Overview
The sanitize_html package is a Dart utility designed to securely sanitize HTML content by filtering out potentially dangerous elements and attributes, preventing XSS attacks. It allows developers to define a safe subset of HTML tags and attributes, ensuring only trusted content is rendered. Ideal for applications that process user-generated content, it supports all major platforms including web, mobile, and desktop. The package is maintained by Google and integrates seamlessly with Flutter projects.
Use cases
- Processing user-generated content
- Rendering rich text safely
- Preventing XSS in web views
- Securing form inputs
- Displaying markdown or HTML from untrusted sources
Key features
- Safe HTML filtering
- Customizable allowed tags and attributes
- Cross-platform support
- Lightweight and efficient
- Maintained by Google
Suitable for
- Web and mobile apps with user input
- Content management systems
- Chat or comment sections
- Educational platforms
- Secure document rendering
Considerations
- Requires defining safe rules explicitly
- May strip desired formatting if overly restrictive
- Not suitable for full HTML transformation
- Performance impact with large HTML strings
- Limited to sanitization, not parsing or rendering