WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.

The smallest, simplest and fastest JavaScript pixel-level image comparison library

The fastest pixel-by-pixel image visual difference tool in the world.

Layout and functional testing framework for websites

MulimgViewer is a multi-image viewer that can open multiple images in one interface, which is convenient for image comparison and image stitching.

High dynamic range (HDR) image viewer for graphics people

Image comparison slider. Compare images before and after. Supports React, Vue, Angular.

Backend and Frontend application for tracking differences via image comparison

Published on Maven Central Java Library that compares 2 images with the same sizes and shows the differences visually by drawing rectangles. Some parts of the image can be excluded from the comparison. Can be used for automation QA tests.

🖼🔬 JavaScript Image Comparison

Image comparison using node-canvas

A script in python to organize your images by similarity.

Perform visual regression test with a nice GUI as help. 💅 Only for Cypress!

A program that compares two images using a perceptually based image metric

Java library to create customized full page/frame/elements screenshots using Selenium WebDriver and Java AWT, screenshots and images comparison and many more cool stuff

CLI utility to find near duplicate images and remove all but the best copy.

OSnap is a snapshot testing tool, which mainly focuses on speed and ease of use.

UI testing via image comparison and devcards

vips-powered ruby gem to measure images similarity, implementing dHash and IDHash algorithms

Tool to detect (and get rid of) similar images using perceptual hashing (pHash lib)