Menu
Technical issues2026-06-28

How to check site security: free tools and checklist

Short answer

Site security check via 5 free tools: Sucuri SiteCheck (scans for viruses and blacklists), Google Safe Browsing (checks Google warnings), Mozilla Observatory (HTTPS configuration), Qualys SSL Labs (detailed SSL check), SecurityHeaders.com (HTTP headers check). Plus: install firewall (Cloudflare free), CMS scanner (Wordfence for WordPress). Monthly checks mandatory.

Site security check is regular hygiene like backups. 80% of hacks happen not from "genius hackers" but from automated bots scanning the internet for outdated plugins and weak passwords. Regular checks catch problems before disaster.

5 free security tools

  1. Sucuri SiteCheck — virus and blacklist scan.
  2. Google Safe Browsing — checks Google warnings.
  3. Mozilla Observatory — HTTPS configuration grade.
  4. Qualys SSL Labs — detailed SSL check.
  5. SecurityHeaders.com — HTTP headers grade.

Security checklist

  • SSL active + HTTPS redirect + no mixed content.
  • HSTS, X-Content-Type-Options, CSP headers.
  • CMS + plugins updated.
  • 2FA on all admin accounts.
  • Strong passwords (16+ chars).
  • Daily backups.
  • Firewall (Cloudflare minimum).

Check frequency

  • SiteCheck — weekly.
  • Safe Browsing — monthly.
  • Full audit — quarterly.

This question is also asked as:

  • •how to check website security
  • •website security audit
К
Команда Adaptive Lab
AI-SEO эксперты

Need an expert look at your case?

Free SEO audit within 1–2 days — we'll identify your growth bottlenecks and give a concrete action plan.

Get free audit Learn about audit

Related questions

Other

What to do if my website was hacked: step-by-step

Other

What to do if my website was copied: step-by-step

Technical issues

How to set up a WordPress site for SEO from scratch?

Technical issues

What are Core Web Vitals and why do they matter for SEO?

All questions