Node JS Resize Image Before Upload using Multer Sharp Example

Node JS Resize Image Before Upload using Multer Sharp Example

Resize image before upload using multer, sharp with node js and express js. In this node js tutorial, you will learn how to resize image before upload using multer, sharp with node js and express js.

Image upload is the basic requirement of any application. So this example will guide you step by step on how to resize image before upload using multer in node js. And you can understand a concept of node js compress image before upload.

Node JS Express Resize Image Before Upload Tutorial Example

  • Step 1 – Create Node JS App
  • Step 2 – Install Express and Multer Modules
  • Step 3 – Create Server.js File and Import Modules
  • Step 4 – Create Image Upload Form
  • Step 5 – Start Server

In this step, open your terminal and execute the following command to create node js app:

mkdir my-app
cd my-app
npm init -y

Step 2 – Install Express and Multer Dependencies

In this step, open again your terminal and execute the following command to install express and multer dependencies in your node js app:

npm install express multer --save
npm install sharp --save

Step 3 – Create Server.js File

In this step, you need to create server.js file and import the above install modules in it; as shown below:

const express = require('express');
const multer = require('multer');
const path = require('path');
const sharp = require('sharp');
const fs = require('fs');
const app = express();
  
const storage = multer.diskStorage({
    destination: function(req, file, cb) {
        cb(null, 'uploads/');
    },
  
    filename: function(req, file, cb) {
        cb(null, file.fieldname + '-' + Date.now() + path.extname(file.originalname));
    }
});
  
var upload = multer({ storage: storage })
  
app.get('/', (req, res) => {
  res.sendFile(__dirname + '/index.html');
});
  
app.post('/', upload.single('image'),async (req, res) => {
       const { filename: image } = req.file;
      
       await sharp(req.file.path)
        .resize(200, 200)
        .jpeg({ quality: 90 })
        .toFile(
            path.resolve(req.file.destination,'resized',image)
        )
        fs.unlinkSync(req.file.path)
      
       res.redirect('/');
});
  
app.listen(3000);

Step 4 – Create Image Upload Form

In this step, create index.html file to resize image before upload in node js app. So, add the following html code into it:

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Node js Resize Image Before Upload using Multer Example - Tutsmake
.com</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body>
    <h1>Node js Resize Image Before Upload using Multer Example - tutsmake.com</h1>
    <form action="/" enctype="multipart/form-data" method="post">
      <input type="file" name="image" accept='image/*'>
      <input type="submit" value="Upload">
    </form>  
  </body>
</html>

Click to know more about the express.

Step 5 – Start Server

Execute the following command on terminal to start node js express crop and resize image before upload server:

//run the below command

npm start

after run this command open your browser and hit 

http://127.0.0.1:3000/

Conclusion

In this tutorial, you have learned how to resize or compress image before upload in node js express framework.

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AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

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