Question 1

How do I preview Markdown in real time before publishing to GitHub or a blog?

Accepted Answer

Use a live Markdown preview tool like jslet's split-pane editor. Write or paste your Markdown on the left, and the rendered HTML preview updates in real time on the right — no refresh, no build step, no deployment. This instant feedback loop lets you catch formatting mistakes immediately: a missing space before a heading (# Heading, not #Heading), an unclosed code fence, or a broken table alignment row. The tool supports GitHub Flavored Markdown (GFM), the most widely-used Markdown dialect, meaning tables, task lists (- [ ] and - [x]), strikethrough (~~text~~), autolinks, and fenced code blocks with language-specific syntax highlighting all render correctly. Once you're satisfied with the output, you can copy the raw HTML with one click and paste it into a CMS, static site generator, email template, or anywhere that accepts HTML. Because the tool runs entirely in your browser, you can work offline and your document content never touches a server.

Question 2

What Markdown syntax does GitHub Flavored Markdown (GFM) support that standard Markdown doesn't?

Accepted Answer

GitHub Flavored Markdown (GFM) extends John Gruber's original Markdown with several features that have become de facto standards for technical writing. Tables: create column-aligned tables using pipes and dashes — | Header | Header | followed by | --- | --- | for alignment. Task lists: interactive checkboxes with - [ ] for unchecked and - [x] for checked items, used extensively in GitHub Issues and PR descriptions. Strikethrough: ~~text~~ renders as struck-through text, useful for showing edits or completed items. Autolinks: URLs like https://example.com are automatically converted to clickable links without needing [text](url) syntax. Fenced code blocks with language identifiers: triple backticks (```) with an optional language name (```javascript) enables syntax highlighting in the preview — jslet's preview highlights JS, Python, Go, JSON, CSS, HTML, Bash, SQL, and YAML. Disallowed raw HTML filtering: GFM sanitizes dangerous HTML like

Question 3

Can I write API documentation or README files in Markdown and see the HTML output?

Accepted Answer

Yes, Markdown is the standard format for API documentation and README files across GitHub, GitLab, npm, PyPI, and most developer platforms. You can write your entire README.md, API doc, or technical spec in Markdown and use jslet's live preview to see exactly how it will render once pushed to your repository. The preview shows: headings with proper hierarchy (the first # H1 becomes the page title), syntax-highlighted code blocks for your API examples (```json, ```curl, ```javascript), tables for parameter documentation and response schemas, task lists for installation checklists, and linked table of contents entries. A practical workflow: write your Markdown in the left pane, verify the rendered output on the right, then copy-paste the Markdown source into your README.md or documentation file. The split-pane design lets you see both source and output simultaneously, which is especially valuable when debugging complex tables with pipe alignment or nested lists where the raw Markdown is hard to parse visually. For large documents, use the 'Copy HTML' button to export the rendered HTML for use in non-Markdown environments like Confluence or email.

Markdown Live Preview

🟢📤 Preview

🟢📖 What's Supported in This Markdown Renderer