CSS Accordion Generator

Build an accordion with pure CSS

Accordions let users expand and collapse sections of content, saving space and keeping pages tidy. This generator produces an accordion using the native details and summary HTML elements, which provide open-and-close behaviour with no JavaScript at all. You choose the header background, text colour and corner radius, and the tool outputs the CSS plus the simple HTML structure, including a plus-and-minus indicator that flips when a section opens.

Because it uses built-in elements, the accordion is accessible and keyboard-operable out of the box.

Accessible and lightweight

The details element is the modern, standards-based way to build disclosure widgets. It handles the toggling natively, is announced correctly by screen readers, and works even if scripts fail, which is why it is preferred over JavaScript accordions for simple cases. It is perfect for FAQs, nested navigation and progressive content.

Style the summary as the clickable header and the body as the revealed content. The open attribute lets you target the expanded state in CSS. All generation happens locally in your browser.

Notes on the generated code

Because the css accordion generator runs entirely in your browser, you can experiment with every option and watch the generated code update instantly, with nothing uploaded and no account required. The output is clean, standards-based CSS that works in any project without external libraries or a build step, so you can paste it straight into your stylesheet and refine it further by hand whenever you need to.

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