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

sakura.ne.jp

https://sakura.ne.jp· First analyzed 11 Feb 2026· Updated 11 Feb 2026

Export

sakura.ne.jp

Mobile

Sponsored

Hosting Provider

SAKURA

IP Address

163.43.179.80

Server Location

🇯🇵 Osaka, Japan

ASN

AS9370

Organization

SAKURA

Server

Nginx

Nameservers

ns1.dns.ne.jp.ns2.dns.ne.jp.

Performance

Page Speed

2 MB

110 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Technology Stack

8 Technologies Detected

Analytics

CSS Frameworks

Fonts

Tag Managers

Advertising

Microsoft Advertising

Web Servers

Nginx

SEO Analysis

C64/100

sakura.ne.jpsakura.ne.jp

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Title Length39 chars

Recommended: 50-60 chars

Description Length112 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (23/32)

4 issues found

Upgrade to view details

Sponsored

A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

170d

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0, must-revalidate, s-maxage=60, public)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-length

9919

content-type

text/html; charset=UTF-8

date

Wed, 11 Feb 2026 02:30:46 GMT

Good Warning Issue

Typography & Readability

Noto Sans JP

66/100

Readability

/30

40/40

16px · LH 1.70

Hierarchy

/20

25/25

2.75x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Noto Sans JP

Sans44px

Body Font

Noto Sans JP

Sans16px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

44px

37px

28px

16px

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

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

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

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

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

MarketoEnterprise

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Microsoft AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(9)connect.facebook.net(4)munchkin.marketo.net(2)bat.bing.com(2)cs.nakanohito.jp(1)

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Last analyzed: 11 Feb 2026 at 02:31

Historical Analysis & Change Tracking