What security threats does the sanitizer prevent?

The sanitizer removes XSS attack vectors including script tags, inline event handlers (onclick, onerror, onload), javascript: URLs, malicious iframes, object/embed elements, form injection, and CSS-based attacks via style attributes.

DOMPurify is the industry-standard, widely trusted JavaScript library for HTML sanitization. It's used by millions of websites and applications to prevent XSS attacks while allowing safe HTML content.

What's the difference between the sanitization modes?

Strip All HTML removes every HTML tag leaving only text. Allow Safe HTML preserves safe formatting tags (b, i, a, img, etc.) while removing dangerous ones (script, iframe, form). Safe HTML mode is recommended for most use cases.

Does the sanitizer affect markdown syntax?

No, the sanitizer only targets HTML elements within the markdown. Standard markdown syntax like headers, bold, italic, links, and code blocks are preserved. Only embedded HTML is processed.

Is my content private during sanitization?

Yes, all sanitization happens entirely in your browser using DOMPurify. No content is sent to any server, ensuring complete privacy.

Markdown Sanitizer

Remove potentially dangerous HTML from Markdown content. Strip XSS attack vectors, malicious scripts, and unsafe elements while preserving safe formatting. Powered by DOMPurify.

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Quick Presets

Sample markdown with potentially malicious HTML

Input

Paste markdown that may contain unsafe HTML

Strip all HTML

Allow safe HTML (recommended)

Remove inline styles

How it works: Removes potentially dangerous HTML from markdown content. Strips script tags, event handlers (onclick, onerror), iframes, and other XSS attack vectors while preserving safe formatting. Powered by DOMPurify.

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