This completely JavaScript image processing library was created for Node and has no native dependencies. It is completely ubiquitous and does not rely on anything outside of itself. Jimp can assist you with a variety of duties, including blurring, coloring, containing images, and blitting. Jimp’s Node.js syntax is another benefit, making it simple to use for those with Python or C++ as their main programming languages.

A well known and powerful library for image manipulation is Caman.js. It offers various built-in functions as well as the possibility to be extended. Also, the library is well documented and can be used both in NodeJS and in the browser. 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.

canvas.ondragleave = function(e)

Canvas.toBlob Creates a Blob object representing the image contained in the canvas. It can accept an arbitrary amount of color channels and can handle an additional alpha component. Image-js can work with images that have 1 , 8, 16 or 32 bits per channel. Flatlogic is the easiest way to generate React, Angular, Vue boilerplates for full-stack web apps in just 3 steps. We offer a platform with starters/templates, CRUD app generator and hosting, all combined making a perfect solution for web development.

  • Given how simple the manipulation I want to do is this doesn’t seem impossible.
  • 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 .
  • We will also look into how image smoothing (anti-aliasing) can be controlled and how to save images from your canvas.
  • Alignment modes are supported by replacing the str argument with an object containing text, alignmentX and alignmentY.
  • I am a full-stack developer who also loves to write tutorials.

The main drawback is that it will only be supported in newer browsers. If you’re looking for a way to process or manipulate pictures in your web project, it might be worth having a look at some of the libraries introduced in this blog post. Most of them provide basic operations like adjusting brightness and contrast, greyscale and inverting and image while others mainly focus on easy understandable code or extendability. The next sections will help you find out which tool fits your requirements.

context = canvas.getContext(“2d”),

It doesn’t use HTML javascript image manipulations , but reads in the image to process from a path or a url. Note that operations that involve changing the orientation or the size of the image are not provided by grafi.js. Once you have generated a data URL from your canvas, you are able to use it as the source of any or put it into a hyperlink with a download attribute to save it to disc, for example. Unlike many other libraries, if a 16-bit greyscale PNG is decoded, the resulting image has only one 16-bit channel and no pixel information is lost.


Filerobot is one of the most feature-rich free JavaScript image editors that you will find. You can easily adjust the brightness, contrast, saturation, and exposure of the images. There are also some built-in effects and filters in case you want something that will give you results similar to Instagram filters. Fabric.js is a JavaScript library that makes working with HTML Canvas easy. It provides a unique object model and interactive platform to work with Canvas.

Image Processing in Javascript

Note that unlike WebGL textures, FIM allows an operation to have a single image used as both an input and an output parameter. FIM automatically manages any temporary objects needed to make it work. Npm i @leosingleton/fim – fim contains the common implementation of FIM and is a dependency of fim-browser and fim-node. NPM packages can take a dependency on this package to create packages that are platform-agnostic and let the consumers of the package pick between fim-browser and fim-node. // this image is 1280 x 768, pixels are loaded from the given buffer. If Jimp.AUTO is passed as the MIME type then the original MIME type for the image (or “image/png”) will be used.

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The FIM library provides fast, 2D image manipulation in web browsers and Node.js using WebGL. Using a mix of hamming distance and pixel diffing to compare images, the following code has a 99% success rate of detecting the same image from a random sample (with 1% false positives). The test this figure is drawn from attempts to match each image from a sample of 120 PNGs against 120 corresponding JPEGs saved at a quality setting of 60. // rotate the image counter-clockwise by a number of degrees. If `false` is passed as the second parameter, the image width and height will not be resized.

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Besides giving you control over things like the contrast, brightness, and saturation of an image, Pintura comes with built-in filters to help you quickly edit images. The Filterous 2 library is another great option for people who just want a library to quickly apply some popular and well-known preset effects on images. It comes with around 40 different Instagram-inspired filters to apply to your images. CamanJS is another popular JavaScript-based image editor that comes with a decent feature set.

These can be adjusted by different parameters to create unique results. Check out the project’s website to see a demo and download the library. Like the first two libraries, glfx.js is a powerful tool which provides a wide range of functions. The cool thing about this is, that image processing operations are done using the graphic card and can therefore run in real-time.

This is not a problem when you are editing small images or when users don’t mind waiting for a bit in order to see the final results. However, it is not possible for a CPU to show real-time results when it has to do all these calculations for millions of pixels. It comes with its own user interface, but you also get the option to use the API directly to edit the images. There are light and dark themes in the editor, and you can choose whether to place the image editing controls on the left, right, top, or bottom. It comes with a large variety of methods to adjust the brightness, contrast, saturation, vibrance, sharpness, noise, and many other things.

// An optional resize mode can be passed with all resize methods. Phin uses http.request(options) or https.request(options) methods for making HTTP requests. Phin parses a url with the url.parse(…) method and passes it with all the other parameters as an options to the http.request(options) or https.request(options) methods.


The height is computed automatically to preserve the aspect ratio. Given how simple the manipulation I want to do is this doesn’t seem impossible. However, I cannot find a crop/resize library that doesn’t ultimately have an external or native dependency. 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.

Powerful image manipulation tool to manipulate images easily.

Some additional effects are included in the library, like a grayscale or color halftone that gives images a comic-like look. You can also distort the images using a bunch of warping filters that can create a bulging, swirling, or perspective-changing effect. You can also apply effects like blurring, sharpening, and edge detection to images by using a convolution matrix. The things that I like most about the library are its ease of extensibility and the control the library gives to its users. It is possible for you to register your own filters and blend modes with the library and apply them directly to different images.

The primary object in FIM is a FimImage and image instances can be created using the methods on the Fim interface. On the plus side, it is highly adjustable and a nice way to get an understanding of image manipulation algorithms. I remember vividly the first time I saw Google Maps in the browser.

javascript image manipulation

Npm i @leosingleton/fim-browser – fim-browser contains the in-browser implementation of FIM. You can then use this in distanceFromHash to calculate the hash distance from a loaded image. The hamming distance between the binary representation of these hashes can be used to find similar-looking images. Alignment modes are supported by replacing the str argument with an object containing text, alignmentX and alignmentY. AlignmentX defaults to Jimp.HORIZONTAL_ALIGN_LEFT and alignmentY defaults to Jimp.VERTICAL_ALIGN_TOP. The following modes can be used for compositing two images together.

  • The test this figure is drawn from attempts to match each image from a sample of 120 PNGs against 120 corresponding JPEGs saved at a quality setting of 60.
  • There are light and dark themes in the editor, and you can choose whether to place the image editing controls on the left, right, top, or bottom.
  • Npm i @leosingleton/fim-browser – fim-browser contains the in-browser implementation of FIM.
  • You will rapidly learn how to navigate and comprehend this library.
  • To get an overview of the functions provided by the libraries, have a look at the following table.

Pixelapp is another image editor that you can use to edit images with WebGL. It gives you the option to adjust the values for brightness, contrast, saturation, shadows, tint, hue, and many other properties. All of these effects are divided into four categories called light, color, detail, and effects. This includes zoom blur, lens blur, and tilt shift, in addition to uniform blurring of the whole image.

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Less than 2 kb in size, this JavaScript picture manipulation library is incredibly small. However, its efficacy prevents us from leaving it off the list because it gracefully downgrades the images you give it. Another JS utility on our list is Grade, which should come as no surprise.

Canvas.toDataURL(‘image/jpeg’, quality) Creates a JPG image. Optionally, you can provide a quality in the range from 0 to 1, with one being the best quality and with 0 almost not recognizable but small in file size. The HTMLCanvasElement provides a toDataURL() method, which is useful when saving images. It returns a data URL containing a representation of the image in the format specified by the type parameter .

What is the best image manipulation library for NodeJS?

Sharp is one of the best image processing libraries for NodeJS. If all you're doing is resizing, converting, or slightly editing images, this is what you need. Sharp is insanely fast, benching high above GraphicsMagik and JIMP. The main downside is that it has a rather small feature set compared to other libraries.

Instead of explicitly calling backupAsync(), the property may be enabled to automatically take a backup after every operation that writes its output to the image. Note that this also incurs a significant performance overhead, so should be used sparingly. More complex operations involving multiple passes will need to derive from FimOperation directly. The operation can either manage instances WebGL shader instances manually using Fim.createGLShader(), or it can compose otherFimOperation instances to create multi-pass operations.

What is Jimp in NodeJS?

In a Node. js application, Javascript Image Manipulation Program (or JIMP) makes it easier to manipulate images to achieve whatever design we want. JIMP provides the functionality to crop, resize, blur, and add effects to images.

There are two available themes called light and dark, but you can create your own themes to match the color scheme of the website where you plan to integrate the editor. We have covered the basics of image manipulation, text generation, and loading from a remote source. Powerful image manipulation tool to manipulate images easily. A program may call FimImage.backupAsync() to back up any image data stored in GPU memory.

Is JavaScript used for image manipulation?

js is another popular JavaScript library for image manipulation. You can use it to crop your images in all possible ways, change aspect ratio, rotate, zoom and work with canvas data. Cropper. js is the right choice for cropping without any extra features.