How to add text and images to PDF in JavaScript with PDF.co Web API

What is PDF.co Web API? It is the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.

On-demand (REST Web API) version:
 Web API (on-demand version)

On-premise offline SDK for Windows:
 60 Day Free Trial (on-premise)

app.js

      
var https = require("https"); var path = require("path"); var fs = require("fs"); // `request` module is required for file upload. // Use "npm install request" command to install. var request = require("request"); // The authentication key (API Key). // Get your own by registering at https://app.pdf.co/documentation/api const API_KEY = "********************************"; // Source PDF file. const SourceFile = "./sample.pdf"; // Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'. const Pages = ""; // PDF document password. Leave empty for unprotected documents. const Password = ""; // Destination PDF file name const DestinationFile = "./result.pdf"; // Text annotation params const Type = "annotation"; const X = 400; const Y = 600; const Text = "APPROVED"; const FontName = "Times New Roman"; const FontSize = 24; const Color = "FF0000"; // Input file Base64 const SourceFileBase64 = fs.readFileSync(SourceFile, { encoding: 'base64' }); // 1. Get Uploaded File Url from Base64 Source uploadBase64ToPDFco(SourceFileBase64, 'sample.pdf') .then((respBase64FileUrl) => { // 2. Add Text Annotation to PDF addTextAnnotationToPDF(respBase64FileUrl, DestinationFile); }) .catch(e => { console.log(e); });; function addTextAnnotationToPDF(sourceFileUrl, destinationFile) { // * Add Text * // Prepare request to `PDF Edit` API endpoint var queryPath = `/v1/pdf/edit/add`; // JSON payload for api request var jsonPayload = JSON.stringify({ name: path.basename(destinationFile), password: Password, pages: Pages, url: sourceFileUrl, type: Type, x: X, y: Y, text: Text, fontname: FontName, size: FontSize, color: Color }); var reqOptions = { host: "api.pdf.co", method: "POST", path: encodeURI(queryPath), headers: { "x-api-key": API_KEY, "Content-Type": "application/json", "Content-Length": Buffer.byteLength(jsonPayload, 'utf8') } }; // Send request var postRequest = https.request(reqOptions, (response) => { response.on("data", (d) => { // Parse JSON response var data = JSON.parse(d); if (data.error == false) { // Download the output file var file = fs.createWriteStream(destinationFile); https.get(data.url, (response2) => { response2.pipe(file).on("close", () => { console.log(`Generated PDF file saved to '${destinationFile}' file.`); }); }); } else { // Service reported error console.log(data.message); } }); }).on("error", (e) => { // Request error console.error(e); }); // Write request data postRequest.write(jsonPayload); postRequest.end(); } function uploadBase64ToPDFco(SourceFileBase64, inputFileName) { return new Promise(resolve => { var options = { 'method': 'POST', 'url': 'https://api.pdf.co/v1/file/upload/base64', 'headers': { 'x-api-key': API_KEY }, formData: { 'file': SourceFileBase64, 'name': inputFileName } }; request(options, function (err, res, body) { if (!err) { var data = JSON.parse(res.body) resolve(data.url); } else { console.log("uploadFile() request error: " + e); } }); }); }

package-lock.json

      
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package.json

      
{ "name": "test", "version": "1.0.0", "description": "PDF.co", "main": "app.js", "scripts": {}, "keywords": [ "pdf.co", "web", "api", "bytescout", "api" ], "author": "ByteScout & PDF.co", "license": "ISC", "dependencies": { "request": "^2.88.2" } }

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