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.

Back to Search

weblio.jp

https://weblio.jp· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

weblio.jp

Mobile

Sponsored

Hosting Provider

IDCFNet

IP Address

210.236.244.76

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS4694

Organization

IDCFNet

Server

Apache

Nameservers

ns-1077.awsdns-06.org.ns-1595.awsdns-07.co.uk.ns-74.awsdns-09.com.ns-999.awsdns-60.net.

Performance

Page Speed

51 KB

7 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

IDCFNet

Technology Stack

3 Technologies Detected

Libraries

jQuery

jQuery UI

Web Servers

Apache

SEO Analysis

F29/100

weblio.jpweblio.jp

エラーコード：404

No description available for this page.

Title Length10 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1
• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

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Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

322d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.12.2025

Valid Until

06.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.weblio.jpweblio.jp

SHA-256 Fingerprint

E8:96:C8:FD:C7:8F:2B:94:BA:52:A0:26:F3:0B:83:60:42:7C:CC:9A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟣 Private(private)

connection

Keep-Alive

content-type

text/html;charset=UTF-8

date

Tue, 17 Feb 2026 19:02:03 GMT

keep-alive

timeout=5, max=100

server

Apache

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt2.aspmx.l.google.com

aspmx2.googlemail.com

aspmx3.googlemail.com

alt1.aspmx.l.google.com

+1 more

Domain Information

weblio.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

ＭＳＰゴシック

29/100

Readability

/30

10/40

12px · LH --

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

ＭＳＰゴシック

Sans

Body Font

ＭＳＰゴシック

Sans12px

Contrast Ratio

Reading Comfort

~135 CPL

Needs attention

14px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

❌ Very long lines: ~135 chars/line causes eye strain. Use max-width: 65ch.

⚠️ Cramped layout: 34 elements lack adequate spacing.

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Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.weblio.jp(3)ajax.googleapis.com(1)

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Last analyzed: 17 Feb 2026 at 19:02

Historical Analysis & Change Tracking