PDF Only Shows First Page — Missing Pages Fix
A PDF that only shows one page when it should have many is either corrupted, password-protected, or opened by an app that only renders the first page. Here's how to see all pages.
Opening a 20-page PDF and seeing only one page is startling — but the remaining pages are almost certainly present in the file. This problem is caused by one of four things: the viewer is an image viewer rather than a proper PDF reader, the file is actually page 1 of a split document, the PDF was exported incorrectly and only has one page in its page tree, or a partial download cut off the file before all pages were written.
Check 1: Are You Using a PDF Reader or an Image Viewer?
On Windows, double-clicking a PDF can open it in Photos or another image viewer rather than a PDF reader — and image viewers only show the first page (or treat each page as a separate image frame). The fix: right-click the file → Open With → choose Adobe Acrobat Reader or your browser. If Chrome or Acrobat shows all pages, the issue was the default application. Fix the default: right-click → Properties → Change → select Acrobat Reader as the default for .pdf files.
Check 2: Was the File Split or Exported Incorrectly?
Some workflows export only the current page or a selected page range to PDF. If the file is named "document_page1.pdf" or if its file size is very small for what should be a multi-page document (under 100 KB for a supposedly 20-page PDF), it may genuinely contain only one page. Check the page count in the file properties (File → Properties in Acrobat, or look at the page counter in the viewer toolbar). If the count matches what is showing (1 of 1), the problem is in the export step — re-export with the full page range selected.
Check 3: Partially Downloaded File
PDF page data is distributed through the file. If a download was interrupted, the file may have page 1 data (near the start) but missing page 2-20 data (which comes later in the file stream). The cross-reference table and file trailer also reside at the end — if the download cut off before them, the PDF reader can only access whatever pages appear before the cut-off point. Fix: delete the partial download and re-download on a stable connection. Check the file size against what the source reports — a 5 MB PDF that downloaded as 200 KB is clearly partial.
Check 4: Corrupted Page Tree
The PDF page tree (the internal hierarchy that organizes pages) can be corrupted so that only one branch of pages is accessible to the reader. Symptoms: the viewer shows 1 of 1 pages despite a large file size, or navigation jumps from page 1 directly to an error. Fix: run the file through Ghostscript to rebuild the page tree: gs -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=fixed.pdf input.pdf. Ghostscript reads each page object directly from the file and writes a new, clean page tree — recovering pages even when the index is corrupted.
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