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WAF Detector Online Free

Inspect public HTTP headers and cookie profiles to find active Web Application Firewalls. Detect configurations matching Cloudflare, AWS WAF, Sucuri, and similar services.

✓ Free security tool✓ No signup required✓ Fast results✓ Browser-based utility✓ Mobile friendly
🔒Privacy Note: This tool may contact external data sources or the domain, IP or URL you enter to complete the requested check.
⚠️Note: WAF detection checks standard HTTP response signatures. Firewalls that hide header stamps or route over custom CDN gateways may not flag active status.
Security Tools
WAF Detector
🔥

WAF Detector

Detect common Web Application Firewall signals such as Cloudflare, AWS WAF, Sucuri and similar services.

Website URL
⚠️ Browser CORS limits WAF detection. For full fingerprinting use wafw00f.
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Instructions

How to Use This Tool

1

Enter Domain URL

Type the target website URL (e.g. http://mywebsite.com) into the lookup checker.

2

Perform WAF Query

Click the Scan button to fetch the public HTTP headers.

3

Analyze Header Stamps

Inspect specific cookie names (e.g. __cfuid) or server headers indicating firewall routes.

4

Identify Provider

Review identified firewall systems and check if protections are properly active.

Example

Verifying active CDN firewall protections

You have configured Cloudflare protection on your web application. Paste your URL into the detector to verify that the query successfully detects 'Cloudflare WAF' signatures, confirming that traffic is routing through proxy filters.

Applications

Common Use Cases

Security Audits

Verify that firewalls are active and correctly intercepting external requests.

Infrastructure Checks

Identify active firewall providers on client websites during infrastructure setup.

DevOps Validation

Confirm CDN and security settings match staging policies before DNS updates.

Security Education

Learn about HTTP response headers, cookies, and reverse proxy network paths.

Related Utilities

Related Security Tools

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Inspect website SSL and chain status.

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Verify links against threat databases.

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Check links for deceptive domains.

DNS Security Lookup

Lookup domain SPF and security records.

Questions

Frequently Asked Questions

What is a WAF?
A Web Application Firewall (WAF) acts as a security filter between a web application and the internet, inspecting HTTP traffic to block SQL injection, cross-site scripting (XSS), and bot traffic.
Can this tool identify all WAFs?
No. Custom firewall systems or proxies that redact default header stamps (like Cloudflare or Sucuri indicators) may pass undetected. The tool checks header signals and cookies.
Does this tool upload my target URL details?
Yes. This is a network lookup utility. The target URL is queried over the internet to fetch header fields and server cookie parameters.
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