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

iso.org

https://iso.org· First analyzed 10 Feb 2026· Updated 10 Feb 2026

Export

iso.org

Mobile

Sponsored

Hosting Provider

ISO

IP Address

138.81.35.132

Server Location

🇨🇭 Vernier, Switzerland

ASN

AS3303

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1-37.azure-dns.com.ns2-37.azure-dns.net.ns3-37.azure-dns.org.ns4-37.azure-dns.info.

Performance

Page Speed

333 KB

28 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

Infrastructure

Hosting

ISO

CDN

Cloudflare

Technology Stack

6 Technologies Detected

Analytics

Libraries

CSS Frameworks

Advertising

CDN

SEO Analysis

B70/100

iso.orgiso.org

ISO - International Organization for Standardization

We're ISO, the International Organization for Standardization. We develop and publish International Standards.

Title Length52 chars

Recommended: 50-60 chars

Description Length110 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (9/10)

3 issues found

Upgrade to view details

Sponsored

Security Score

41%Poor

Interactive

HTTPS

WAF

56d

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, no-store, must-revalidate, proxy-revalidate, max-a...)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cbe72000d06d378-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=UTF-8

date

Tue, 10 Feb 2026 20:44:35 GMT

Good Warning Issue

Typography & Readability

Inter var ISO

62/100

Readability

/30

25/40

27px · LH 1.19

Hierarchy

/20

16/25

1.88x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter var ISO

Sans50px

Body Font

Inter var ISO

Sans27px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

50px

36px

30px

27px

✅ Excellent readability: 27px body text is ideal for all devices.

⚠️ Tight line spacing (1.19). Consider 1.4-1.6 for better readability.

✅ Good hierarchy: Clear distinction between headlines and 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.

Buy on MyFontsVariable Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

ActiveCampaignMid-Market

Email marketing and automation platforms

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)diffuser-cdn.app-us1.com(1)cdn.matomo.cloud(1)googletagmanager.com(1)iso.matomo.cloud(1)

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Last analyzed: 10 Feb 2026 at 20:44

Historical Analysis & Change Tracking