modern-pdf-lib

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modern-pdf-lib / mergePdfs

Function: mergePdfs()

mergePdfs(documents): Promise<PdfDocument>

Defined in: src/core/documentMerge.ts:383

Merge multiple PDF documents into a single document.

Pages from each source document are appended in order. Resources are deduplicated: if two source documents contain the same font file (byte-identical), only one copy is kept in the merged output.

Parameters

documents

PdfDocument[]

Array of PdfDocument objects to merge.

Returns

Promise<PdfDocument>

A new PdfDocument containing all pages.

Example

import { PdfDocument, mergePdfs } from 'modern-pdf-lib';

const doc1 = await PdfDocument.load(bytes1);
const doc2 = await PdfDocument.load(bytes2);
const merged = await mergePdfs([doc1, doc2]);
const mergedBytes = await merged.save();