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Free ImmuniWeb Alternative

ImmuniWeb Alternative — Free Website Security Scanner

Headers, CSP, TLS certificates, cipher suites, DNSSEC and email authentication — 62 checks in a single scan, each failure with a concrete fix instead of just a grade. No account needed to see your report.

Results in 1–3 minutes62 checks in one run

Results in 1–3 minutes · Free · No signup required

One Scan Instead of Four Separate Tests

ImmuniWeb's free community tests are split by target: one for website security, another for SSL, another for your domain and email. Each gives you a separate report to reconcile by hand.

Everything in one report

A single scan returns your headers, TLS configuration, DNS and email authentication, and content findings together — with one score and one ordered list of what to fix first. No stitching three reports together to find out whether your site is actually in good shape.

A fix, not just a grade

Every failed check comes with the specific change to make — the header value, the cipher list, the DNS record — and a per-check explainer page. The report is meant to be actioned by whoever runs the server, not interpreted by a security specialist.

SecScanner vs ImmuniWeb Free Website Security Test

Scoped to ImmuniWeb's free website security test as described on its own page. Rows we could not verify from a published source — usage limits, pricing, result visibility — are left out rather than guessed.

SecScanner vs ImmuniWeb Free Website Security Test: feature comparison across SecScanner, ImmuniWeb (free test)
FeatureSecScannerImmuniWeb (free test)
HTTP security & privacy headersSupportedSupported
Content Security Policy (CSP) analysisSupportedSupported
DNSSEC configurationSupportedSupported
GDPR & PCI DSS compliance mappingSupportedSupported
Web vulnerability scanSupportedSupported
API access for CI/CDSupportedSupported
AI bot protection testNot supportedSupported
TLS/SSL certificate & cipher audit in the same scanSupportedNot supported
SPF, DKIM & DMARC email security in the same scanSupportedNot supported
First scan with no accountSupportedNot supported

The ImmuniWeb column reflects the check list published on immuniweb.com/websec/ as of 30 July 2026, covering its free website security test only. ImmuniWeb offers separate free tests for SSL and for domain/email security; those are not included in this column, which is why the TLS and email rows are marked as not covered in the same scan. Vendor features change — check their site for current details.

What SecScanner Checks

62 checks across four categories — click any one for the full explainer and fix instructions.

HTTP Security Headers

23 header checks — CSP, HSTS, frame policy, Referrer-Policy, Permissions-Policy, cookie flags, CORS, and the Cross-Origin isolation trio (COOP, COEP, CORP).

TLS & Certificate Audit

Certificate expiry and chain trust, TLS 1.2/1.3 support, deprecated TLS 1.0/1.1 detection, cipher suite strength, OCSP stapling — in the same scan, not a separate tool.

Email & DNS Security

SPF, DKIM, DMARC, DNSSEC, CAA, DANE, MTA-STS and BIMI. Spoofable email is a security hole most website scanners never look at.

Vulnerable JavaScript Libraries

Detects front-end libraries with known CVEs still shipping in your pages, with the version found and the version to upgrade to.

Exposed Files & Secrets

Looks for .env files, .git directories, database dumps, source maps, admin panels and hard-coded API keys reachable from the public internet.

Compliance Mapping

Every finding maps to GDPR, PCI DSS, SOC 2, ISO 27001 and NIS2 controls, exportable as a PDF for auditors.

Frequently Asked Questions

What is a good free ImmuniWeb alternative?
SecScanner runs 62 automated security checks on any website — HTTP security headers, TLS/SSL configuration, DNS and email authentication, and content vulnerabilities — and gives you a fix for each failure rather than only a grade. The first scan needs no account at all: enter a domain and read the report. It covers the same header, CSP, DNSSEC and compliance ground as ImmuniWeb's free website test, and adds certificate, cipher suite and email-authentication checks in the same run.
How is SecScanner different from ImmuniWeb's free test?
The biggest practical difference is scope per scan. ImmuniWeb splits its free community tests by target — a website security test, a separate SSL test, a separate domain/email test. SecScanner runs headers, TLS, DNS/email and content checks in a single scan and returns one score with one remediation list. ImmuniWeb also offers an AI bot protection test, which SecScanner does not.
Do I need to create an account to scan?
No. Your first scan runs without an account — type a domain, get the free report. An account is only needed to keep scan history, re-scan after a fix, and turn on continuous monitoring with alerts.
Does SecScanner produce a compliance report?
Yes. Findings are mapped to GDPR, PCI DSS, SOC 2, ISO 27001 and NIS2 controls, and the compliance view exports to PDF. See the compliance page for the full control mapping.
Is there an API for CI/CD?
Yes, on the Pro plan. POST a URL to /api/v1/scans with an API key and you get structured JSON back: every check with pass/fail status, risk level and fix guidance. Use it as a build gate or in scheduled monitoring scripts.
Is SecScanner free?
The free tier covers 24 checks across headers, TLS and content, with no credit card and no account for the first scan. The remaining 38 checks — CORS and Cross-Origin policies, DNS and email security, vulnerability detection — plus continuous monitoring, alerts and API access are on the Pro plan at $19/month.
Can I get alerted when my site's security changes?
Yes, on the Pro plan. Add a domain to continuous monitoring, choose daily or weekly scans, and SecScanner notifies you by email, Slack or webhook when any check changes state — so a deploy that drops your CSP gets caught before an attacker finds it.

More Free Security Checkers

Or go straight to the layer you care about.

SSL Checker

Certificate expiry, TLS version, cipher suites

Email Security Checker

SPF, DKIM & DMARC for your domain

Security Headers Checker

CSP, HSTS, frame policy and cookie flags

7 Scanners Compared

How the free security scanners stack up

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62 checks, one report, a fix for every failure. No account needed for your first scan.

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Comparing more tools? We tested 7 free website security scanners side by side.