CSS Accordion Generator

Pure HTML5 & CSS3 • No JavaScript Needed • Ideal for FAQ Sections

Single Open = opening one item closes the others (classic FAQ). Multiple Open = each item toggles independently.
Border Radius10px
Spacing Between Items12px
Animation Duration0.3s
Live Preview — Click to Expand
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About CSS Accordion Generator

            
This tool builds a fully working collapsible accordion using nothing but HTML5 and CSS3 — the target site never needs to load a script for it to work. It relies on the classic "checkbox/radio hack": a hidden checkbox or radio input paired with a label, styled with the modern CSS Grid 0fr → 1fr technique for a genuinely smooth open/close height animation, without guessing a fixed pixel height. Choose Single Open mode (radio inputs sharing one name, so opening an item closes the others — the classic FAQ pattern) or Multiple Open mode (independent checkboxes). Add as many question/answer items as you like, customize colors, spacing, corner radius, animation speed, and icon style, then copy the HTML and CSS separately and paste them into your own page. All processing happens locally in your browser.