Merge PDF Utility

The mergePDFs function combines an array of PDF files, blobs, or buffers sequentially into a single consolidated PDF document.

API Signature

function mergePDFs(
  files: (File | Blob | ArrayBuffer | Uint8Array)[]
): Promise<Uint8Array>

Parameters

• files: An array of input PDF documents to concatenate.

Code Example

Here is how you can merge multiple files selected by a user in React, Vue, or vanilla Javascript:

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

async function combineFiles(filesList: File[]) {
  try {
    // Merge the array of files client-side
    const mergedBytes = await mergePDFs(filesList);
    
    // Convert output Uint8Array to a Blob
    const mergedBlob = new Blob([mergedBytes], { type: "application/pdf" });
    const downloadUrl = URL.createObjectURL(mergedBlob);
    
    // Trigger download
    const link = document.createElement("a");
    link.href = downloadUrl;
    link.download = "combined_document.pdf";
    link.click();
  } catch (error) {
    console.error("Merging failed:", error);
  }
}