Design beautiful CSS accordions and collapsible panels with live preview. Customize styles, sizes, animations, icons, and behavior — copy the generated CSS and HTML instantly.
Click items to expand/collapse
CSS Accordion Generator is a free online tool that helps developers and designers create beautiful, collapsible accordion panels without writing CSS from scratch. Customize styles, sizes, animations, icons, and behavior through an intuitive visual interface, then copy the generated CSS and HTML code directly into your projects. Whether you are building FAQs, product features, or content sections, this tool accelerates your workflow. All processing happens in your browser — no data is sent to any server.
A CSS accordion is a UI component that allows users to expand and collapse content sections. It uses the HTML details/summary elements or CSS transitions to create smooth animations. Accordion panels save vertical space and help organize content into scannable sections.
No. The generated code uses the native HTML details and summary elements with CSS transitions, which work without any JavaScript. This ensures fast loading, better accessibility, and compatibility with all modern browsers.
Single mode allows only one panel to be open at a time — when you open a new panel, the previous one automatically closes. Multiple mode lets users open and close any number of panels independently, which is useful for FAQs and comparison pages.
Yes. The generated CSS uses standard properties and the HTML details element, which is supported in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For older browsers, the accordion still functions but may not animate as smoothly.
Yes. You can adjust the number of items using the slider, and the generated HTML will include the exact number of accordion panels you specify. You can also add or remove items manually in the copied HTML.
Yes, absolutely. The generated CSS and HTML are free to use in personal, commercial, or open-source projects. There are no licensing restrictions.
The live preview renders the generated CSS and HTML in real time as you adjust the settings. You can click the accordion panels in the preview to test the expand and collapse behavior before copying the code.
Yes. All processing happens entirely in your browser. No data is sent to or stored on any server. Your design choices and generated code remain completely private.