How to use Markdown Previewer
- Type Markdown or load the example document.
- Watch the preview update after a short pause in typing.
- Copy the original Markdown or download a .md file to use elsewhere.
A closer look
Markdown adds structure to plain text with lightweight punctuation. A leading # creates a heading, **double asterisks** create bold text, and fenced blocks preserve code formatting. This preview supports common Markdown plus tables through Marked’s GitHub-flavored mode. Generated HTML passes through DOMPurify with a small formatting allowlist, then renders in a preview restricted to those sanitized formatting elements. Scripts, event handlers, styles, embedded pages, and images cannot become active preview content. The original Markdown remains available unchanged for download.
A practical example
Type ## Notes followed by **Important** to preview a heading and bold text. Raw unsafe HTML is removed; the source download remains your Markdown text.
A useful tip
External images are intentionally omitted so previewing a document does not fetch its resources. Code blocks are displayed as text rather than executed, and no large syntax-highlighting editor is loaded.
Good questions. Simple answers.
Will it look identical on every Markdown platform?
No. Platforms may use different extensions, styles, or HTML policies. This is a local common-Markdown preview, not a promise of identical rendering everywhere.
Does downloading remove unsafe text from my Markdown?
No. The preview is sanitized; the .md download preserves your source. Treat that source appropriately before rendering it in another application.
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