pdf-zusammenfuegen

Minimal utility to merge PDF files offline, fully in the browser or in Node.js, without uploading documents.

Installation

npm install pdf-zusammenfuegen
# or
pnpm add pdf-zusammenfuegen

API

mergePdfs(inputs: MergePdfSource[]): Promise<Uint8Array>

• inputs: Array of objects with data (any ArrayBuffer, typed view, Blob, or { arrayBuffer(): Promise<ArrayBuffer> }) and optional pageRange ("1-4,7,10-12").
• Returns a Uint8Array containing the merged PDF bytes.
• Works entirely in memory; no uploads are performed.

import { mergePdfs, createBlob } from "pdf-zusammenfuegen";

const files = [
  { data: firstFile, pageRange: "1-3" },
  { data: secondFile }
];

const bytes = await mergePdfs(files);
const blob = createBlob(bytes);

createBlob(bytes: Uint8Array): Blob

Creates a download-ready Blob for the merged PDF when running in a browser.

Features

• Privacy-first: runs client-side with pdf-lib, so sensitive files never leave the device.
• Supports page-range selection and re-ordering through the order of the input array.
• Compatible with browsers and Node.js (when supplied with ArrayBuffer or typed arrays).

Build

npm run build

Outputs compiled ESM to dist/ with type declarations.

Security & Privacy Notes

All processing happens locally or in your own Node.js process; no telemetry, uploads, or tracking are involved. This matches the GDPR-compliant, offline-first goals of the broader pdfzusammenfügen toolset.