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 dithering

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

Drop-in WebP, AVIF, and JPEG XL delivery for TYPO3 images — automatic, no URL or template changes

A powerful desktop application for performant batch image compression and optimization. Reduce file sizes without sacrificing quality.

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

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。

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。

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

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

IIIF Server - Simple Image Presentation Interface