Markdown to HTML & PDF Exporter — Live Previewer & Sanitizer

Markdown is a lightweight markup language created by John Gruber in 2004 to allow authors to write formatted text using an easy-to-read, plain-text syntax. GitHub Flavored Markdown (GFM) extends CommonMark with syntax for tables, task checklists, strikethrough formatting, and autolinks, making it the de-facto standard for software documentation.

Rendering user-supplied Markdown directly into web pages poses significant security risks if HTML tags are not sanitized. Attackers frequently inject malicious <script> tags, inline event handlers (such as onerror or onload attributes), and pseudo-protocol links (javascript: URLs). OmniTools passes all generated markup through a strict multi-pass Anti-XSS sanitizer that strips executable tags while preserving safe typographical elements.

Exporting web documents to PDF often results in broken page breaks, missing syntax borders, or awkward navigation clutter. OmniTools embeds targeted @media print CSS rules that hide all portal headers, interactive toolbars, and display ad slots. Only your formatted document is printed with crisp typography, A4 page margins, and preserved code syntax.

All rendering and sanitization execute 100% inside your browser memory. Your confidential draft articles, internal company memos, and proprietary API specs are never stored or transmitted across external networks.