A collapsible accordion section — common for FAQ pages — can be built entirely with the native HTML `` elements, which handle the expand/collapse behavior automatically without any JavaScript or ARIA attributes needed.
Enter your question (header) and answer content, see it rendered as a clickable collapsible section, then copy the HTML and CSS needed to style the same native accordion pattern in your own FAQ or content section.
Using the semantic `` elements rather than a custom JavaScript-built accordion means the collapse behavior works correctly out of the box, including proper keyboard accessibility and screen reader support, without needing to reimplement any of that behavior manually.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Frequently asked questions
Do I need JavaScript for the expand/collapse behavior?
No, the native HTML details/summary elements handle expand and collapse behavior automatically in every modern browser — no JavaScript required.
Is this accessible for keyboard and screen reader users?
Yes, since details/summary is a native HTML pattern, it comes with built-in keyboard operability and correct semantics for assistive technology without any extra work.