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Search & replace PDF text or images in JavaScript

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Sample JavaScript code to use PDFTron SDK for searching and replacing text strings and images inside existing PDF files (e.g. business cards and other PDF templates). Unlike PDF forms, the ContentReplacer works on actual PDF content and is not limited to static rectangular annotation regions. Learn more about our JavaScript PDF Library and PDF Editing & Manipulation Library.

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//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------


const { PDFNet } = require('@pdftron/pdfnet-node');
const PDFTronLicense = require('../LicenseKey/LicenseKey');

((exports) => {

  exports.runContentReplacer = () => {

    const main = async() => {
      const inputPath = '../TestFiles/';
      const outputPath = inputPath + 'Output/';

      try {
        const inputFilename = 'BusinessCardTemplate.pdf';
        const outputFilename = 'BusinessCard.pdf';

        const doc = await PDFNet.PDFDoc.createFromFilePath(inputPath + inputFilename);
        doc.initSecurityHandler();

        const replacer = await PDFNet.ContentReplacer.create();
        const page = await doc.getPage(1);
        const img = await PDFNet.Image.createFromFile(doc, inputPath + 'peppers.jpg');

        const region = await page.getMediaBox();
        const replace = await img.getSDFObj();
        await replacer.addImage(region, replace);
        await replacer.addString('NAME', 'John Smith');
        await replacer.addString('QUALIFICATIONS', 'Philosophy Doctor');
        await replacer.addString('JOB_TITLE', 'Software Developer');
        await replacer.addString('ADDRESS_LINE1', '#100 123 Software Rd');
        await replacer.addString('ADDRESS_LINE2', 'Vancouver, BC');
        await replacer.addString('PHONE_OFFICE', '604-730-8989');
        await replacer.addString('PHONE_MOBILE', '604-765-4321');
        await replacer.addString('EMAIL', 'info@pdftron.com');
        await replacer.addString('WEBSITE_URL', 'http://www.pdftron.com');
        await replacer.process(page);

        await doc.save(outputPath + outputFilename, PDFNet.SDFDoc.SaveOptions.e_remove_unused);

        console.log('Done. Result saved in ' + outputFilename);
      } catch (err) {
        console.log(err);
      }
      try {
        const inputFilename = 'newsletter.pdf';
        const outputFilename = 'ContentReplaced.pdf';

        const doc = await PDFNet.PDFDoc.createFromFilePath(inputPath + inputFilename);
        doc.initSecurityHandler();

        const replacer = await PDFNet.ContentReplacer.create();
        const page = await doc.getPage(1);
        const region = await page.getMediaBox();
        await replacer.addText(region, 'hello hello hello hello hello hello hello hello hello hello');
        await replacer.process(page);

        await doc.save(outputPath + outputFilename, PDFNet.SDFDoc.SaveOptions.e_remove_unused);

        console.log('Done. Result saved in ' + outputFilename);
      } catch (err) {
        console.log(err);
      }
      console.log('Done.');
    };
    PDFNet.runWithCleanup(main, PDFTronLicense.Key).catch(function(error){console.log('Error: ' + JSON.stringify(error));}).then(function(){return PDFNet.shutdown();});
  };
  exports.runContentReplacer();
})(exports);
// eslint-disable-next-line spaced-comment
//# sourceURL=ContentReplacerTest.js