Password Protect PDF Documents

In the domain of digital communication and data sharing, ensuring the confidentiality of sensitive information is paramount. Whether you handle financial records, legal agreements, or personal data, guaranteeing the privacy of your PDF files is non-negotiable. Thankfully, there’s an efficient solution for developers seeking to fortify their Node.js applications with an added layer of security: passcode protecting PDF files. In this blog post, we’ll commence on a journey to explore how you can seamlessly initiate REST API functionalities into your Node.js projects, granting you the ability to shield your valuable data within passcode-protected PDFs. Let’s learn how to password protect PDF documents and venture into this empowering path of secure document management, combining the capabilities of Node.js and PDF password protector REST API to bolster your data protection strategies.

Step 1: Installing Node.js PDF Password Protector SDK

To proceed, we must equip our Node.js environment with the necessary tools. Use the following command to install the Node.js SDK of GroupDocs.Merger Cloud seamlessly:

npm install groupdocs-merger-cloud

Step 2: Initiate the API Client

To get started with the API client, make sure to first acquire your Client ID and Client Secret from the dashboard. After obtaining them, add the following code as shown below to set up the client:

Step 3: Uploading the PDF Document

Before starting, it’s essential to upload the PDF file you wish to secure with a password. Employ any of the methods listed below to upload the document to your cloud storage:

  • Using the dashboard
  • Upload all files one by one using Upload File API from the browser
  • Upload programmatically using the code example given below:

As a result, the uploaded files will be available in the [files section][] of your dashboard on the cloud.

Step 4: Protect PDF Document using Node.js SDK

The following steps and sample code shows how to password-protect PDF file using Node.js SDK.

  1. Set up API credentials (AppSID and AppKey).
  2. Create a SecurityApi instance with the provided credentials.
  3. Define options for adding a password to a PDF document.
  4. Set the file path and password for the target document.
  5. Specify the output path for the protected document.
  6. Call the addPassword method with the options to add the password and save the result.

The following code example shows how to add a password to PDF file using Node.js SDK.

Step 5: Download Password Protected PDF File

The code given in the previous step saves the PDF file on the cloud. To download it, you can use the following code snippet.


Throughout this comprehensive guide, we’ve showcased the easy integration of GroupDocs.Merger Cloud REST API and the Node.js SDK to add password protection to PDF documents. By following these straightforward steps, you can fortify the security of your confidential data, ensuring you have full control over file access and protecting your sensitive information from unauthorized users.

Moreover, explore our API reference section that allows you to see and interact with our APIs directly through the browser. Node.js SDK’s complete source code is freely available on Github.

Finally, we keep writing new blog articles on different file formats and parsing them using REST API. So, please get in touch for the latest updates.

Free Online Password Protector

To password protect PDF document online for free. You can try our online PDF password protector app. This PDF password creator app is developed using the above-mentioned PDF password protector REST API.

Ask a question

In case you would have any queries or confusion about the PDF password protector REST API and Node.js SDK, please feel free to contact us via our forum.

See Also

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