Node-qpdf2 NPM

node-qpdf2

A very simple wrapper for qpdf which is performs content-preserving transformations on PDF files. It includes encrypting and decrypting PDF files with AES 256, AES 128, RC4 (128 & 40) encryption algorithms. This is a fork of nrhirani/node-qpdf, adding Promises and Types, and is kept mostly up to date with qpdf.

Dependencies

qpdf
- Version 11 is the minimum version for node-qpdf2 4.0+

Installation

Install qpdf:
- Download qpdf
Install node-qpdf:
```
npm install node-qpdf2
```

Serverless?

This package can be uses on serverless platforms by using your vendor's layers functionality. Use the zip release from qpdf as the layer. For example, qpdf-11.1.0-bin-linux-x86_64.zip can be directly uploaded as a layer, and has been tested using Amazon Lambda.

Encryption

You can encrypt your PDF by following:

import { encrypt } from "node-qpdf2";

const pdf = {
  input: "./test/example.pdf",
  output: "/tmp/encrypted.pdf",
  password: "1234",
}

await encrypt(pdf);

Options for Encryption

Please see src/encrypt.ts for the latest options, as well as QPDF's documentation for information on what each restriction does.

Examples

Render and Save:

import { encrypt } from "node-qpdf2";

const options = {
    input: "./test/example.pdf",
    keyLength: 128,
    output: "/tmp/encrypted.pdf",
    password: 'YOUR_PASSWORD_TO_ENCRYPT',
    restrictions: {
        print: 'low',
        useAes: 'y'
    }
}

await encrypt(options);

Decryption

You can decrypt your PDF by following:

import { decrypt } from "node-qpdf2";

const options = {
  input: "/tmp/encrypted.pdf",
  output: "/tmp/decrypted.pdf",
  password: "YOUR_PASSWORD_TO_DECRYPT_PDF",
}

await decrypt(options);

PDF Encryption info

You can retrieve encryption information using the info function. This function will return a Promise. See here for more information.

import { info } from "node-qpdf2";

const options = {
  input: "/tmp/encrypted.pdf",
  password: "FILE_PASSWORD",
}

console.log(await info(options));

If the file is not encrypted, the result will be "File is not encrypted".