How I Built 100 Browser-Based Image Tools With No Server (FFmpeg WASM, PDF-lib, AI Background Removal)

When I started building ImgToolkit, the goal was simple: every image tool site I used either uploaded my files to some server I didn't trust, watermarked the output, or locked the useful features behind a $12/month plan. I wanted to build something where everything runs in the browser. Your files never leave your device. No server, no account, no paywall. This is the technical breakdown of how I got 100 tools working entirely client-side. The core idea: the browser is powerful enough Modern brow