Questions about the Markdown to HTML API

The things developers ask before wiring up the Markdown to HTML API — what it returns, what it covers, and where the limits are. Straight answers, no fluff.

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What Markdown syntax is supported?
We support GitHub Flavored Markdown (GFM) including headers, bold, italic, links, images, code blocks, tables, task lists, and more.
Is the HTML output sanitized?
Yes, the output is sanitized to prevent XSS attacks. Inline HTML in Markdown is handled safely.
Does it support syntax highlighting?
Code blocks are wrapped with language classes for client-side syntax highlighting with libraries like Prism or Highlight.js.
Can I convert HTML back to Markdown?
This API converts Markdown to HTML. For the reverse, check our HTML to Text API or specialized tools.
What is the maximum input size?
The API accepts Markdown documents up to 100KB. For larger documents, consider splitting into sections.
Does it support custom extensions?
We support standard GFM extensions. Custom Markdown extensions are not currently supported.

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