Can I use the SEO check for free?

Yes, CodeQuest.work SEO_CHECK allows up to 10 free SEO checks per month without registration. You can view your basic SEO score (out of 100) and Domain Power score.

What is structured data (JSON-LD)?

Structured data (JSON-LD) is markup that helps search engines accurately understand your page content. Using Schema.org vocabulary, it enables Rich Results (enhanced search listings) on FAQ pages, product pages, articles, and more. It's the most important category in our tool, worth 40 out of 100 points.

What are Core Web Vitals (LCP, CLS, INP)?

Core Web Vitals are Google's user experience metrics: LCP (loading speed, target under 2.5s), CLS (layout stability, target under 0.1), and INP (interaction responsiveness, target under 200ms). Our tool measures both mobile and desktop performance.

Is chat support available?

Yes, click the chat icon in the bottom-right corner anytime. We can help with usage, pricing, and SEO terminology (structured data, OGP, Core Web Vitals, etc.). Available in Japanese and English.

Can non-technical users use this tool?

Yes. Just enter a URL to get a 100-point score with improvement advice — no SEO or technical expertise required. Marketers and site owners use it to identify SEO issues and communicate specific improvement requests to developers or agencies. For keyword research and ranking tracking, we recommend combining it with Google Search Console and Google Keyword Planner.

SEO Audit Based on Google Standards

Instantly diagnose
SEO Scoreof your site

Just enter a URL to find structured data and SEO issues
with specific fixes.

Free up to 10 checks/month — no registration required

Check Items

Comprehensive diagnosis across 4 categories, 45+ items

Structured Data

40pts max

JSON-LD detection
Schema.org type analysis
Required property check

Basic SEO

30pts max

Title & meta tags
Heading structure
Canonical setup

Content

20pts max

Word count check
Image alt attributes
Internal link count

Technical SEO

10pts max

HTTPS support
Mobile optimization
Page speed

Why Teams Choose Us

Trusted by industry professionals

Web Agencies

Attach SEO scores to proposals. Back up your pitch with concrete data and improvement points.

Marketers

SEO issues become clear at a glance with scores. Easily identify what to improve and communicate effectively with your dev team.

Site Owners

Build an SEO check habit before publishing. Maximize search traffic and catch issues early.

SEO Basics

What is an SEO Check?

45+

Check items

100

Point score

An SEO check (SEO audit) is a comprehensive evaluation of how well your homepage or website is optimized for search engines. To rank higher on Google, Yahoo!, Bing, and other search engines, you need both HTML technical and content-based SEO measures.

CodeQuest.work SEO_CHECK lets you simply enter a URL to check Structured Data (JSON-LD / Schema.org), Basic SEO (title tags, meta descriptions, heading structure), Content Quality (word count, image alt attributes, internal links), Technical SEO (HTTPS, mobile-friendliness, page speed) — 4 categories, 45+ items instantly checked and visualized as a 100-point SEO score.

Learn more about SEO checks

Site Trust Indicator

What is Domain Power?

Domain Power (Domain Authority) is a metric that quantifies how much trust a website's domain has earned from search engines. Sites with higher Domain Power tend to rank new pages higher in search results.

With CodeQuest.work SEO_CHECK, you can check your Domain Power Score alongside your SEO check. Competitor domain power comparison is also available.

0〜2

New Site

3〜4

Growing

5〜7

Mid-High Authority

8〜10

Top Level

Learn more about domain power

SEO Importance

Why SEO Matters

Consistent Traffic

SEO drives organic traffic — visitors from search results. Unlike ads, once you rank high, you continue to get traffic, making SEO a long-term marketing foundation.

Rich Results

Structured data directly impacts Google's rich results (rich snippets), effectively improving click-through rates. However, diagnosing structured data manually is difficult — you need a dedicated SEO check tool.

Early Problem Detection

Regular SEO checks help detect technical issues like missing meta tags, structured data errors, and HTTPS problems early, preventing ranking drops.

Try a Free SEO Check Now

Just enter a URL.
No registration required.

View Pricing

Instantly diagnoseSEO Scoreof your site