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

iza.org

https://iza.org· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

iza.org

Sponsored

Hosting Provider

Rheinische Friedrich-Wilhelms-Universitaet Bonn

IP Address

131.220.86.90

Server Location

🇩🇪 Bonn, Germany

ASN

AS680

Organization

Rheinische Friedrich-Wilhelms-Universitaet Bonn

Nameservers

name-server.iza.org.dns2.uni-bonn.de.dns1.uni-bonn.de.cl1.iza.org.+1 more

Performance

Page Speed

3.7 MB

24 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Technology Stack

5 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

SEO Analysis

D56/100

iza.orgiza.org

IZA | IZA - Institute of Labor Economics

Welcome to the IZA website

Title Length57 chars

Recommended: 50-60 chars

Description Length26 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

265d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Deutsche Telekom Security GmbH

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

04.11.2025

Valid Until

08.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.iza.orgiza.org

SHA-256 Fingerprint

C9:A0:21:BB:24:9C:6D:ED:39:37:93:2D:F3:0D:21:D3:BC:89:B0:F3...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

cache-control

🔴 No Cache(no-cache, private)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self' *.iza.org;

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 17:44:41 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

esa3.rhrz.uni-bonn.de

esa2.rhrz.uni-bonn.de

esa1.rhrz.uni-bonn.de

Domain Information

iza.org

Domain Age

27y 11m

Created

13.03.1998

Expires

12.03.2027

Last Updated

12.02.2026

Registrar

Deutsche Telekom AG

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Typography & Readability

Delivery

74/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Delivery

Sans

Body Font

Delivery

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

40px

20px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

4 Resources

Scripts

Styles

Async

Defer

Top Script Sources

static.iza.org(1)googletagmanager.com(1)local(1)

Website Identity

X (Twitter)

Sponsored

Last analyzed: 16 Feb 2026 at 17:44

Historical Analysis & Change Tracking