How to find Files by Extension in Node JS?

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Today what you are going to learn:

Hello Brother, i will let you know lesson of node js find all files with extension. In this article, we will implement a node js get file with extension. if you want to see lesson of node js filter file extensions then you are a right place. let’s discuss about find files by extension node js. Let's see bellow lesson filter files by extension node js *.html *.jpg *.png *.pdf *.docs.

We will use fs npm package for filter by file extension in folder recursively using node.js. fs package provide readdirSync() and statSync() for search file by extension. let's see simple lesson

Lesson 1: Create Node App

run bellow command and create node app.

mkdir my-app

cd my-app

npm init

Lesson 2: Create server.js file

Make sure, you have add file on "uploads/" folder with some files path.


var fs = require('fs');

var path = require('path');

function findFileByExt(folderPath, ext)


var files = fs.readdirSync(folderPath);

var result = [];


function (file) {

var newbase = path.join(folderPath,file);

if ( fs.statSync(newbase).isDirectory() ){

result = findFileByExt(newbase,ext,fs.readdirSync(newbase),result);

} else {

if ( file.substr(-1*(ext.length+1)) == '.' + ext ){






return result;


var folderPath = './uploads';

var files = findFileByExt(folderPath, 'png');


now you can simply run by following command:

node server.js


thank you very much for following up with me.


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