Free Website SEO Audit Tool — Technical SEO, On-Page SEO, Performance, Security & Schema Checker

Audit your website technical and on-page SEO parameters client-side instantly. Audit headings, sitemaps, structured schemas, meta tags, redirects, and robots.txt.

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How to Use Website SEO Audit & Technical SEO Analyzer

  1. Enter the target website domain in URL scan mode or switch to Paste mode.
  2. Watch the live scanner timeline evaluate headings outline, Open Graph social tags, JSON-LD schemas, security response headers, and robots.txt files.
  3. Inspect errors, warnings, and passed signals categorized by Technical, On-Page, Security, and Accessibility.
  4. Check specific paths with the Robots.txt Rule Indexability Tester.
  5. Download custom PDF reports, copy fix code snippets, or print the checklists.

What is a Website SEO Audit?

An SEO audit is a health check for your website that highlights technical issues, on-page layout errors, accessibility gaps, and security risks. Resolving these issues ensures search engines can fully crawl, index, and rank your content.

Understanding Technical vs On-Page SEO

Technical SEO refers to behind-the-scenes optimizations like SSL coverage, HSTS security headers, robots.txt crawl rules, canonical tags, and mobile-friendly viewport scaling. On-Page SEO involves optimizing visible content elements like title lengths, headings hierarchies, image alt descriptions, and keyword distribution.

Why Structured Schema Markup is Crucial

JSON-LD schema markups provide search engines with semantic context, enabling search engines to generate rich result snippets. While schema does not directly improve ranking algorithms, rich snippets significantly improve user click-through rates.

Response Security Headers & SEO Impact

HTTP security headers (such as Strict-Transport-Security, Content-Security-Policy, and X-Frame-Options) protect user communication protocols. Search engines favor secure, HTTPS-enforced applications to maintain browsing trust.

Frequently Asked Questions

What is a Website SEO Audit?
A Website SEO Audit evaluates a website’s technical, on-page, accessibility, and security configurations to find issues that might limit search engine crawlability and keyword ranking potential.
Is my URL or HTML content safe and private?
Yes. All parsing, HTML tags mapping, and heading tree extractions are processed entirely locally inside your browser sandbox. No content is stored or uploaded.
Why does this tool run entirely client-side?
Running client-side ensures absolute privacy and completely prevents Server-Side Request Forgery (SSRF) security risks, local intranet exposures, or proxy abuses.
How is the overall SEO score computed?
The score is a weighted calculation reflecting the ratio of passed, warning, and error signals across Technical SEO, Content Quality, Accessibility, Response Headers, and Structured Data.
What is structured data / schema markup?
Structured data is a standardized format (JSON-LD) for providing search engines with explicit clues about the meaning of a page (e.g., specifying that it is a product, recipe, article, or software application).