How do collapsible sections work in Markdown?

They use HTML and tags, which are supported in GitHub Flavored Markdown.

Can I nest collapsible sections?

Yes, you can nest blocks inside each other.

Collapsible Section Generator

Create HTML details/summary blocks that work in GitHub Flavored Markdown. Build collapsible sections for FAQs, long code blocks, or supplementary content.

Section 1

Summary (visible when collapsed)

Content (visible when expanded)

Output

<details>
<summary>Click to expand</summary>

Hidden content goes here.

</details>

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Frequently Asked Questions

How do collapsible sections work in Markdown?: They use HTML <details> and <summary> tags, which are supported in GitHub Flavored Markdown.
Can I nest collapsible sections?: Yes, you can nest <details> blocks inside each other.

Guides for this tool

Use a focused example when you need platform-specific syntax or a repeatable document workflow.

Collapsible Sections in GitHub Markdown

Learn how to create expandable details sections in GitHub Markdown with the HTML details and summary elements.

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About Collapsible Section Generator

Generate collapsible/expandable sections for Markdown. Free online details/summary block builder. This tool runs entirely in your browser, so your content is not sent to a server. MarkdownMe provides free, fast, and reliable Markdown tools for developers, writers, and anyone who works with Markdown.