text‑rendering Tester - Online Optimize Legibility
Compare text‑rendering: auto, optimizeSpeed, optimizeLegibility, geometricPrecision. See kerning and ligature changes live.
UD5 Toolkit
👋 Welcome to the Rich-Text Playground!
This is a live contenteditable editor. Try selecting text and applying cool effects from the toolbar above!
You can highlight text, add outline strokes, or make things glow like neon. ✨
Type freely, paste content, or experiment with gradient text effects — all in real time!
contenteditable attribute is an HTML global attribute that makes any element directly editable by the user in the browser. When set to "true", it turns a regular HTML element (like a <div>) into a rich-text editing surface that supports formatting, cursor positioning, and real-time text manipulation without needing a separate text editor library.contenteditable, including Chrome (v4+), Firefox (v3.5+), Safari (v3.1+), Edge (v12+), and Opera (v9+). It has been a stable web standard for over a decade and works reliably across desktop and mobile platforms.<span> with custom CSS classes. You can layer multiple effects on different portions of text, and use the "Clear FX" button to remove them..html file. You can also click View HTML to inspect the raw markup.<textarea> only supports plain text with no formatting. contenteditable elements support full rich-text editing — bold, italic, colors, links, images, and custom CSS effects — making them far more versatile for WYSIWYG (What You See Is What You Get) editing experiences. Contenteditable also preserves HTML structure and can contain nested elements.background-clip: text), neon glows (using layered text-shadow), 3D shadows, and text outlines (using -webkit-text-stroke). These effects work because the content remains real HTML elements in the DOM.element.innerHTML (for rich HTML) or element.innerText (for plain text). The document.execCommand() API provides programmatic control over formatting (bold, italic, etc.), while the Selection API and Range API let you manipulate specific text ranges — which is how this playground wraps selected text in custom effect spans.document.execCommand() API is deprecated (though still widely supported). For production-grade rich text editors, libraries like TipTap, Quill, or Slate are often recommended — but for many use cases, native contenteditable with careful handling works excellently, as this playground demonstrates.Compare text‑rendering: auto, optimizeSpeed, optimizeLegibility, geometricPrecision. See kerning and ligature changes live.
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Enter a URL and see a simulated preview of how the link will appear on major social platforms. Check tags.
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Generate a random, somewhat meaningful song lyric line. Write your own hit with AI‑free randomness. All local.