How to Check Website Security: Free Tools and Practical Fixes

Website security is not a concern limited to banks or large corporations. Every website — including small blogs, portfolio sites, and tool directories — is a target. Automated bots scan the internet continuously, probing for weak passwords, outdated software, and misconfigured servers. If your site has a vulnerability, it will be found.

The consequences of a compromised website range from embarrassing to severe. Hackers may redirect your visitors to spam pages, steal data, install malware on visitors' devices, or use your server to send phishing emails. Google may blacklist your site, removing it from search results entirely until the problem is resolved.

What attackers typically want from small websites:

• •Server resources to send spam or run cryptocurrency mining scripts
• •Your visitors' data, including email addresses and passwords
• •A platform to host phishing pages that impersonate banks or brands
• •Backlinks from your domain to boost their own spam sites
• •Access to admin credentials to sell on underground markets

Signs your website may already be compromised:

• ✗Google Search Console showing a security warning
• ✗Visitors reporting antivirus alerts when visiting your site
• ✗Unexpected redirects to unrelated sites
• ✗New admin users you did not create
• ✗Pages appearing in Google search results that you never published
• ✗Hosting provider suspending your account for suspicious activity

The good news: Most successful attacks exploit known, preventable vulnerabilities — outdated software, weak passwords, missing HTTPS, and no security monitoring. Fixing these basics eliminates the vast majority of risk for a typical small website.

Key takeaway: You do not need to be a security expert to protect your website. You need to understand the most common vulnerabilities and check for them regularly using free tools.

You can run a comprehensive security check on any website using free tools — no technical background required. These tools scan for common vulnerabilities and give you an actionable report within minutes.

SSL Labs SSL Test (ssllabs.com/ssltest): Tests your HTTPS configuration in detail. Grades your SSL certificate from A+ to F. A good site should score A or A+. Anything below B needs immediate attention.

• ✓Checks certificate validity and expiry date
• ✓Identifies weak cipher suites that could expose encrypted traffic
• ✓Completely free, no account required

Mozilla Observatory (observatory.mozilla.org): One of the most comprehensive free security header scanners available. Tests HTTP security headers, cookie settings, content security policies, and more.

• ✓Grades your site from A+ to F
• ✓Shows exactly which headers are missing and what to add
• ✓Includes recommendations ranked by priority
• ✓Free, no account required

Sucuri SiteCheck (sitecheck.sucuri.net): Scans your website for malware, blacklisting status, and known security issues. Checks whether your domain appears on Google Safe Browsing, Norton, McAfee, or ESET blacklists.

• ✓Detects injected malware and spam content
• ✓Checks multiple security blacklists simultaneously
• ✓Identifies outdated CMS versions (WordPress, Joomla, etc.)
• ✓Free for basic scans

Google Safe Browsing Check (transparencyreport.google.com/safe-browsing/search): Check if Google has flagged your site as dangerous. This is the definitive check — if your site appears here, visitors using Chrome will see a red warning page before they can access your content.

• ✓Official Google tool
• ✓Instant results
• ✓Free

Qualys FreeScan (freescan.qualys.com): Enterprise-grade vulnerability scanner available free for single-site scans. Checks for OWASP Top 10 vulnerabilities, malware, and SSL issues.

Security check summary:

Running a scanner gives you a list of issues. Understanding what each one means helps you prioritise which to fix first and which are lower risk.

1. HTTPS and SSL certificate HTTPS encrypts data between your visitor's browser and your server. Without it, data transmitted — including form submissions, login credentials, and contact details — can be intercepted. In 2025, HTTPS is non-negotiable. Chrome marks HTTP sites as "Not Secure."

• ✓Check: Does your site load on https:// without warnings?
• ✓Fix: Get a free SSL certificate from Let's Encrypt through your hosting provider

2. HTTP Security Headers Security headers are lines of code sent by your server that tell browsers how to behave on your site. Missing headers leave your visitors exposed to specific attack types.

3. Software version and updates Outdated CMS platforms (WordPress, Joomla), themes, and plugins are the leading entry point for attackers. Known vulnerabilities in old versions are publicly listed and actively exploited by automated bots.

• ✓Check: Are WordPress core, themes, and plugins on their latest versions?
• ✗Risk: Running WordPress 5.x in 2025 exposes dozens of known, patchable vulnerabilities

4. Admin login protection Default login URLs (/wp-admin, /administrator) are targeted by brute-force bots that attempt thousands of password combinations automatically.

• ✓Change the default login URL using a plugin (for WordPress: WPS Hide Login)
• ✓Enable two-factor authentication (2FA) on all admin accounts
• ✓Limit login attempts to block brute-force attacks

5. File permissions Incorrect file permissions can allow attackers to read, modify, or execute files they should not have access to.

• ✓Recommended: Directories set to 755, files set to 644
• ✗Never set files or directories to 777 — this grants full read, write, and execute access to everyone

6. Database security

• ✓Change the default WordPress database prefix (wp_) to something unique
• ✓Use a strong, unique database password
• ✓Disable remote database access if not needed

Security improvements follow a clear priority order. Start with changes that are free, fast, and eliminate the highest-risk vulnerabilities first.

Priority 1 — Enable and verify HTTPS (15 minutes)

• •Check your hosting control panel for a free Let's Encrypt SSL certificate
• •Install and activate it — most hosts do this in one click
• •Add a redirect rule so all HTTP traffic automatically goes to HTTPS
• •Verify with SSL Labs — target grade A or higher

Priority 2 — Keep everything updated (ongoing, 10 minutes per week)

• •Enable automatic updates for WordPress core
• •Update themes and plugins weekly — do this before publishing new content
• •Remove themes and plugins that are inactive — they still present attack surface even when disabled

Priority 3 — Install a security plugin (30 minutes) For WordPress sites, a good security plugin handles many protections automatically:

• ✓Wordfence — free firewall, malware scanner, and login protection
• ✓Solid Security (formerly iThemes Security) — file change monitoring and brute-force protection
• ✓MalCare — cloud-based malware scanning with one-click cleanup

Priority 4 — Add HTTP security headers (30–60 minutes)

• •WordPress: Use the HTTP Headers plugin or add headers through your .htaccess file or server config
• •Non-WordPress: Add headers in your web server configuration (Nginx or Apache)
• •Verify with Mozilla Observatory — target grade B or higher after adding headers

Priority 5 — Set up regular backups (30 minutes) A backup does not prevent an attack, but it means recovery takes hours instead of weeks.

• ✓WordPress: UpdraftPlus free tier backs up to Google Drive or Dropbox automatically
• ✓Back up both files and the database
• ✓Store backups off-server — a backup on the same compromised server is useless
• ✓Test that your backup can actually be restored — an untested backup is not a real backup

Priority 6 — Enable monitoring

• ✓Google Search Console sends email alerts if your site is flagged for security issues
• ✓UptimeRobot (free) alerts you when your site goes down — sudden downtime can indicate an attack
• ✓Sucuri SiteCheck — run monthly even if nothing seems wrong

What not to waste time on:

• ✗Security through obscurity (hiding your CMS type) — bots identify platforms from code patterns, not URLs
• ✗Overly complex firewall configurations before basic hygiene is complete
• ✗Paid security products before free options are fully implemented

Understanding what goes wrong most often helps you avoid the same traps. These are the mistakes that result in the majority of successful attacks on small websites.

Using weak or reused passwords:

• ✗Passwords like "admin123", your domain name, or your own name are cracked in seconds
• ✓Use a password manager (Bitwarden is free and excellent) to generate and store unique 20+ character passwords for every account
• ✓Change your hosting, CMS, database, and email passwords to unique strong passwords today

Not using two-factor authentication:

• ✗A stolen password is all that stands between an attacker and your admin panel without 2FA
• ✓Enable 2FA on WordPress admin, your hosting account, domain registrar, and any email account connected to your site

Ignoring plugin and theme update notifications:

• ✗Dismissing update notifications because "everything seems fine" — vulnerabilities accumulate silently
• ✓Update immediately when security patches are released — check the changelog to identify security-related releases

Using nulled themes or plugins:

• ✗Free downloads of premium plugins from unofficial sites almost always contain backdoors or malware pre-installed
• ✓Only install themes and plugins from WordPress.org or directly from the original developer

No backup strategy:

• ✗Assuming your hosting provider keeps backups — most do, but they are not guaranteed and may not cover recent data
• ✓Run your own automated backups to an off-server location every 24 hours

Leaving unused admin accounts active:

• ✗Old team members, freelancers, or test accounts with admin access that were never removed
• ✓Audit user accounts quarterly and remove anyone who no longer needs access

Mistakes that create the most damage:

Website security and search rankings are more tightly connected than most site owners realise. Google actively penalises sites that pose a risk to visitors, and recovery from a security penalty can take months.

How a security incident damages your SEO:

Google Safe Browsing blacklisting is the most severe outcome. When Google detects malware, phishing content, or deceptive pages on your site, it adds your domain to the Safe Browsing list. Chrome then shows a full-screen red warning before visitors can access your site. Traffic drops to near zero immediately, and even after cleaning the site and requesting a review, the warning can take days to remove.

Manual action penalties in Google Search Console are issued when a human Google reviewer finds policy violations — including hacked content and spam injected by attackers. Manual actions can suppress rankings for individual pages or the entire site.

HTTPS is a confirmed ranking signal. Google has used HTTPS as a ranking factor since 2014 and has progressively increased its weight. A site still running HTTP in 2025 is at a ranking disadvantage compared to equivalent HTTPS sites.

Security signals Google checks:

• ✓Valid, unexpired SSL certificate
• ✓No pages on Google Safe Browsing blacklist
• ✓No manual action penalties in Search Console
• ✓No suspicious outbound links (injected by malware)
• ✓No cloaking — showing different content to Google than to visitors

How to monitor security impact on SEO:

• •Check Google Search Console Security Issues report monthly
• •Set up Google Alerts for your domain name — flagged sites sometimes appear in security news
• •Run Sucuri SiteCheck monthly even when everything appears normal
• •Monitor organic traffic in Google Analytics — a sudden unexplained drop can indicate blacklisting

Recovery timeline after a security incident:

Strengths of proactive security for SEO:

• ✓Prevents ranking penalties before they happen
• ✓Builds trust signals that correlate with lower bounce rates
• ✓HTTPS + good security headers improve perceived credibility

Weaknesses of reactive security:

• ✗Recovery costs far more time and money than prevention
• ✗Traffic and revenue lost during blacklisting may not fully recover
• ✗Repeat incidents can trigger longer-lasting trust penalties from Google

Key takeaway: Treat website security as part of your SEO strategy, not as a separate IT concern. A secure site ranks better, retains visitors better, and never suffers the catastrophic traffic loss that follows a blacklisting event.

Use this checklist to audit your website today. Each item is free to check and most are free to fix. Work through the High priority items first — they cover the majority of real-world attack vectors.

High priority — check and fix immediately:

• ✓Site loads on HTTPS with a valid, non-expired SSL certificate
• ✓All HTTP traffic redirects automatically to HTTPS
• ✓SSL Labs score is A or A+
• ✓No Google Safe Browsing warnings (check transparencyreport.google.com)
• ✓WordPress core, all themes, and all plugins are on the latest version
• ✓No inactive themes or plugins installed
• ✓Admin account does not use username "admin"
• ✓Admin password is 16+ characters and unique to this site
• ✓Two-factor authentication enabled on admin account
• ✓Automated daily backups configured and stored off-server

Medium priority — fix within the next week:

• ✓Mozilla Observatory security header score is B or higher
• ✓X-Frame-Options header present
• ✓Strict-Transport-Security header present
• ✓X-Content-Type-Options header present
• ✓No nulled or pirated themes or plugins installed
• ✓All admin user accounts belong to current, active team members
• ✓WordPress login URL changed from default /wp-admin
• ✓Login attempt limiting active

Monitoring — set up once and leave running:

• ✓Google Search Console Security Issues alerts enabled
• ✓UptimeRobot or similar uptime monitoring active
• ✓Monthly Sucuri SiteCheck scan scheduled
• ✓Hosting account protected with 2FA
• ✓Domain registrar account protected with 2FA

Annual review tasks:

• ✓SSL certificate expiry date checked (auto-renewal configured)
• ✓All user passwords rotated
• ✓Backup restoration tested — confirm backups actually work
• ✓Full security plugin scan run and results reviewed

Key takeaway: Security is not a one-time setup. Run through the High priority section of this checklist once a month — it takes under 15 minutes and keeps the most dangerous vulnerabilities closed.