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SEO Diagnostic Checker — On-Page Score

SEO Diagnostic Checker — On-Page Score

by: Assistant Gomez
Enter your page title, meta description, URL, headings, and body text and get an instant 0-100 SEO score across 5 categories — Title Tag, Meta Description, URL Structure, Heading Structure, and Content Quality (each worth 20 points). Every check shows pass / warning / fail with a specific fix, plus a priority list of your top improvements and a keyword density calculator. 100% offline, rule-based, no API. Single HTML file that works forever.
#Produkt#Marketing#Produktivität
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The problem
You wrote an article and hit publish, but it's not ranking. You know SEO matters but checking every element manually is tedious — and most audit tools cost $50-$200/month.

What this tool does
A single HTML file that scores your page's on-page SEO across 5 categories (each worth 20 points, 100 total) with 20+ individual checks:

  1. Title Tag (20 pts) — keyword presence, position, character length
  2. Meta Description (20 pts) — keyword inclusion, length, CTA words, uniqueness vs title
  3. URL Structure (20 pts) — HTTPS, path length, hyphens, keyword in URL, clean characters
  4. Heading Structure (20 pts) — H1 keyword match, single H1, H2 count, H2 keyword variations
  5. Content Quality (20 pts) — keyword density (1-3% target), content length, first-paragraph keyword, data/numbers, sentence variety

How it works

  • Enter your target keyword + page elements → Click analyze → Instant 100-point score
  • Every check shows pass / warning / fail with specific fix instructions
  • Priority improvement list ranks your top fixes by impact
  • Grade system: S (90+) / A (70-89) / B (50-69) / C (30-49) / D (0-29)

Key features

  • 20+ checks across 5 categories — covers all major on-page SEO factors
  • Actionable fixes — every issue comes with a specific recommendation
  • Priority ranking — shows your highest-impact improvements first
  • Keyword density calculator — real-time density analysis with stuffing detection
  • 100% offline — no server, no API key, no data leaves your browser
  • Works forever — no subscription, no usage limits

Who it's for

  • Bloggers and content creators who want better Google rankings
  • Small business owners managing their own SEO
  • Freelance writers who deliver SEO-optimized content
  • Anyone who publishes web content and wants a quick SEO sanity check

Included

  • seo_diagnostic_checker_v1.html (single HTML file)
  • Works on Chrome, Firefox, Safari, Edge
  • No dependencies, no installation

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