An SEO checker is a tool that analyzes a website's search engine optimization and identifies issues that may be preventing it from ranking well in Google and other search engines. Whether you're checking your own site or analyzing a competitor's, an SEO checker gives you the data you need to make informed decisions about your search strategy.
ScoreCraft's free SEO checker goes beyond basic checks. We analyze 90+ ranking signals across 13 categories and present the results in a clear, prioritized format — so you know exactly what matters most and what to fix first.
What Our SEO Checker Analyzes
When you run a website through our SEO checker, we examine every aspect of its search optimization:
Title Tags & Meta Descriptions
Your title tag is the single most important on-page SEO element. It tells Google what your page is about and appears as the clickable headline in search results. We check every page for missing, duplicate, or poorly optimized title tags. We also check meta descriptions — the preview text that appears below your title in search results.
Header Structure
A proper heading hierarchy (H1, H2, H3) helps both users and search engines understand your content. We check for missing H1 tags, multiple H1s, skipped heading levels, and generic headings that don't describe the content.
Image Optimization
Images without alt text are invisible to search engines. We check every image for alt attributes, file size optimization, and proper formatting. Large, uncompressed images also slow down your page — hurting both user experience and rankings.
Internal Link Structure
Internal links help search engines discover and understand your content. We check for orphan pages (pages with no internal links pointing to them), broken links, and overall link structure health.
Robots.txt & Crawlability
If search engines can't crawl your pages, they can't rank them. We check your robots.txt file for misconfigurations that might be blocking Googlebot or AI crawlers like GPTBot and ClaudeBot.
Page Speed
Google uses Core Web Vitals as a ranking factor. We measure your Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS) to see how your site performs against Google's thresholds.
Mobile Friendliness
More than 60% of Google searches happen on mobile devices. We check that your site is responsive, tap targets are properly sized, and content doesn't overflow the viewport.
Security
HTTPS is a confirmed Google ranking signal. We check your SSL certificate, security headers, mixed content issues, and other security fundamentals that affect both rankings and user trust.
Structured Data
Schema markup helps search engines understand your content and can unlock rich snippets — enhanced search results that get significantly higher click-through rates. We check for common schema types like FAQ, Review, Product, and LocalBusiness.
AI Visibility
A growing source of referral traffic comes from AI assistants. We check whether your site is accessible to ChatGPT, Gemini, Claude, and Perplexity. Many websites have accidentally blocked these crawlers without realizing it.
Check Your Site vs. Check a Competitor
Our SEO checker works with any publicly accessible website. This makes it useful for two scenarios:
- Check your own site — Find and fix the issues holding you back from higher rankings
- Check a competitor — See what they're doing well (and what they're not) to inform your own strategy
With a ScoreCraft paid plan, you can add competitors to your watchlist and get side-by-side comparisons showing exactly where you lead and where you trail.
How to Use the Results
After running the SEO checker, you'll receive:
- A Growth Score (0-100) — Your overall SEO health at a glance
- 13 category sub-scores — See exactly which areas are strong and which need work
- A prioritized action plan — Every issue ranked by impact with step-by-step fix instructions
- Exportable PDF report — Share with your developer, team, or clients (paid plans)
Focus on the top 3-5 findings first. The issues at the top of your list are the ones that will have the biggest impact on your rankings. Most users see measurable improvement within 1-2 weeks of fixing their highest-priority items.
Free SEO Tools for Quick Checks
Want to check specific elements without running a full audit? Use our free tools:
- Meta Description Checker — Preview your search result snippet
- Title Tag Previewer — See how your title appears in Google
- Robots.txt Analyzer — Check what crawlers can access
- Open Graph Previewer — Preview your link on social media
For a deeper understanding of SEO scores and what they mean, read our guide on what makes a good SEO score.