Node.js PDFKit Library Example to Encrypt PDF Documents With Password in Javascript on Command Line

Welcome folks today in this blog post we will be using the pdfkit library to encrypt pdf documents with password in javascript. All the full source code of the application is shown below.

Get Started

In order to get started you need to install the below libraries using the below command as shown below

npm init -y

npm i pdfkit

After that you need to make an app.py file and copy paste the following code

app.py

const PDFDocument = require("pdfkit");
const fs = require("fs");
 
var options = {
    userPassword: "123456",
}
 
// Create a document
const doc = new PDFDocument(options);
 
// Pipe its output somewhere, like to a file or HTTP response
// See below for browser usage
doc.pipe(fs.createWriteStream("output.pdf"));
 
doc.addPage()
// Finalize PDF file
doc.end();

const PDFDocument = require("pdfkit");

const fs = require("fs");

var options = {

userPassword: "123456",

}

// Create a document

const doc = new PDFDocument(options);

// Pipe its output somewhere, like to a file or HTTP response

// See below for browser usage

doc.pipe(fs.createWriteStream("output.pdf"));

doc.addPage()

// Finalize PDF file

doc.end();

Ass you can see we are importing the pdfkit library at the top and then we are making the pdf document and adding two empty pages and after that we are declaring the password and then encrypting the pdf document with that password using the PDFDocument() constructor. And then we are saving the pdf document using the fs module.

node index.js