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Markdown Editor

Write Markdown with a live, sanitised preview.

Use the Markdown Editor tool

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What this markdown editor does

Markdown Editor gives you a source pane and a rendered preview side by side. The renderer supports headings, paragraphs, bold and italic text, inline and fenced code, block quotes, ordered and unordered lists, links and images.

Security is deliberate: raw HTML in the source is escaped rather than executed, and links are limited to http, https, mailto, tel and relative paths. A pasted snippet cannot run JavaScript in the preview, which is the failure mode of naive Markdown previewers.

Why use it

  • Draft a README or documentation page before committing it.
  • Check how a Markdown snippet renders without installing an editor.
  • Paste untrusted Markdown and view it without risking script execution.

How to use it

  1. 1Write or paste Markdown in the source pane.
  2. 2Read the preview as you type.
  3. 3Copy the Markdown, download it, or check the rendered result.

Worked examples

Heading and list

Input

# Title

- one
- two

Output

An h1 heading followed by a two-item bullet list.

Code block

Input

```js
console.log('hi')
```

Output

A fenced code block with the language label preserved.

Common mistakes

  • Forgetting the blank line before a list, which makes some parsers treat it as a paragraph.
  • Using four-space indentation for code when list context turns it into a nested item.
  • Pasting HTML expecting it to render; it is shown as escaped text by design.

Frequently asked questions

Which Markdown flavour is supported?
A common subset used by README files and most documentation tools. Syntax specific to one vendor may not render.
Why is my HTML tag visible?
Raw HTML is escaped on purpose so a shared snippet cannot inject scripts into the preview.
Can I export to HTML?
The preview is the rendered HTML. Use your editor's save-as or copy the source into your static site generator for a full export.
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