9 Things I Did Wrong Building My Image Tool (And What Actually Fixed Them)

Here's the full post with proper code blocks: 9 Things I Did Wrong Building My Image Tool (And What Actually Fixed Them) webdev #javascript #buildinpublic #beginners I've been building Relahconvert — a free browser-based image toolkit — for about a month now. 37 tools, 25 languages, zero backend for most of it. Sounds clean. It wasn't 😄 Here are 9 real mistakes I made and what actually solved them. "I'll just use a library for that" → Canvas API My first instinct for image processing was to reach for a library. Turns out the browser's Canvas API handles resize, crop, flip, grayscale, and more natively. No dependencies. No bundle size. Just pixels. javascriptconst ctx = canvas.getContext('2d'); ctx.drawImage(img, 0, 0, newWidth, newHeight); canvas.toBlob(blob => downloadFile(blob), 'image/jpeg', 0.9); I now use this for 90% of my tools. "Dark mode needs JavaScript" → prefers-color-scheme I built a whole JS toggle system before realizing the browser already knows what the user wants.