What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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3web.ne.jp

https://3web.ne.jp· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

3web.ne.jp

Mobile

Sponsored

Hosting Provider

interQ

IP Address

160.251.64.60

Site Location

🇯🇵 Japanvia tld

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS7506

Organization

interQ

Server

Apache

Nameservers

ns1.gmointernet.com.ns1.gmointernet.jp.

Performance

Core Web Vitals

Weight

First Contentful Paint

3.3 s10%

Speed Index

4.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2 KB

10 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

interQ

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Web Servers

Apache

SEO Analysis

F35/100

Meta Tags5/15

Content0/12

Headings0/8

Technical4/21

E-E-A-T3/7

Images4/7

Links2/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

3web.ne.jp3web.ne.jp

3Web | プロバイダーサービス

プロバイダー「3Web」です

Title Length17 chars

Recommended: 50-60 chars (~106px / 580px)

Description Length14 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (4 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

Local SEO

Local Search Readiness

0/100

Poor

15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F31/100

Bot Access

20/25

Machine Read.

6/25

Schema Data

0/25

Citation

5/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:0%

Words:1

Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

3/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

53/100

A+

<0.001 g

CO₂e / view

2.5 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

36 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

HTML

1.0 KB

Other

1.4 KB

Green Hosting Not Verified

interQ

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

40%Critical

No SSL

No WAF

N/A

Upgrade to view header details

HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

772

content-type

text/html

date

Sat, 25 Apr 2026 19:01:08 GMT

keep-alive

timeout=5, max=100

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

vmx.3web.ne.jp

Domain Information

3web.ne.jp

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

30/100

Not Mobile Friendly

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Times New Roman

WCAG Partial

63/100

Readability

/30

21/30

16px · LH --

Hierarchy

/20

10/20

WCAG

/25

18/25

1.64:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Body Font

Times New Roman

Serif16px

Contrast Ratio

1.64:1

1 issue

Reading Comfort

Single Family

left aligned

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.6:1).

✅ Lean font stack: 1 font families keeps load times fast.

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFonts

Color Palette

11 unique colors

Light

#ffffff

Background· 57.2%

#fff0e9

Primary· 10%

#fdcbc9

Accent· 8.9%

#fe9900

Accent· 8.6%

#f2b68f

Accent· 4.4%

#eaddc9

Secondary· 3%

#6c6047

Secondary· 2.8%

#d7b799

Secondary· 1.4%

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Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cache.img.gmo.jp(1)

Website Identity

3web.ne.jp

Location detected: 🇯🇵 Japanvia tld

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Last analyzed: 25 Apr 2026 at 19:01

Historical Analysis & Change Tracking