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Change PDF Password using Node.js REST API

Node.js PDF password management is straightforward with Aspose PDF Cloud. This tutorial shows how to reset a PDF password via the Node.js REST API, using the Aspose PDF Cloud SDK for Node.js. You’ll need the current password and the new user and owner passwords.

Prerequisite

  • Set up a Node.js project and add the SDK as a dependency

Steps to Change Password of PDF using Node.js REST Interface

  1. Import the required classes from the SDK for password operations.
  2. Instantiate the PdfApi object with your client ID and client secret.
  3. Read the source PDF file into a memory stream and upload it to Aspose Cloud storage.
  4. Convert the old password, new user password, and new owner password to Base64 strings.
  5. Call PostChangePasswordDocumentInStorage to apply the new passwords, passing the file name, current password, new user password, and new owner password.
  6. Use the DownloadFile method to retrieve the updated PDF.
  7. Save the returned stream locally as a PDF file.

These steps illustrate how to change a PDF password online using the Node.js‑based API. Import the necessary classes, create a helper to encode strings to Base64, load and upload the source PDF, generate the required password strings, invoke PostChangePasswordDocumentInStorage, and finally store the resulting PDF on disk.

Code to Change Password of PDF File using Node.js RESTful Service

Use the code above to change the password on an Adobe PDF via the Node.js REST API. The input PDF must already be password‑protected, and you must know its existing password; otherwise the operation will fail.

For information on removing a password from an encrypted PDF, see the article Decrypt PDF using Node.js REST API.

Related format information: PDF file format details.

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