Web Security Scanner
Know Your Attack Surface.
Instant security audit — headers, TLS, DNS, cookies. Free scan, no login.
Scan a website →Trusted by security professionals worldwide.
Free Tools
Everything free, no login required
How it works
Three steps to a full audit
01
Paste a URL
Enter any website — no account, no setup, no API key needed for the free scan. Works on any publicly accessible URL including staging and production environments.
02
We scan 20+ checks
Headers, TLS certificate, DNS records, cookie security — all in parallel, in seconds. We use a real HTTP request with browser-like headers to get the same response your visitors see, not a cached snapshot.
03
Get instant results
Letter grade, per-finding fixes, and an exportable PDF report (Pro) ready to hand to a client. Each finding includes the exact header value to add, so fixes take minutes rather than hours of research.
The case for checking
Why HTTP security headers matter
HTTP security headers are the first line of defence browsers enforce before any code runs on your page. A properly configured Content Security Policy (CSP) blocks cross-site scripting (XSS) at the browser level. HSTS forces every connection to use HTTPS, eliminating protocol-downgrade attacks. X-Frame-Options stops your pages being embedded in phishing iframes. Despite being a few lines of server configuration, most websites are missing two or more of these controls. A free website security scan with WebAudit tells you exactly which headers are absent and what to add.
What we check
Full coverage. Zero noise.
8 CHECKS
HTTP Security Headers
CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, CORS policy, server fingerprinting. Each missing or misconfigured header is a potential attack vector. A missing Content Security Policy leaves your site open to cross-site scripting; missing HSTS lets attackers downgrade connections to plain HTTP and intercept sensitive data.
5 CHECKS
TLS / SSL Certificate
Certificate expiry, days remaining, cipher strength, protocol version (TLSv1.0 is deprecated), and self-signed detection. An expired certificate triggers browser warnings that drive visitors away instantly. Weak cipher suites or old protocol versions can expose encrypted traffic to well-known downgrade attacks.
7 CHECKS
DNS Security
SPF, DMARC, DKIM detection, CAA records, DNSSEC, and security.txt — plus policy strength analysis. Without SPF and DMARC, anyone can send convincing phishing emails that appear to come from your domain. WebAudit checks record values, not just presence — a DMARC "p=none" policy is flagged as weak.
3 FLAGS/COOKIE
Cookie Security
Secure flag, HttpOnly flag, SameSite attribute — checked on every cookie set by the page. A cookie without the Secure flag can be intercepted over plain HTTP; without HttpOnly, any XSS flaw gives attackers direct access to session tokens. WebAudit reports each cookie by name so you know exactly which ones to fix.
3 CHECKS
Cross-Origin Isolation
COOP, COEP, CORP — modern headers that isolate your browsing context and prevent cross-origin data leaks and Spectre-style attacks. These headers are required to safely use high-resolution timers and SharedArrayBuffers. Many developers overlook them entirely; WebAudit checks all three and explains the impact of each.
4 CHECKS
Page Analysis
Mixed content detection, Subresource Integrity (SRI) checks, base tag hijacking risk, external dependency audit. Mixed content means your HTTPS page loads resources over plain HTTP, silently breaking security guarantees. Missing SRI attributes allow CDN-served scripts to be replaced with malicious versions without detection.
Why WebAudit
Built for the way you actually work.
100% free scan
No account required. Paste a URL, get results instantly. SecurityHeaders.com shut down its API in April 2026 — WebAudit stepped in with more checks, no login wall, and INR pricing for Indian developers.
PDF report (Pro)
Client-ready PDF export with executive summary, per-finding severity, and fix recommendations grouped by effort — something your client can actually read and act on. Pro plan includes 50 PDF exports per month.
API access from ₹499/month
INR pricing for India via Razorpay. International payments via LemonSqueezy at $7/month. Automate security checks in your CI pipeline or build your own reporting dashboard on top of the WebAudit API.
Who uses WebAudit
Built for anyone responsible for a site's security
Freelance pentesters use the PDF export to deliver professional client reports without building their own tooling. Developers run scans in CI to catch regressions before they ship. Digital agencies run scheduled scans across all their client domains. Site owners who are not security experts get plain-English explanations of every finding and exactly what needs to change — no background in security required to act on the results.
Compliance
Know your compliance posture.
OWASP Top 10 · PCI-DSS v4.0 · GDPR Article 32 · ISO 27001:2022 — all mapped automatically in one PDF report.
Get report for ₹249 / $3 →