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Katarina Harbuzava for Flatlogic

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12 JavaScript Image Manipulation Libraries For Your Next Web App

Today we would like to talk to you on a topic most interesting – JavaScript image manipulation libraries. And, to be more precise – those JavaScript image manipulation libraries that definitely deserve your particular attention when you develop your next spectacular web app. But, let’s not get ahead of ourselves and firstly answer the question “What is an Image Manipulation Library?”

What is an Image Manipulation Library

Let’s start with a simple description. An image manipulation library or IML is a tool that’s main goal is to help you systemize, organize and manipulate graphic elements of your app in different ways. Different image manipulation libraries typically serve different purposes and can perform such goals as cropping the images, resizing them, converting them from one format to another, improving their quality and many-many more. So, all and all, a tool to use when making a web app. Unless, of course, you want to make a dull monochrome app that contains no images whatsoever, which is an unrealistic scenario in a modern world, where design can make or break an app just as easily as its functionality or usability.

What does JavaScript Image Manipulation Libraries bring to the table?

The next question to discuss when is the reasoning for choosing an image manipulation library, based on JavaScript, for your next web app instead of, for example, C++-based ones. The answer is simple: even though at first glance JavaScript IMLs are metaphorically heavier, they are reliable and can create some simply astounding result.

The practical usage of some of the entries you are going to see in this article in a short time is a thing of beauty and will do nothing less than improve the development of your next web app by easing the work with the images. So, without any further delays, let’s get down to the list.

JavaScript Image Manipulation Libraries


Pica is a prime tool for in-browser image resizing, most useful when you want to reduce an exceedingly large image into a suitable one in order to save upload time. It avoids the pixelation of an image and works at a suitably fast pace. It serves a great amount of server resources on image processing and can reuse your images into thumbnails in the browser. What’s also great about Pica is the fact that it auto selects such technologies as web workers, webassembly, createImageBitmap, pure JS, etc. automatically, so there is no need for you to do it yourself.



Lena.js can be described as a very simple, yet nice and neat image redactor and processor. It has a number (22 to be precise) image filters that you can play around with to improve your image. Lena.js is very small in size and has a killer feature that allows you to add your own filters, as it’s code is open to anyone at GitHub.



Jimp stands for JavaScript image manipulation program and it does what it says on the tin a flawless fashion. Written for Node, this entirely JavaScript image processing library has zero native dependencies. It also has no external dependencies either, which makes it quite universal. Jimp can help you with such tasks as blitting, blurring, colouring, containing images and many others. What also advantages Jimp is its Node.js syntax that is will prove an easy use for people with Python or C++ primary prior experience.



Grade (not a big surprise) is another JS library on our list. Its main selling point is producing complementary gradients that are automatically generated based on 2 colours that are determined predominant in the selected images. Such an effect allows your site or app to seem more seamless. Grade is an easy to use plugin that will add an aura of visually pleasing aesthetic to your finished product, which is always nice for both you and the end user.



Now let’s get to a more intrinsically complex JavaScript image manipulation library. MarvinJ is a powerful Marvin Framework derivative that offers quite a number of algorithms for the images’ colour and appearance manipulation. It allows you to have an easier working process when it comes to such image processing fundamentals as corners and shapes, as MarvinJ is able to detect these features automatically. This way it simplifies the process of cropping out the image and even makes it more or less automated. And isn’t it, after all, the dream – to leave the tedious and boring thing like cropping the elements out to the machines while you can concentrate on more time-, imagination- and expertise-consuming tasks?



And now back to the simpler stuff. Compressor.js’s whole schtick is in the name – it handles the image compression and does it well. All thanks to the canvas.toBlob API that allows you to set the compression output quality of the image in the range from 0 to 1.



Does your next web app need such simple, yet if used correctly, shapes as rectangles, circles, triangles and other polygons? May it be so that it requires more complex shapes? If the answer is “Yes” to any or both of the questions then Fabric.js is your guy – it will not only create all these shapes for you, but also allow you to manipulate every aspect of it, such as sizes, positions and rotations of the objects. But wait, there is more: control all the attributes of the upper-mentioned objects: colours, level of transparency. level of depth position and so on.

You might have noticed that we haven’t said a thing about images. But that meal is also on the menu, as Fabric.js allows to convert SVG images into JavaScript data and insert it into the canvas of the project. So, that’s killing two birds with one stone: cool shapes and SVG images in your apps code.



And, once again, to the more complex JavaScript image manipulation libraries. CamanJS is a combination of fantastic and sometimes quite advanced techniques and an intuitive interface. You can use presets and filters or tinker around toggling them yourself. The cherry on top is the ability to add your own filters and plugins, as well as constant updating, that bring new features and functions.



We duly hope that you are not tired of the “simple-complex” swings of our list, as here comes another simpler JavaScript image manipulation library. It allows you to crop the needed images, as well as scaling, rotating and zooming around the image. But the nicest thing about this JSIML is the ability to set the aspect ratio on the picture and crop accordingly.


Merge Images

A unique entree of this list, as Merge Images doesn’t crop or skew or rotate the images. We hope, you’ve already guessed what this one does – it merges the given images onto one canvas, ridding you of the need to transform them into code and working on a canvas (pun intended).



This JavaScript image manipulation library is tiny, as it weighs less than 2 kb. But it’s effectiveness doesn’t allow us to not include it on the list, as it downgrades the pictures that you provide it with, and does it gracefully.



Doka is a JIML which will provide you with a variety of image editing. It has a rich UI that warms your soul if needed. The support for React, Vue, Svelte, Angular, jQuery is also a nice and needed touch during the working upon the images. You will get around and understand this Library quite quickly.


Conclusions to have

And that’s the list. Conclusions to have are quite simple: your next project will benefit from using these JavaScript image manipulation libraries, as it will get you free from performing mundane tasks and you will find yourself in love with them in no time.

Start with one, if you feel cautious, add more if you feel adventurous, as it may actually require some tinkering to work the way you want it to work.

That’s it for today. Thanks for reading this article and stay tuned for our new ones!

About Flatlogic

At Flatlogic, we help businesses to speed up web development with our beautifully designed web & mobile application templates built with React, Vue, Angular, React Native, and Bootstrap. During the last several years we have successfully delivered more than 100 custom dashboards and data management solutions to various clients starting from innovative startups to established and respected enterprises.

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