Convert Markdown to HTML in one API call.
Paste any Markdown and get clean, ready-to-render HTML back — CommonMark-compliant and XSS-safe.
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What it does
One POST. Clean, ready-to-render HTML.
Standards-compliant output
Converts Markdown following the CommonMark spec — the same standard used by GitHub, GitLab, and Notion.
{
"markdown": "# Hello\n\n**Bold** and _italic_.",
"sanitize": false
}
Optional sanitization
Pass sanitize: true to strip unsafe tags like script and iframe before the HTML reaches your users.
{
"data": {
"html": "Hello
\nBold and italic.
"
}
}
Built for real use cases
Anywhere Markdown flows through your system, this API handles the conversion.
Documentation sites
Render README files and docs pages from Markdown stored in your database or CMS.
Rich-text editors
Accept Markdown input from users and return rendered HTML — no client-side parser needed.
Email content
Write email bodies in Markdown and convert to HTML before sending through your email provider.
AI-generated content
LLMs often return Markdown. Convert their output to HTML before rendering it in your app.
Static site generation
Build pipelines that convert Markdown content files to HTML at deploy time or on demand.
User-generated content
Let users format their posts with Markdown, and safely render the output with XSS sanitization.
Pair it with other APIs
Markdown to HTML works best as part of a content pipeline.
Markdown + Spell Check
Run spell check on the raw Markdown before converting — catch typos before they reach your readers.
Spell Check APIMarkdown + Profanity Filter
Filter offensive language from user-submitted Markdown before converting and storing the rendered HTML.
Profanity Filter APIMarkdown + Sentiment Analysis
Convert blog posts or reviews from Markdown to HTML, then score their sentiment to surface or route content automatically.
Sentiment Analysis APIFrequently Asked Questions
Convert Markdown at scale with Requiems.
One API key. Markdown to HTML, plus 50+ other APIs across text, networking, finance, and more.