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Convert Between PNG & TIFF Files with Node.js & Jimp

Do you need to convert PNG images to a TIFF format? Or TIFF files to a PNG format? This article will walk you through how to do that quickly and easily using Node.js and the Jimp NPM package.

Let's get started!

Table of Contents

Install Jimp NPM Package

First, you need to install the NPM package. You can install it with either the NPM or yarn command below:

NPM:

npm install jimp --save

Yarn:

yarn add jimp

Now we're ready to start writing some code and converting images!

Convert TIFF to PNG

Let's convert a .tiff file to a .png format first. Make sure you have a .tiff file in the root of your project directory that you want to convert to a .png.

Here's the full code:

const Jimp = require("jimp")

Jimp.read("file.tiff", function (err, file) {
  if (err) {
    console.log(err)
  } else {
    file.write("new-image.png")
  }
})

Let's break down each part of the code:

  1. First, we import the jimp NPM package and hold it in the Jimp variable.
  2. Then, we use the Jimp.read() function to process the image into something we can work with. We pass the path of the file.tiff file to the function. And the function returns a promise with an error (if it exists) and a file to work with.
  3. We do some error handling inside the callback function.
  4. Then, we write the new new-image.png file to the current directory with the file.write() function.

And you should see the new-image.png file written to your directory.

Make sense? Cool! Let's move onto the next example in the next section.

Convert PNG to TIFF

Now let's convert a .png file to a .tiff format. Make sure you have a .png file in the root of your project directory that you want to convert to a .tiff.

Here's the full code:

const Jimp = require("jimp")

Jimp.read("image.png", function (err, file) {
  if (err) {
    console.log(err)
  } else {
    file.write("new-file.tiff")
  }
})

Here's the break down for each part of the code:

  1. First, we import the jimp NPM package and hold it in the Jimp variable.
  2. Then, we use the Jimp.read() function to process the image into something we can work with. We pass the path of the image.png file to the function. And the function returns a promise with an error (if it exists) and a file to work with.
  3. We do some error handling inside the callback function.
  4. Then, we write the new new-file.tiff file to the current directory with the image.write() function.

And you should see the new-file.tiff file is written to your directory.

Now you know how to convert back and forth between .tiff and .png files using Node.js and Jimp!