Markdown Previewer

What It Supports

The previewer supports common Markdown syntax such as headings, paragraphs, bold, italic, links, images, lists, blockquotes, horizontal rules, and code blocks. GFM mode adds tables, task lists, strikethrough, and fenced code blocks.

What It Does Not Include

The current preview does not include syntax highlighting, Mermaid diagram rendering, LaTeX/math rendering, heading anchor generation, table-of-contents generation, file upload, export, or copy buttons. It is a focused live preview surface.

Security Note

Markdown can contain raw HTML. The preview applies basic sanitization to remove script, iframe, object, embed, event-handler attributes, and javascript: URLs before rendering. Treat this as a preview aid, not a production HTML sanitizer.

README Review Checklist

• Check heading hierarchy and spacing.
• Check table columns and separators.
• Check task-list formatting.
• Check image and link URLs after moving content to a repository.
• Check fenced code blocks have the intended language label, even without syntax highlighting here.