CSP Evaluator

by ise-seam-core@google.com · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

CSP Evaluator is a tool that allows developers to check if a Content Security Policy (CSP) serves as mitigation against XSS attacks.

Users

30K

+10K in 30 days

Rating

3.1 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#4,933

#4,285 among extensions

Version

0.3.3

updated 4 Apr 2025

Users

monthly, 3 years

Latest, 15 Oct 2026: 30,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 34 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About CSP Evaluator

CSP Evaluator is a small tool that allows developers and security experts to check if a Content Security Policy (CSP) serves as a strong mitigation against cross-site scripting attacks. Reviewing CSP policies is usually a very manual process and most developers are not aware of CSP bypasses. CSP Evaluator checks are based on a large-scale empirical study and are aimed to help developers to harden their CSP. This tool is provided only for the convenience of developers and Google provides no guarantees or warranties for this tool.