I built this over the weekend because I was frustrated with: 1) Image file size limits on job application portals 2) Sites automatically compressing images and losing quality 3) Having to upload images to random compression tools

bildklein.ch compresses images 100% locally in your browser using Canvas API. No uploads, no tracking, no server-side processing.

Features: - Client-side only (images never leave your device) - Free and open source - Up to 90% file size reduction - Simple drag & drop interface - Works on mobile and desktop

Tech stack: Next.js 14, TypeScript, Canvas API, Tailwind CSS

Happy to hear feedback and feature requests!