Live Demo

You can see the live demo of the below project here

Get Started

In order to get started you need to install the library

npm i easy-pdf-merge

npm i express

npm i multer

npm i nodemon

Source Code

<!DOCTYPE html>
<html>
  <head>
    <title>Merge Multiple PDF Files in Node and Express</title>
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
    />
  </head>
  <body>
      <div class="container">
          <h1 class="text-center">
              Merge PDF Files
          </h1>
          <form action="/mergepdffilesdemo" method="post" enctype="multipart/form-data">
            <div class="form-group">
                <label for="files">Upload Single or Multiple PDF Files:</label>
                <input type="file" multiple name="files" class="form-control" required id="">
            </div>
            <div class="form-group">
                <button class="btn btn-danger btn-block">
                    Merge PDF
                </button>
            </div>
        </form>
      </div>
</body>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</html>

<!DOCTYPE html>

<html>

<head>

<title>Merge Multiple PDF Files in Node and Express</title>

<link

rel="stylesheet"

href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"

</head>

<body>

Merge PDF Files

</h1>

<label for="files">Upload Single or Multiple PDF Files:</label>

</div>

Merge PDF

</button>

</div>

</form>

</div>

</body>

</html>

index.js

const express = require("express");

const bodyParser = require("body-parser");

const fs = require("fs");

const pdfMerge = require('easy-pdf-merge');

const app = express();

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

const PORT = process.env.PORT || 5000;

app.use(express.static("public"));



var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, "public/uploads");
  },
  filename: function (req, file, cb) {
    cb(
      null,
      file.fieldname + "-" + Date.now() + path.extname(file.originalname)
    );
  },
});

var dir = "public";
var subDirectory = "public/uploads";

if (!fs.existsSync(dir)) {
  fs.mkdirSync(dir);

  fs.mkdirSync(subDirectory);
}

app.get('/mergepdf',(req,res) => {
  res.render('mergepdf',{title:"Concatenate or Merge Multiple PDF Files Online - Free Media Tools"})
})


var mergepdffilesupload = multer({storage:storage,fileFilter:mergepdffilter})


app.post('/mergepdf',mergepdffilesupload.array('file',100),(req,res) => {
    const files = []
    outputFilePath = Date.now() + "output.pdf"
    if(req.files){
      req.files.forEach(file => {
        console.log(file.path)
        files.push(file.path)
      });

      pdfMerge(files,{output:outputFilePath})
      .then((buffer) => {
        res.download(outputFilePath,(err) => {
          if(err){
            fs.unlinkSync(outputFilePath)
            res.send("Some error takes place in downloading the file")
          }
          fs.unlinkSync(outputFilePath)
        })
      })
      .catch((err) => {
        if(err){
          fs.unlinkSync(outputFilePath)
          res.send("Some error takes place in merging the pdf file")
        }
      })
    }
})

const express = require("express");

const bodyParser = require("body-parser");

const fs = require("fs");

const pdfMerge = require('easy-pdf-merge');

const app = express();

app.use(bodyParser.urlencoded({ extended: false }));

app.use(bodyParser.json());

const PORT = process.env.PORT || 5000;

app.use(express.static("public"));

var storage = multer.diskStorage({

destination: function (req, file, cb) {

cb(null, "public/uploads");

filename: function (req, file, cb) {

cb(

null,

file.fieldname + "-" + Date.now() + path.extname(file.originalname)

);

});

var dir = "public";

var subDirectory = "public/uploads";

if (!fs.existsSync(dir)) {

fs.mkdirSync(dir);

fs.mkdirSync(subDirectory);

}

app.get('/mergepdf',(req,res) => {

res.render('mergepdf',{title:"Concatenate or Merge Multiple PDF Files Online - Free Media Tools"})

})

var mergepdffilesupload = multer({storage:storage,fileFilter:mergepdffilter})

app.post('/mergepdf',mergepdffilesupload.array('file',100),(req,res) => {

const files = []

outputFilePath = Date.now() + "output.pdf"

if(req.files){

req.files.forEach(file => {

console.log(file.path)

files.push(file.path)

});

pdfMerge(files,{output:outputFilePath})

.then((buffer) => {

res.download(outputFilePath,(err) => {

if(err){

fs.unlinkSync(outputFilePath)

res.send("Some error takes place in downloading the file")

}

fs.unlinkSync(outputFilePath)

})

.catch((err) => {

if(err){

fs.unlinkSync(outputFilePath)

res.send("Some error takes place in merging the pdf file")

}

})

}

})

<div class="col-md-4 col-sm-6 col-xs-12">
    <div class="content colour-6">
      <h3 class="text-center">Merge PDF</h3>
      <div class="text-center">
        <a class="btn btn-danger" href="/mergepdf">Convert Now</a>
      </div>
    </div>
  </div>

<h3 class="text-center">Merge PDF</h3>

<a class="btn btn-danger" href="/mergepdf">Convert Now</a>

</div>

Node.js Express Merge Multiple PDF Files Using Easy-PDF-Merge Library Full Tutorial 2020

Live Demo

Get Started

Source Code

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Live Demo

Get Started

Source Code

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