CSS‑Only Accordion Builder - Online No JavaScript FAQ
Configure and generate a pure CSS accordion with details/summary styling. Copy the HTML/CSS. Accessible and lightweight.
UD5 Toolkit
Generate clean, dependency-free HTML accordions using semantic <details> / <summary> elements. No frameworks, no JavaScript bloat — just copy & paste.
Zero dependencies — pure HTML + CSS + optional minimal JS
Everything you need to know about HTML accordions and this generator
<details> and <summary> elements. The output code has zero external dependencies, loads instantly, works in all modern browsers, and is fully accessible out of the box. You get a clean, self-contained HTML file you can drop anywhere.
<details> elements without any JavaScript.
<details> elements is fully crawlable by search engines like Google. Unlike JavaScript-heavy tabs or accordions that hide content behind display:none, the <details> element keeps all text in the DOM and accessible. Google has confirmed that content inside expandable sections is indexed and weighted normally, making accordions a great choice for FAQ pages, documentation, and mobile-friendly content layouts.
<details> / <summary> combo provides excellent built-in accessibility. Screen readers announce the expandable state, keyboard users can navigate with Tab and toggle with Enter/Space, and the browser handles all ARIA attributes automatically. This generator enhances that foundation with clear focus styles, sufficient color contrast, and smooth transitions that respect the user's prefers-reduced-motion setting.
<summary> element provides a generous tap target by default, and our CSS ensures proper spacing and readability on screens of all sizes. Accordions are particularly useful on mobile because they help organize long content without overwhelming the user with endless scrolling.
<style> tag and the HTML structure uses semantic elements. If you're using a CMS like WordPress, you can paste it into a Custom HTML block. For static sites, just include it in your page's body. No additional scripts or stylesheets are needed.
Configure and generate a pure CSS accordion with details/summary styling. Copy the HTML/CSS. Accessible and lightweight.
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