ImageMagick is a free, open-source software suite for creating, editing, converting, and displaying images. It supports 200+ formats and offers powerful command-line tools and APIs for automation, scripting, and integration across platforms.

Converting HEIF/HEIF image formats to PNG/GIF/JPEG in the browser

Screen{shot,cast} and perform ImageOps on the command line 🌱 🏞️

🔀 Convert small PNG images to SVG Tiny 1.2

Convert HEIC/HEIF images to JPEG, PNG in browser

🎨 Convert images to 15/16-bit RGB color with dither

Batch image resizer, optimiser and profiler using ImageMagick convert, OptiPNG, JpegOptim and optional ZopfliPNG, Guetzli and MozJPEG.

A guided AVIF/JPEG XL/WebP conversion utility for JPEG and PNG sources.

UGATITによる画像変換器

A lightweight image converter which supports PNG, PNM, BMP, QOI, JPEG-LS, and H.265 intra-frame.

Converts images to Master System data formats

PHP library to convert between gif, jpeg, png and webp image files

A Node wrapper for the FLIF executable

Here are some libraries about using the browser to do image processing (format conversion), and make the corresponding demo pages.这里收集了一些关于使用浏览器做图片处理（格式转换）的库，并制作了相应的演示页面。

♻️ Reusable, scalable, bash scripts to create and optimize images.

ImageGlider 是一个基于 .NET 8 和 ImageSharp 的跨平台批量图像格式转换工具，支持 AOT 编译。它能自动扫描指定扩展名的图像文件，将其转换为目标格式，并智能管理输出、失败文件及日志记录，为图像转换提供高效便捷的解决方案。

Simple Image Presentation Interface

Convert (and compress) lots of image formats into JPEG, PNG and WebP formats.

Simple methods to convert between OpenCV's cv::Mat and Qt's QImage and QPixmap

Python tool for downsizing Microsoft PowerPoint presentations (pptx) files.