Xss Generator
A new tool extracted from the codebase.
Last reviewed by the Radiatus Cloud team
XSS Payload Generator
Generate Cross-Site Scripting (XSS) vectors to test input sanitization and Content Security Policy.
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Test your own application for cross-site scripting (XSS)
Testing whether your own application is vulnerable to cross-site scripting (XSS) is part of securing it, and doing so requires understanding the vulnerability class. This tool helps you generate test cases for cross-site scripting (XSS) so you can check your own application, under authorisation, and confirm that your defences hold. The test cases help you verify that your application properly encodes output so that user input cannot execute as script in a visitor’s browser.
Why this vulnerability matters
Cross-site scripting occurs when an application includes untrusted input in a page without proper encoding, so the input runs as script in other users’ browsers. It can steal sessions or act as the user. It appears in the OWASP Top Ten precisely because it is common and serious, which is why testing for it against your own applications, and understanding how it works, is essential to defending against it.
The defence, and responsible use
The defence is to encode output for its context, so input is displayed as text rather than executed, and to use a Content Security Policy as a second layer. Testing confirms your encoding is complete. This tool is for authorised security testing of systems you own or have explicit permission to test, for security research, and for education, testing without authorisation is illegal and unethical. It runs entirely in your browser, so nothing you enter is uploaded.
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Frequently Asked Questions
How do I prevent XSS?
By encoding output for the context it appears in, so untrusted input is rendered as text not executed, and using a Content Security Policy as a second layer.
What does the test verify?
That your application encodes output properly so user input cannot execute as script in a visitor’s browser.
Is this for attacking other people’s systems?
No. It is for authorised testing of systems you own or have explicit permission to test, and for security education. Unauthorised testing is illegal.
Is my input uploaded?
No. It runs entirely in your browser.
Privacy & Security
Processed locally.
About This Tool
This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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