HTML-in-Canvas Generator

Before HTML-in-Canvas, canvas-heavy apps had an awkward choice. Draw text as pixels with fillText and you lose text selection, screen reader access, Find-in-Page, translation, autofill, and copy and paste. Float HTML overlays on top of the canvas and you get drift, tearing, and z-order problems, because the overlay always sits on top of the whole canvas and cannot sit behind a 3D object or inside a reflection.

HTML-in-Canvas, shipping in Chrome 157, removes that trade-off for Chromium browsers. You put real HTML inside the canvas element, mark it drawable, and draw it with drawElementImage. The element stays in the DOM, so browser features keep working, and the canvas can still be exported with toBlob, toDataURL, or captureStream. That makes it useful for canvas workspaces, 3D scenes and games, media editing tools, and expressive shader-driven interfaces where HTML needs to live inside the scene, not on top of it.

How drawElementImage works in 2D

First, prepare the canvas with content="drawable". Second, put your HTML in a child element marked drawable. Third, get a 2D context and call ctx.drawElementImage(element, x, y). In 2D, the browser synchronises the interaction geometry automatically, so clicks and selection line up with what you see. Listen for the paint event and redraw there, so the canvas updates when the HTML changes. In WebGL and WebGPU the pattern is different: you pass a transform to updateElementGeometry instead of relying on automatic sync.

HTML-in-Canvas versus html2canvas

html2canvas is still useful, and it works in more browsers, but it is a different kind of tool. It walks the DOM, reads computed styles, and repaints everything itself in JavaScript. That means some CSS, fonts, shadows, and filters can be lost or rendered differently. HTML-in-Canvas does not re-implement rendering. The browser renders the element, so what you see in the canvas matches the real page much more closely, and the element remains interactive. The trade-off is support: at launch this is Chrome 157 and newer only, which is why every code sample from this generator includes a detection check and a fallback path.

How to use this generator

Paste your HTML on the left and your CSS on the right, set the canvas size and draw position, then press Render preview. If your browser supports the API, you will see the live canvas preview and can download it as a PNG. If it does not, you will see a fallback preview and the generated code will still be correct for Chrome 157 users. Copy the code, paste it into your project, and keep the fallback branch for Firefox and Safari visitors. Do not ship a canvas-only interface without that fallback, because those visitors would otherwise see nothing.