Question 1

What is an HTML sanitizer and why do I need it?

Accepted Answer

An HTML sanitizer is a security tool that parses raw code to remove dangerous elements like script tags or event handlers. You need it to prevent Cross-Site Scripting (XSS) attacks, ensuring that user-submitted content cannot execute malicious scripts in a visitor's browser or compromise your web application’s security.

Question 2

How does the online XSS filter protect my website?

Accepted Answer

This online filter works by inspecting your HTML against a whitelist of safe tags and attributes. It automatically strips out high-risk elements such as iframe, object, and any inline JavaScript like onclick. By neutralizing these vectors, it ensures that only safe, formatted text is rendered on your site.

Question 3

Can I use this tool to sanitize user comments?

Accepted Answer

Yes, this tool is ideal for developers needing to sanitize user-generated comments. By processing input through our filter, you remove potential injection points while maintaining allowed formatting. It is a crucial step for any platform that displays community content to prevent attackers from hijacking user sessions via scripts.

Question 4

Is it safe to paste my sensitive code into this sanitizer?

Accepted Answer

Our HTML sanitizer processes your code entirely in the browser or via secure, non-logging sessions. No code is stored on our servers, making it a safe choice for testing snippets. However, always ensure you are using a secure HTTPS connection when performing security-sensitive tasks on any online tool.

Question 5

Which HTML tags are considered dangerous for XSS?

Accepted Answer

Dangerous tags include script, iframe, object, embed, and applet, as they can load or execute external code. Additionally, attributes like 'onerror', 'onload', and 'javascript:' links are high-risk. Our sanitizer identifies these common attack vectors and removes them instantly to keep your rendering environment secure and stable.

Question 6

What happens if the sanitizer removes code I want to keep?

Accepted Answer

The sanitizer follows strict security protocols to prioritize safety over flexibility. If it removes code you need, check if you are using unsafe attributes or tags. For advanced developers, we recommend using a whitelist approach where only specific, known-safe HTML elements are permitted while everything else is discarded.

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Technical Specification: HTML Sanitizer (XSS filter)

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Reviews & Discussions

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Technical Specification: HTML Sanitizer (XSS filter)

Capabilities: