combine-pdfs Combine multiple PDFs into one. Install npm install combine-pdfs Usage const { promises: fs } = require("fs");const combinePdfs = require("combine-pdfs"); await fs.writeFile("output.pdf", await combinePdfs([ await fs.readFile("file.pdf"), await fs.readFile("file2.pdf")])); API combinePdfs(pdfs) pdfs Type: Array<string | Uint8Array | ArrayBuffer | Buffer> The PDFs to combine.