Markdown ↔ HTML Converter
Convert Markdown to HTML and HTML to Markdown bidirectionally with GitHub-Flavored Markdown support
Interactive tool
Input
No data to convert
Paste Markdown or HTML. Direction auto-detected based on input
What is a Markdown to HTML Converter?
A bidirectional converter that turns Markdown into clean HTML for the web, and HTML back into Markdown for documentation and version control. Supports GitHub-Flavored Markdown including tables, task lists, fenced code blocks, and strikethrough.
How to Use This Markdown to HTML Converter
- 1Paste Markdown or HTML into the input area
- 2Leave Auto-detect on or pick the direction explicitly
- 3Toggle GFM and soft line breaks for Markdown rendering
- 4Review output and use the live preview when converting to HTML
- 5Copy or download the result
Key features
Bidirectional Conversion
Markdown → HTML and HTML → Markdown in the same tool
GitHub-Flavored Markdown
Tables, task lists, fenced code blocks, autolinks, and strikethrough are all supported
Auto-Detection
Direction is detected from input shape so you rarely choose manually
Live HTML Preview
See the rendered HTML right next to the source to confirm formatting
Round-Trip Verification
Click "Use as input" to convert the output back and confirm fidelity
Configurable Output
Toggle GFM and soft line breaks to match your downstream renderer
Size Comparison
Byte counts make it easy to see the format change impact
100% Private
Conversion runs in your browser. Nothing is uploaded
Why Convert Between Markdown and HTML?
Markdown is the standard for documentation, README files, and content authoring; HTML is what browsers render. Converting between them lets you publish Markdown as web pages, or reverse-engineer HTML emails and articles into Markdown for editing and version control.
Common use cases
- Publishing Markdown documentation as static HTML
- Migrating legacy HTML content into Markdown for Git-based workflows
- Generating clean HTML for newsletters and emails from Markdown
- Preparing README content for systems that only render HTML
- Converting blog posts between authoring and publishing formats
- Auditing Markdown by reviewing the rendered HTML
- Round-tripping content between CMS systems with different format support
- Cleaning HTML pasted from rich-text editors back into portable Markdown
GitHub-Flavored Markdown
GFM extends standard Markdown with tables, task lists, fenced code blocks with language hints, autolinks, strikethrough with double tildes, and more. Toggle GFM off to use strict CommonMark rendering instead.
HTML to Markdown Limitations
HTML can express formatting Markdown cannot. Inline styles, custom classes, and complex nested layouts may simplify or drop during conversion. Round-trip is reliable for clean, semantic HTML but not for visually styled documents.
Tips & best practices
Round-trip your content
Use the "Use as input" button to convert output back. Identical results confirm a clean round-trip
Stick with auto-detect
Auto-detect is reliable for typical inputs. Override only for testing edge cases
Use GFM when targeting GitHub
GFM extensions match what GitHub renders. Keep it on for READMEs, issues, and pull requests
Watch byte size
HTML is usually larger than Markdown for the same content. Use byte counts to plan storage and transmission
Validate before converting
If conversion produces unexpected results, check input for typos or unclosed tags first
Privacy & security
This Markdown to HTML converter runs entirely in your web browser using the marked and turndown libraries. Data is never uploaded to any server, stored anywhere, or transmitted. All conversion happens locally on your device.
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Utilities
Frequently Asked Questions
Is my data sent to any server?
No. The converter runs entirely in your browser using the marked and turndown libraries. Data is never uploaded, stored, or transmitted to any server.
Does it support GitHub-Flavored Markdown?
Yes. GFM extensions including tables, task lists, fenced code blocks, autolinks, and strikethrough are supported. Toggle GFM off for strict CommonMark rendering.
Why does HTML to Markdown sometimes lose styling?
Markdown is intentionally limited to portable, readable formatting. Inline styles, custom classes, and complex nested layouts cannot be expressed in Markdown so they simplify or drop during conversion.
Can I round-trip content between formats?
Yes for clean, semantic content. Use the "Use as input" button to convert output back. Round-trip is reliable for typical Markdown but visually styled HTML may not survive the trip exactly.
What does the soft line breaks toggle do?
When on, single newlines in Markdown become <br> tags in HTML. When off, only blank lines start a new paragraph. Match this to your renderer expectation.
Can I preview the rendered HTML?
Yes. After converting Markdown to HTML, a live preview shows below the source so you can confirm formatting before copying or downloading.