Images To PDF

import {PdfGenerator} from "@ironsoftware/ironpdf";
import fs from 'fs';

(async () => {
    // Specify the directory path
    const directoryPath = './images';

    // Read the contents of the directory
    fs.readdir(directoryPath, (err, files) => {
    if (err) {
        console.error('Error reading directory:', err);
        return;
    }

    // Filter file names to include only .jpg and .jpeg extensions
    const jpegFiles = files.filter((file) =>
        file.toLowerCase().endsWith('.jpg') || file.toLowerCase().endsWith('.jpeg')
    );

    // Construct full file paths for the filtered files
    const filePaths = jpegFiles.map((file) => `${directoryPath}/${file}`);

    // Converts the images to a PDF and save it.
    const pdf = PdfGenerator.imageToPdf(filePaths).then(
        (returnedPdf)=> {
            returnedPdf.saveAs("composite.pdf");
        });
    
    // Also see PdfDocument.rasterizeToImageFiles() method to flatten a PDF to images or thumbnails
    });
})();

Images To PDF

To convert a single image to a PDF document, simply input the file path into the PdfGenerator.imageToPdf method and export the resulting PDF document.

Converting multiple images to a PDF involves using an array of file paths. Below is the complete guide with a properly formatted code snippet.

const fs = require('fs');
const path = require('path');
const PdfGenerator = require('iron-pdf');

// Directory containing image files
const imageDirectoryPath = './images';

// Use fs.readdir to read all files from the image directory
fs.readdir(imageDirectoryPath, (err, files) => {
    if (err) throw err;

    // Filter the image files to include only .jpg and .jpeg extensions
    const jpegFiles = files.filter(file => {
        return path.extname(file).toLowerCase() === '.jpg' || path.extname(file).toLowerCase() === '.jpeg';
    });

    // Map the filtered file names to their full paths
    const filePaths = jpegFiles.map(file => path.join(imageDirectoryPath, file));

    // Convert the images to a PDF using PdfGenerator's imageToPdf method
    PdfGenerator.imageToPdf({ input: filePaths })
        .then(result => {
            // Save the resulting PDF document
            return result.saveAs('composite.pdf');
        })
        .then(() => {
            console.log('PDF successfully created and saved as "composite.pdf".');
        })
        .catch(error => {
            console.error('Error during PDF generation: ', error);
        });
});

Code Explanation

Import Required Modules:
- fs: A core Node.js module for interacting with the file system.
- path: A core module for handling and transforming file paths.
- PdfGenerator: A module from the IronPDF library used for generating PDFs.
Read Directory:
- fs.readdir: Reads the directory specified by imageDirectoryPath.
- Filters and returns files that have .jpg or .jpeg extensions.
Build Full File Paths:
- Uses path.join to construct the full paths of filtered image files.
Convert Images to PDF:
- The PdfGenerator.imageToPdf method takes the array of image paths and converts them to a single PDF.
Save the PDF:
- The saveAs method saves the generated PDF as composite.pdf.