About Markdown Preview

Live preview rendered Markdown with syntax highlighting. Part of the DevTools Surf developer suite. Browse more tools in the Text / String collection.

Use Cases

• Preview README files before pushing to GitHub
• Draft blog posts or docs with instant feedback
• Verify tables and code fences render correctly
• Test GFM syntax extensions before committing a docs change

Tips

• Supports GitHub-flavored Markdown
• Code blocks get syntax highlighting
• Tables, blockquotes, and task lists are supported

Fun Facts

• Markdown was created by John Gruber and Aaron Swartz in 2004. The original spec was intentionally minimal — less than 20 rules.
• There are over 30 distinct Markdown flavors in use today. CommonMark was created in 2014 to standardize the core syntax after years of fragmentation.
• GitHub processes over 2 billion Markdown files. Their flavor (GFM) added tables, task lists, and strikethrough — features missing from the original spec.

FAQ

What Markdown flavor does it support?

GitHub-Flavored Markdown (GFM): tables, task lists, strikethrough, auto-linked URLs, and code fences with language hints. CommonMark is the baseline.

Does it render code blocks with syntax highlighting?

Yes — most common languages (JS, TS, Python, Go, Rust, SQL, YAML, JSON, Shell) highlight automatically. Specify the language after ``` for best results.

Can I preview a README before pushing?

That's the primary use case. Paste the README.md and see exactly how GitHub will render it, without push-and-check cycles.

Does it support embedded HTML?

Yes — inline HTML passes through. Scripts are stripped for safety; style tags and most others render. Suitable for docs, not for fully interactive content.