Free Tools 4 min read

Introducing DECO: The Free SEO Scanner That Reverse-Engineers Google’s Ranking Algorithm

In May 2024, thousands of internal API documents from Google’s Content Warehouse leaked publicly — revealing 2,596 modules and 14,014 attributes that power Google’s ranking systems. Signals like contentEffort, pandaDemotion, siteAuthority, and NavBoost were exposed for the first time. For the SEO industry, it was the clearest look yet at how Google actually evaluates content — and it made most existing SEO tools look like they were measuring the wrong things entirely.

We built DECO to fix that. It is a free SEO scanner that evaluates any URL against the real signals Google uses — not domain authority proxies, not meta tag checklists, not readability scores. Real signals, pulled from leaked data and published patents.

Why Most SEO Audits Miss the Point

The majority of SEO audit tools were built before the Content Warehouse leak. They rely on proxy metrics — things like domain authority, page speed scores, keyword density — that correlate loosely with rankings but do not reflect how Google’s classifiers actually score a page. If you are operating in a competitive vertical like iGaming SEO, sweepstakes casino SEO, or crypto, auditing with the wrong signals means fixing the wrong things.

DECO maps directly to the internal attributes Google’s systems use. When you run a scan, you are not getting a score based on what an SEO tool vendor thinks matters — you are getting a score based on what Google’s own leaked documentation says it is measuring.

What DECO Analyses: The 12 Ranking Signals

Every DECO scan runs your page through 12 signals extracted from three primary sources: the Content Warehouse API leak, the Panda Quality Classifier patent (US9031929B1), and the Information Gain patent (US11354342B2). The analysis combines 7 local classifiers with 5 AI-powered deep factors running in parallel, using Claude and GPT-4o to evaluate content effort, information gain, and YMYL compliance.

The core signals include Content Effort Score (measuring word count depth, lexical diversity, and information density against Google’s LLM content effort classifier), Panda Quality Check (n-gram filler phrase detection from the Panda patent that flags thin content and template language patterns), AI Pattern Detection (detecting LLM-generated vocabulary patterns and sentence uniformity that read like AI output), E-E-A-T Signals (checking for author credentials, first-person experience, citations, and data points mapped to Google’s Experience-Expertise-Authority-Trust framework), NavBoost Readiness (evaluating user engagement structural signals like conclusion presence and FAQ sections), and Information Gain (AI-powered analysis of content uniqueness versus existing SERP results).

How to Use It

Using DECO takes under 60 seconds. Navigate to seo.godrank.com, enter any target URL or paste raw HTML source code, and click Execute. Our multi-proxy engine bypasses CORS, cookie walls, and anti-bot protection to fetch the page. The AI then runs 7 local classifiers and 5 deep-analysis factors in parallel before returning a detailed report with scores per signal, identified issues, and copy-paste fix prompts for each factor.

No account is required. The tool works on any publicly accessible URL, and reports can be downloaded as PDFs for client deliverables. For SEO agencies and in-house teams, the white-label PDF output makes it immediately useful for client reporting.

Who It Is Built For

DECO is built for practitioners who want to audit pages against what Google actually measures. SEO professionals can use it to audit client pages before and after content changes. Content teams can run pages through it before publishing to catch Panda-triggering patterns and thin content signals. Agencies can use the PDF export for client-facing deliverables. Publishers can verify that editorial content meets Google’s quality bar before going live.

It is especially useful in competitive, high-stakes verticals where ranking accuracy matters — the same markets GODRANK specialises in: iGaming, sweepstakes, crypto, pharma, and fintech. In these sectors, getting the content signals wrong is expensive.

Try It Free

DECO is free to use with no account required. Scan any URL at seo.godrank.com and see exactly how Google’s classifiers score your content.