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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gematsu.com

https://gematsu.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

gematsu.com

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.13.127

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

tori.ns.cloudflare.com.clay.ns.cloudflare.com.

Performance

Page Speed

914 KB

98 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Gematsu Redesign Themev8.6.0

by 44 Bytes Ltd

View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

13 Technologies Detected

Plugins

Wordpress Popular Posts

Libraries

CSS Frameworks

Analytics

Fonts

Social

Comments

CDN

SEO Analysis

B76/100

gematsu.comgematsu.com

Gematsu - Japanese Video Game News

Japanese and western video game news by Gematsu. Comprehensive, no-nonsense coverage of announcements and releases.

Title Length34 chars

Recommended: 50-60 chars

Description Length115 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (57/57)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,322 URLs

robots.txt

9 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

31%Critical

Interactive

HTTPS

WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

14.01.2026

Valid Until

14.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

gematsu.com*.gematsu.com

SHA-256 Fingerprint

9C:81:AC:C2:E5:CA:6B:D4:15:9F:09:01:C8:61:C3:38:AA:C4:F5:6F...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d0838770eca9bf4-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Thu, 19 Feb 2026 19:37:44 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

aspmx2.googlemail.com

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

gematsu.com

Domain Age

20y 11m

Created

27.03.2005

Expires

27.03.2026

Last Updated

28.03.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Roboto

57/100

Readability

/30

12/40

14px · LH 1.30

Hierarchy

/20

15/25

1.11x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Roboto

Sans15px

Body Font

Roboto

Sans14px

Contrast Ratio

Reading Comfort

~50 CPL

Optimal (45–75)

15px

27px

15px

14px

Minor Second

Scale

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

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Optimal line length: ~50 characters per line is comfortable to read.

GGoogle Fonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Social Media

ShareThisFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

gematsu.disqus.com(6)gematsu.com(4)googletagmanager.com(2)google-analytics.com(1)buttons-config.sharethis.com(1)

Website Identity

Facebook X (Twitter)YouTube Bluesky

Sponsored

Last analyzed: 19 Feb 2026 at 19:37

Historical Analysis & Change Tracking