How an Online Stamp Maker Works: A Deep Dive into Browser-Based Design Tools

Building a browser-based design tool sounds straightforward — until you realize users expect Photoshop-level control, instant previews, and multi-format exports, all without installing anything. Having spent time building an online stamp maker, I want to walk through the real technical challenges behind this kind of product and how we solved them. - The Core Rendering Decision: Canvas vs SVG The first architectural decision in any browser-based design tool is the rendering engine. You have two primary options: HTML5 Canvas and SVG DOM. Each has a fundamentally different model. Canvas is a pixel-based imperative API. You draw to it with commands: const ctx = canvas . getContext ( ' 2d ' ); ctx . beginPath (); ctx . arc ( 200 , 200 , 180 , 0 , Math . PI * 2 ); ctx . strokeStyle = ' #1a1a1a ' ; ctx . lineWidth = 4 ; ctx . stroke (); The canvas doesn't know about the circle after drawing it. It's pixels on a bitmap. This makes it fast for rendering complex scenes, but terrible for interact