:addons → Plugins → find "Adobe Acrobat" or "Adobe PDF Plug-In" → change from "Ask to Activate" or "Always Activate" to "Never Activate." Firefox's built-in PDF.js viewer will then handle PDFs instead of the Adobe plugin. Firefox's built-in viewer is reliable and handles all standard PDFs without the plugin conflicts.
Fix 4 — For IT-Managed Browsers
If you're in a corporate environment where the browser PDF viewer has been disabled by Group Policy and you can't install or change browsers, your options are: (1) Ask IT to re-enable the built-in PDF viewer or allow PDF download. (2) Use Windows' built-in Edge browser (usually not locked by the same policies as your primary work browser). (3) Right-click PDF links to download rather than trying to view inline. For the PDFs themselves, running through FixMyPDF's compressor can resolve compatibility issues if the underlying PDF is the problem.
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