What is image-compressor?

Image Compressor is a browser-based tool for compressing and converting images entirely on your own device, with no uploads to any server. The main problem it solves is that most online image compression services require you to upload your files to a third-party server, raising privacy concerns and often imposing file size or batch limits. It works by running compression algorithms inside the browser using WebAssembly (often abbreviated WASM). WebAssembly is a technology that allows compiled, near-native-speed code to run directly in a web browser, which is why this tool can compress images faster than older JavaScript-based approaches. The codec library it uses comes from jSquash, which is derived from Google's Squoosh compression tool. Because everything runs locally in your browser, your images never leave your computer. The tool supports batch processing of ten or more images at once. It offers options including image resizing, color reduction, lossless compression modes, and batch file renaming. A side-by-side comparison view lets you check quality before saving. Supported output formats include modern image types alongside the classics. Someone would use this if they need to compress images quickly without ads, tracking, account creation, or upload restrictions, particularly for privacy-sensitive images or when working with many files at once. The tech stack is TypeScript with React, built using Vite, and can be self-hosted with Docker.