Add Page Numbers & Paginate PDF (100% Offline)

Paginate PDF Documents Instantly

Whether you are preparing a legal brief, organizing a scanned book, or formatting a thesis, adding sequential page numbers is critical for document readability. Our tool allows you to select the exact starting number and position, making it perfect for appending files to an existing indexed document.

Fastest Sequential Page Numbering PDF Tool

Because our tool executes directly in your browser's local memory rather than relying on cloud queues, it can add footer numbers to massive PDF files in milliseconds. Simply select your position (like Bottom Center), and the tool will stamp a pristine, vector-based number on every page instantly.

Top Use Cases for Paginating PDFs

Developer Utility: Insert Page Numbers in PDF via Code

If you are a developer looking to automatically add page numbers to PDFs in your Node.js backend, you can use the open-source pdf-lib package. Here is the exact logic our tool uses to calculate coordinates and paginate:

import { PDFDocument, StandardFonts, rgb } from 'pdf-lib';
import fs from 'fs';

async function addPageNumbers(inputPath, outputPath, startNumber = 1) {
    // 1. Load document
    const existingPdfBytes = fs.readFileSync(inputPath);
    const pdfDoc = await PDFDocument.load(existingPdfBytes);
    
    // 2. Embed font
    const font = await pdfDoc.embedFont(StandardFonts.Helvetica);
    const pages = pdfDoc.getPages();
    
    // 3. Stamp every page
    pages.forEach((page, index) => {
        const { width, height } = page.getSize();
        const pageText = (startNumber + index).toString();
        const fontSize = 12;
        const textWidth = font.widthOfTextAtSize(pageText, fontSize);
        
        // Calculate Bottom-Center position
        const x = width / 2 - textWidth / 2;
        const y = 30; // 30 points from the bottom edge

        page.drawText(pageText, {
            x: x,
            y: y,
            size: fontSize,
            font: font,
            color: rgb(0, 0, 0),
        });
    });

    // 4. Save
    const pdfBytes = await pdfDoc.save();
    fs.writeFileSync(outputPath, pdfBytes);
}

addPageNumbers('report.pdf', 'report_numbered.pdf', 1);

Frequently Asked Questions