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PDF page counter

Reads a PDF and shows the detected page count.

Processing happens in your browser; we do not upload your file.

ActivePDFFree

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Counting pages is straightforward with pdf-lib: load the document in memory and read getPageCount(). Runs in the browser; install pdf-lib.

Count pages in a PDF

Loads a PDF in memory and returns the page count.

typescript

import { PDFDocument } from "pdf-lib";

export async function countPdfPages(file: File): Promise<number> {
  const bytes = await file.arrayBuffer();
  const pdf = await PDFDocument.load(bytes, { ignoreEncryption: true });
  return pdf.getPageCount();
}

Dependenciespdf-lib

Usage notes

Takes a browser File (e.g. from a file input).
It's async: use it with await or .then().

Limitations

An encrypted or damaged PDF may not be readable.
It only counts pages; it doesn't extract text or generate thumbnails.

About this tool

PDF page counter shows how many pages a document has, along with its name and size.

How to use

Upload the PDF.
You'll see the name, size, and detected page count.

Use cases

Verify the page count before printing.
Check a document you received.
Confirm a PDF fits within a sending size limit.

Limits

Max PDF size: 50 MB.

Privacy

Processing happens in your browser — we don't upload your files.

Common errors

The file isn't a valid PDF.
An encrypted or damaged PDF may not be readable.

Technical notes

Uses pdf-lib to read the document's page count.

Related tools

Split PDF Remove PDF pages Add page numbers to PDF

Technical details

ID: pdf-page-counter
Slug: /en/tools/pdf-page-counter
Backend: Not required
AI: Not required
API: Planned