Website defence · Local browser tool
CORS Policy Analyzer
Inspect pasted CORS response headers and flag combinations that are invalid or unnecessarily broad.
Use the tool
Enter only data you are authorised to inspect. The result is a focused technical check, not a certification or full vulnerability assessment.
What it checks
Clear scope. Reproducible output.
- Allowed origin and credentials interaction
- Methods, exposed headers and preflight age
- Context-aware limitations on origin reflection
Questions
Does CORS Policy Analyzer upload my input?
No. The working tool runs in the current browser tab. Avoid browser extensions or shared devices when handling sensitive material.
Does a passing result prove my system is secure?
No. It proves only the checks described on this page against the input you supplied. Server behaviour, business logic and runtime vulnerabilities require separate authorised testing.
Why is the result different from a live scanner?
This tool analyses pasted or local data. A live scanner observes network responses, DNS, TLS and redirects, so its evidence and scope are different.