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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seesaa.net

https://seesaa.net· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

seesaa.net

Mobile

Sponsored

Hosting Provider

Oracle Cloud

oracle.com/cloud

IP Address

138.2.21.1

Server Location

🇯🇵 Tokyo, Japan

ASN

AS31898

Organization

Oracle Cloud Infrastructure (ap-tokyo-1)

Nameservers

ns-818.awsdns-38.net.ns-1159.awsdns-16.org.ns-1993.awsdns-57.co.uk.ns-61.awsdns-07.com.

Performance

Page Speed

867 KB

53 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Oracle Cloud

Technology Stack

11 Technologies Detected

Advertising

Google Ads Criteo Outbrain

Icon Libraries

Font Awesome Material Icons

Analytics

Libraries

CSS Frameworks

Fonts

Payments

SEO Analysis

D58/100

seesaa.netseesaa.net

Seesaaブログ（シーサー）：無料でアフィリエイトからまとめブログまで

Seesaaブログはいろいろな機能がつまった無料ブログサービスです。まとめブログ、アフィリエイトなどさまざまなブログを見つけてください。

Title Length36 chars

Recommended: 50-60 chars

Description Length68 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (7/8)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

22 rules

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

72d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

26.01.2026

Valid Until

26.04.2026

Subject Alternative Names (12)

*.blog.seesaa.jp*.gurume.net*.iiblog.jp*.ryokou.me*.seesaa.blog*.seesaa.net*.seesaa.space*.sokuho.org+4 more

SHA-256 Fingerprint

17:2B:6A:D9:AE:CB:D7:83:82:0F:0D:F9:F7:79:1D:7B:6C:7B:29:14...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-type

text/html

date

Fri, 13 Feb 2026 00:36:08 GMT

etag

W/"698e70a4-7da7"

last-modified

Fri, 13 Feb 2026 00:30:28 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mx.seesaa.net

Domain Information

seesaa.net

Domain Age

22y 3m

Created

24.10.2003

Expires

24.10.2026

Last Updated

27.08.2025

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Legitimate interest basis mentioned

Typography & Readability

Hiragino Kaku Gothic ProN

66/100

Readability

/30

20/40

13px · LH 1.40

Hierarchy

/20

25/25

2.31x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Hiragino Kaku Gothic ProN

Sans30px

Body Font

Hiragino Kaku Gothic ProN

Sans13px

Contrast Ratio

Reading Comfort

~62 CPL

Optimal (45–75)

30px

22px

16px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.40 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.3x 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.

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

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

fundingchoicesmessages.google.com(2)googletagservices.com(1)ajax.googleapis.com(1)local(1)googletagmanager.com(1)

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Last analyzed: 13 Feb 2026 at 00:36

Historical Analysis & Change Tracking