How to get the size of the file synchronously using Node.js?

Published April 11, 2021

To get the size of a file synchronously, you can use the statSync() method from the fs (filesystem) module and then use the size property from the returned stats object in Node.js.

Let's say we have a file called myFile.txt in which you want to get the file size. Here you can use the fs.statSync() method and pass:

  • the path to the file as an argument.
  • the method returns a stats object where we can use the property called size to get the file size.

The size property returns the size of the file in bytes.

It can be done like this,

// require fs module
const fs = require("fs");

// get file size using fs.statSync() method
const stats = fs.statSync("./myFile.txt");

// get size of the file
const size = stats.size;

console.log("File Size is: ", size, "bytes"); // File Size is: 12 bytes

See the above code live in repl.it.

If you want to convert it to mb, you can divide the size by 1024 * 1024 like this,

// require fs module
const fs = require("fs");

// get file size using fs.statSync() method
const stats = fs.statSync("./myFile.txt");

// get size of the file
const size = stats.size;

console.log("File Size is: ", size / (1024 * 1024), "mb");

That's it! 😀

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