PDF Page Counter

PDF Page Counter is the simplest tool in the PDF category but one of the most frequently needed: you have a PDF file and need to know how many pages it contains before printing, before emailing, or before quoting a printing cost. Your file explorer may not show page counts for PDFs (Windows Explorer does not, macOS Finder does for some but not all PDFs), and opening a large PDF just to check the page count is slow. This tool reads only the document structure — specifically, the page tree in the PDF catalog — to determine the page count. It does not load, render, or process any page content. This means it is extremely fast: a 50 MB, 500-page PDF returns the page count in under a second because only a few kilobytes of structural data are read. The file is processed entirely in your browser memory; nothing is transmitted anywhere. The tool uses pdf-lib's getPageCount() method, which walks the PDF page tree without loading page content streams. This makes it efficient for very large documents. The result is displayed as a simple number along with the file name, so there is no ambiguity about which file you counted. Common use cases: printing services ask for a page count before quoting; email attachment limits may restrict PDFs over a certain number of pages; you receive a PDF from a client and need to estimate review time; you are archiving documents and need to log page counts. In each case, this tool gives you the answer instantly without opening the full PDF.