Diagnose SEO with
pro-level criteria
and auto-generate fix code
45 checks curated from real-world experience. From finding issues to
generating fix code — just enter a URL.
10 free checks without registration — sign up for 10/month
Sign up free for dashboard, history, and score trends
Check Items
One-click 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
How teams use SEO_CHECK
Web Agencies
Include SEO scores and fix code in proposals. Data-backed improvement plans make your pitch more persuasive.
Marketers
Spot issues at a glance with scores. Prioritize improvements and give your dev team clear, actionable briefs.
Site Owners
Run a quick SEO check before publishing. Catch issues early and maximize your search traffic.
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.
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
Why SEO Matters
Zero-cost traffic foundation
Unlike paid ads, organic search traffic keeps flowing once you rank. Regular SEO checks help you maintain rankings and build a sustainable traffic foundation.
Boost CTR with structured data
Structured data directly powers Google's rich results, dramatically improving click-through rates. Our tool handles everything from JSON-LD detection to fix code generation.
Prevent ranking drops
Missing meta tags, structured data errors, HTTPS issues — catch hard-to-spot technical problems with regular checks before they hurt your rankings.
Track how your score changes
Save check results and measure the impact of your improvements.
Check History
Compare past results side by side
Score Trends
Visualize improvement over time
Billing & Plans
Securely managed via Stripe
Just an email address — no credit card required
Diagnose → Improve → See the Score Change
A real example of improvements made based on SEO_CHECK results
SEO Audit Designed by a Hands-On Director
Designed by an experienced web director, based on the exact checks performed before every site delivery.
Built as "the audit to run after Google Search Console" — going beyond analysis to auto-generate fix code. Focused on structured data, meta tags, and technical SEO items that make a real difference in practice.
Web Director / UI・UX Designer / Frontend Engineer
Run a Free SEO Check Now
No registration required — results in 10 seconds.
See exactly what to fix and get the code to do it.
When there are many issues to fix, it can be hard to know where to start. If handling it in-house is difficult, consulting an experienced web agency is also an option.
RINIA — Web Development & SEO Consulting