Getting Started

@manojcoder/pdf-utils is a lightweight, framework-agnostic, browser-compatible, privacy-first PDF manipulation library powered by pdf-lib. It runs 100% locally in the browser, keeping all documents completely secure.

Installation

Install the package alongside pdf-lib (peer dependency):

npm install @manojcoder/pdf-utils pdf-lib

Basic Example

Here is how you can import and unlock a password-protected PDF in standard client-side JavaScript or TypeScript:

import { unlockPDF } from "@manojcoder/pdf-utils";

async function handleDecrypt(file: File) {
  try {
    const password = "my-secure-password";
    
    // Decrypt the file locally
    const decryptedBytes = await unlockPDF(file, password);
    
    // Convert output Uint8Array to a Blob for downloading or previewing
    const blob = new Blob([decryptedBytes], { type: "application/pdf" });
    const downloadUrl = URL.createObjectURL(blob);
    
    // Create an anchor and trigger download
    const link = document.createElement("a");
    link.href = downloadUrl;
    link.download = `unlocked_${file.name}`;
    link.click();
  } catch (error) {
    console.error("Decryption failed:", error);
  }
}

Input/Output Types

All utilities in this package consistently accept:

• File
• Blob
• ArrayBuffer
• Uint8Array

And they return a unified Uint8Array which is highly flexible and memory efficient.