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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infoseek.co.jp

https://infoseek.co.jp· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

infoseek.co.jp

Mobile

Sponsored

Hosting Provider

Rakuten, Inc.

IP Address

133.237.179.46

Server Location

🇯🇵 Chiyoda City, Japan

ASN

AS23820

Organization

Rakuten, Inc.

Nameservers

ns02.rakuten.ad.jp.ns06.rakuten.co.jp.ns03.rakuten.co.jp.ns01.rakuten.co.jp.+2 more

Performance

Page Speed

668 KB

228 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Rakuten, Inc.

Detected API Sources

https://cdn.id5-sync.com/api/1...

Technology Stack

6 Technologies Detected

Advertising

Google Ads Criteo Taboola

Libraries

jQueryv3.5.1

Other

lazysizes

CSS Frameworks

Tailwind CSS

SEO Analysis

C64/100

infoseek.co.jpinfoseek.co.jp

Infoseek[インフォシーク] - 楽天が運営するニュースサイト

Infoseek（インフォシーク）は、社会、経済、国際、芸能、スポーツ、IT、天気等の最新ニュースを配信しています。楽天ポイントが獲得出来るお小遣いコンテンツ（ポイ活）やお得な情報も充実しています。

Title Length34 chars

Recommended: 50-60 chars

Description Length99 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag - page may not be mobile-friendly

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

59 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

200d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.09.2025

Valid Until

01.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.infoseek.co.jpinfoseek.co.jp

SHA-256 Fingerprint

EF:82:9C:AA:4D:3F:63:72:2D:F7:A7:BA:48:B9:E5:02:09:2B:90:89...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cache-control

🟡 60s(max-age=60)

content-encoding

📦 Gzip(gzip)

content-language

content-length

33373

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

infoseek-co-jp.mail.protection.outlook.com

Domain Information

infoseek.co.jp

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

メイリオ

36/100

Readability

/30

24/40

14px · LH 1.20

Hierarchy

/20

11/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

メイリオ

Sans0

Body Font

メイリオ

Sans14px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

16px

18px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ 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.

⚠️ Cramped layout: 35 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

TaboolaMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)securepubads.g.doubleclick.net(3)r.r10s.jp(1)nr-events.taboola.com(1)cdn.id5-sync.com(1)

Website Identity

X (Twitter)

Sponsored

Last analyzed: 13 Feb 2026 at 12:30

Historical Analysis & Change Tracking