Preview Markdown as Rendered HTML While You Write
Markdown is the plain-text format behind README files, documentation, forum posts, and notes apps, but its syntax only reveals its value when you see the rendered result. A missing closing asterisk or a mistyped link turns clean formatting into a wall of raw symbols, and guessing what the final page will look like slows down every writer and developer. The Markdown Preview tool renders your source as HTML in real time, so headings, bold text, lists, and code blocks appear exactly as readers will see them. Technical writers documenting APIs, developers maintaining project READMEs, and bloggers drafting in plain text all need a preview pane to catch errors before content ships. The feedback loop is immediate: edit the source on the left, and the rendered page on the right follows every keystroke, which makes the tool just as useful for learning the syntax as for polishing finished work.
How to Preview Markdown
- Open the Markdown Preview tool and place the cursor in the editor pane.
- Type or paste Markdown source, such as
# Headingor**bold**. - Watch the preview pane re-render on every change, with no save or refresh required.
- Toggle between edit and preview modes if a side-by-side layout is not available.
- Copy the rendered HTML if you need to embed the result in a page.
Common Syntax at a Glance
These five patterns cover the majority of everyday Markdown. Learning them makes the preview feel predictable rather than magical. Once the basics feel natural, the rendered pane becomes a safety net: it confirms that the exact formatting readers will see matches what you intended, so documentation reaches the repository already polished. Elements like blockquotes and horizontal rules are equally simple to verify by typing them once and watching the result appear.
| Markdown input | Rendered output |
|---|---|
## Subheading | An h2 heading |
**important** | important |
- first | A bullet list item |
[site](https://example.com) | A clickable link |
`inline code` | Monospaced inline code |
Tips for Clean Markdown
- Keep a blank line before lists — most renderers need a blank line to start a list reliably.
- Close inline code properly — a stray backtick turns the rest of the paragraph into code styling.
- Escape literal symbols — write
©instead of the raw entity when you want it shown as text. - Use the preview for links — verify URLs work by clicking them in the rendered pane before publishing.
When to Use This Tool
- README authoring — check that headings and code fences render before pushing to a repository.
- Documentation review — confirm tables and lists look right on the page, not just in the source.
- Forum and blog drafts — preview formatting before pasting into a CMS or comment system.
- Learning the syntax — experiment with unfamiliar elements and see their effect immediately.
Frequently Asked Questions
Is the preview generated locally in my browser?
Yes, all rendering happens client-side, so your Markdown source is never transmitted to a server and nothing is stored.
Does the tool support GitHub Flavored Markdown?
It supports the core CommonMark elements plus common extensions such as tables, task lists, and fenced code blocks, which covers nearly all GitHub README formatting.
Can I see the raw HTML that the preview produces?
Yes, the tool can expose the generated HTML so you can copy it into a page or inspect exactly what changed.
Why does my table not render?
Tables require a header row separated by a row of dashes, like | a | b | followed by | --- | --- |. Without the separator row, most renderers treat the text as a paragraph.
How do I show an asterisk or underscore as a literal character?
Escape it with a backslash: \*not italic\* renders as literal asterisks instead of starting emphasis.
Does the preview support images?
Yes, standard image syntax such as  renders the image inline in the preview pane.
Is there a word or character count in the editor?
The tool focuses on rendering, but you can pair it with the Text Counter to track lengths while you draft documentation.
What happens if I paste HTML directly into the editor?
Raw HTML in Markdown is passed through and rendered by most parsers, so pasted HTML appears in the preview rather than as escaped text.