Free Website Security Scanner: Top 10 Tools to Check Your Site Today

📝 Quick summary: A free website security scanner checks your site for malware, weak settings and known holes before attackers find them. Here are 10 free tools, with what each one checks and where it falls short.

1️⃣ Sucuri SiteCheck

Sucuri SiteCheck is the quickest place to start. You paste your address, and it looks for known malware, viruses, blacklist status, website errors, outdated software and malicious code.

It works from outside your server, so there is nothing to install. The official page also warns that remote scanners have limited access and results are not guaranteed. It will not see anything that lives only on the server side.

💡 Pro tip: Run it after every big plugin or theme update.

🔗 Visit Sucuri SiteCheck

2️⃣ Qualys SSL Labs SSL Server Test

This is the standard test for your HTTPS setup. It gives a deep analysis of how an SSL server is configured and grades it with a letter.

Use it to spot weak protocols, certificate chain problems and settings that slow things down. It checks TLS only, so it will not find malware or app bugs, and it works for public servers only.

💡 Pro tip: Aim for an A grade and re-test after any hosting change.

🔗 Visit SSL Labs

3️⃣ Security Headers

Security Headers reads the HTTP headers your site sends and grades them from A+ to F. Headers tell browsers how to treat your pages, and missing ones leave doors open.

It also flags headers such as Server and X-Powered-By that reveal too much. The official FAQ says the tool will remain free to use. If your site only redirects, you may see an R grade.

💡 Pro tip: Fix one header at a time, then re-scan to see the grade rise.

🔗 Visit Security Headers

4️⃣ OWASP ZAP

ZAP (Zed Attack Proxy) is a free and open-source web app scanner, widely used by developers and testers. It finds web app vulnerabilities and also supports manual testing.

It is the most powerful tool in this list, but it needs setup and some security knowledge. Only scan sites you own or have written permission to test.

💡 Pro tip: Test on a staging copy of your site, not the live one.

🔗 Visit OWASP ZAP

5️⃣ Pentest-Tools.com Free Edition

Pentest-Tools offers web, network, API and cloud scanning in a browser. Its free edition has no time limit and needs no credit card.

The free edition allows 5 assets per month, 2 parallel scans, 25 scheduled scans (weekly or monthly) and 90-day data retention. Scan customization is partial, so it is best for light checks of a few sites.

💡 Pro tip: Spend your 5 assets on your most important domains first.

🔗 Visit Pentest-Tools

6️⃣ Quttera

Quttera looks for suspicious scripts, malicious media and other threats hidden inside normal-looking content. Results are rated Clean, Potentially Suspicious, Suspicious or Malicious.

A scan page explains the reason for each detection, which helps you judge false alarms. Retrieved content is capped at 20 MB, and results may be slow when servers are busy. Like all scanners, it gives no guarantee.

💡 Pro tip: Compare its result with Sucuri to confirm any warning.

🔗 Visit Quttera

7️⃣ VirusTotal

VirusTotal checks a URL against many security engines at once. You can use the web page, browser extensions or its API.

It is free for non-commercial use under its terms. It tells you about reputation, such as whether engines flag your link, but it does not look for vulnerabilities in your code. API quotas are listed on a separate page.

💡 Pro tip: Scan links in your newsletter before you send them.

🔗 Visit VirusTotal

8️⃣ ImmuniWeb Website Security Test

ImmuniWeb runs many non-intrusive checks, such as CMS versions, known vulnerabilities, HTTP security headers, cookies, JavaScript libraries and WAF presence. It also covers GDPR and PCI DSS items.

The Community Edition is a free online tool with a PDF report, intended for small businesses, local governments, colleges, students and individual engineers. Scan quotas are not stated on the main page.

💡 Pro tip: Save the PDF each month to track your progress.

🔗 Visit ImmuniWeb

9️⃣ WPScan

WPScan focuses only on WordPress. It uses a dedicated database of known WordPress core, plugin and theme vulnerabilities, which makes it very useful for blog owners.

An official blog post says the API allows 50 daily requests free of charge, while paid plans give more. That post may be dated, so confirm current terms on wpscan.com before you rely on it.

💡 Pro tip: Remove plugins you do not use, since each one adds risk.

🔗 Visit WPScan

🔟 Nikto

Nikto is a lightweight command-line web server scanner. It looks for risky files, outdated components and common misconfigurations.

The code is licensed under GPLv3, and it is cross-platform with Perl and OpenSSL, with Docker images available. Its database files can only be used with Nikto, so read the licence if you plan to reuse them.

💡 Pro tip: Only scan servers you own, and tell your host first if required.

🔗 Visit Nikto