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Free Markdown to HTML API - Convert Markdown to HTML Instantly
Markdown is great for writing, but browsers need HTML. Converting Markdown to HTML locally requires libraries (different per language). Handling edge cases (tables, code blocks, special characters) is tedious. What if you could convert Markdown to HTML via REST API without dependencies?
The Markdown to HTML API converts Markdown to clean, valid HTML instantly. Supports: GitHub Flavored Markdown (GFM), tables, code blocks with syntax highlighting, task lists, strikethrough, safe HTML escaping. Perfect for blog platforms, documentation sites, CMS systems, content preview, and static site generation.
Why Use This API?
Markdown conversion matters:
- Content Platforms – Display Markdown as rendered HTML
- Documentation – Convert docs to static HTML
- Blogs – Preview Markdown before publishing
- Email – Render Markdown for email campaigns
- Comments – Allow users to write Markdown comments
- Static Sites – Build blogs from Markdown files
Quick Example - cURL
# Convert Markdown to HTML
curl -X POST "https://markdown-to-html-api.p.rapidapi.com/convert" \
-H "X-RapidAPI-Key: YOUR_KEY" \
-H "X-RapidAPI-Host: markdown-to-html-api.p.rapidapi.com" \
-H "Content-Type: application/json" \
-d '{"markdown": "# Hello\n\nThis is **bold** and *italic*."}'
Response:
{
"success": true,
"markdown": "# Hello\n\nThis is **bold** and *italic*.",
"html": "<h1>Hello</h1>\n<p>This is <strong>bold</strong> and <em>italic</em>.</p>",
"safe": true,
"length": 89
}
Python Example
import requests
url = "https://markdown-to-html-api.p.rapidapi.com/convert"
headers = {
"X-RapidAPI-Key": "YOUR_API_KEY",
"X-RapidAPI-Host": "markdown-to-html-api.p.rapidapi.com",
"Content-Type": "application/json"
}
# Convert blog post Markdown to HTML
blog_markdown = """
# Getting Started with APIs
## What is an API?
An API is a set of **rules and protocols** for building software.
### Key Features:
- Easy to integrate
- Well documented
- Secure authentication
\`\`\`python
import requests
response = requests.get("https://api.example.com/data")
\`\`\`
See our [documentation](https://docs.example.com) for more.
"""
payload = {"markdown": blog_markdown, "github_flavored": True}
response = requests.post(url, json=payload, headers=headers)
data = response.json()
# Use HTML in blog display
blog_html = data["html"]
print(blog_html)
JavaScript / Node.js Example
const axios = require("axios");
const markdownToHTML = async (markdown, useGFM = true) => {
const response = await axios.post(
"https://markdown-to-html-api.p.rapidapi.com/convert",
{
markdown,
github_flavored: useGFM,
sanitize: true // Remove potentially unsafe HTML
},
{
headers: {
"X-RapidAPI-Key": process.env.RAPIDAPI_KEY,
"X-RapidAPI-Host": "markdown-to-html-api.p.rapidapi.com"
}
}
);
return response.data.html;
};
// Blog post rendering
const renderBlogPost = async (markdown) => {
const html = await markdownToHTML(markdown);
return `
<article class="blog-post">
${html}
</article>
`;
};
// Export to static HTML
const staticHTML = await renderBlogPost(blogMarkdown);
fs.writeFileSync("post.html", staticHTML);
Supported Markdown Features
| Feature | Markdown | HTML |
|---|---|---|
| Headings |
# H1, ## H2
|
<h1>, <h2>
|
| Bold | **bold** |
<strong>bold</strong> |
| Italic | *italic* |
<em>italic</em> |
| Links | [text](url) |
<a href="url">text</a> |
| Images |  |
<img src="url" alt="alt"> |
| Lists | - item |
<ul><li> |
| Code | `code` |
<code>code</code> |
| Code Block |
python code |
<pre><code> |
| Tables | Pipe-delimited | <table> |
| Strikethrough | ~~text~~ |
<s>text</s> |
| Task Lists | - [ ] Task |
Styled checkboxes |
Real-World Use Cases
1. Blog Platform with Markdown Editor
Allow authors to write in Markdown, display as HTML.
def save_blog_post(title, markdown_content):
html_content = markdown_to_html(markdown_content)
post = BlogPost(
title=title,
markdown=markdown_content,
html=html_content,
published_at=datetime.now()
)
db.save(post)
return post
2. Documentation Generator
Convert Markdown docs to static HTML.
def generate_docs():
doc_files = glob.glob("docs/**/*.md")
for doc_path in doc_files:
with open(doc_path) as f:
markdown = f.read()
html = markdown_to_html(markdown)
output_path = doc_path.replace(".md", ".html")
with open(output_path, "w") as f:
f.write(f"<html><body>{html}</body></html>")
3. User Comments with Markdown
Allow users to write comments in Markdown.
def post_comment(user_id, post_id, markdown_content):
html_content = markdown_to_html(markdown_content, sanitize=True)
comment = Comment(
user_id=user_id,
post_id=post_id,
markdown=markdown_content,
html=html_content
)
db.save(comment)
4. Email Newsletters
Convert newsletter Markdown to HTML for email.
def send_newsletter(markdown_content):
html = markdown_to_html(markdown_content)
email_body = f"""
<html>
<body style="font-family: sans-serif;">
{html}
</body>
</html>
"""
send_email(to=subscribers, body=email_body, is_html=True)
5. API Documentation Preview
Preview API docs written in Markdown.
// Show live preview as user types
const previewMarkdown = async (markdown) => {
const html = await markdownToHTML(markdown);
document.getElementById("preview").innerHTML = html;
};
// Update preview on keystroke
textEditor.addEventListener("input", (e) => {
previewMarkdown(e.target.value);
});
6. README Rendering
Display project READMEs on web pages.
def get_project_readme(project_id):
project = db.projects.get(project_id)
html = markdown_to_html(project.readme_markdown)
return {
"name": project.name,
"readme_html": html,
"url": f"/projects/{project_id}"
}
Markdown Examples
Lists
- Unordered list item 1
- Unordered list item 2
1. Ordered item 1
2. Ordered item 2
Code Block
\`\`\`python
def hello():
print("Hello, World!")
\`\`\`
Table
| Feature | Supported | Status |
|---------|-----------|--------|
| Tables | Yes | ✓ |
| Code | Yes | ✓ |
Pricing
| Plan | Cost | Requests/Month | Best For |
|---|---|---|---|
| Free | $0 | 500 | Blogs, documentation |
| Pro | $5.99 | 50,000 | Content platforms |
| Ultra | $14.99 | 500,000 | High-volume conversion |
Related APIs
- Text Analysis API – Analyze converted content
- Readability Score API – Check HTML readability
- String Utilities API – Post-process HTML
- CSS Minifier API – Minify embedded styles
Get Started Now
Convert Markdown free on RapidAPI
No credit card. 500 free requests to convert Markdown to HTML.
Running a Markdown-based blog? Share your setup in the comments!
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