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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wissenschaft.de

https://wissenschaft.de· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

wissenschaft.de

Mobile

Sponsored

Hosting Provider

Hetzner

hetzner.com

IP Address

88.99.88.197

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Falkenstein, Germany

ASN

AS24940

Server

Nginx

Nameservers

anycast1.irondns.net.anycast2.irondns.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.7 s10%

Speed Index

2.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.5 MB

148 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Konradin Wissenschaft.dev1.4.2Custom

by Author URI:

View Theme

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

16 Technologies Detected

Plugins

Item Fontawesome Wp Pro Quiz Item Plenigo Item Bookmarks Meks Flexible Shortcodes

Analytics

Libraries

UI Components

CSS Frameworks

Icon Libraries

Tag Managers

Web Servers

Customer Support

SEO Analysis

C65/100

Meta Tags9/15

Content3/12

Headings0/8

Technical21/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness4/4

Mobile3/4

Indexability3/3

wissenschaft.dewissenschaft.de

wissenschaft.de

Aktuelle Nachrichten, Videos und Hintergrundberichte aus Wissenschaft und Forschung - Astronomie, Gesundheit, Biologie, Physik, Psychologie, Technik

Title Length15 chars

Recommended: 50-60 chars (~91px / 580px)

Description Length148 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (1 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

96 URLs

96 sub-sitemaps

robots.txt

8 rules

Local SEO

Local Search Readiness

12/100

Poor

4 12 1

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D41/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

4/25

Citation

10/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:2%

Words:1,592

Token eff.:Optimal

Structured Data

3 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph2/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

66/100

Passed

Critical

Warnings

Images & Alt Text

15/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

18/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

12/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

0/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

38/100

463 mg

CO₂e / view

4.5 MB

Page Weight

15%

Cleaner Than

New Visitor

529 mg

Returning (cached)

265 mg

Annual (10K/mo)

55.6 kg

Emission Segments

Data Center

23 mg

Network

136 mg

Device

304 mg

Resource Breakdown

JavaScript

173.9 KB

Images

3.9 MB

CSS

303.8 KB

HTML

64.3 KB

Other

300 B

Green Hosting Verified

Hetzner Online GmbH

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

21%Critical

Interactive

HTTPS

No WAF

48d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.03.2026

Valid Until

13.06.2026

Subject Alternative Names (1)

www.wissenschaft.de

SHA-256 Fingerprint

46:78:FC:C2:A5:30:E2:D3:79:2B:3C:32:34:2D:36:34:E2:CF:17:FF...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 15:33:35 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

k-cache

HIT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

wissenschaft-de.mail.protection.outlook.com

Domain Information

wissenschaft.de

Last Updated

24.01.2024

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

78/100

Mobile Friendly8 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width,initial-scale=1.0

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Open Sans

WCAG Partial

70/100

Readability

/30

16/30

14px · LH 1.64

Hierarchy

/20

17/20

2.86x ratio

WCAG

/25

19/25

1.11:1 min contrast

Performance

/25

18/25

1 font · 4 req

Heading Font

Open Sans

Sans40px

Body Font

Open Sans

Sans14px

Contrast Ratio

1.11:1

1 issue

Reading Comfort

~42 CPL

Narrow lines

40px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.1:1).

✅ Strong hierarchy: Headlines are 2.9x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFontsFlesch 43

Color Palette

12 unique colors

10.74:1 AAA Light

#ffffff

Background· 28.1%

#433c3e

Text· 9.3%

#eeeeee

Primary· 0%

#003399

Primary· 14.7%

#9c8b76

Secondary· 10.7%

#877663

Secondary· 8.8%

#5b4e43

Secondary· 7.9%

#7c96af

Secondary· 6.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

wissenschaft.de(11)cp.wissenschaft.de(1)local(1)gdpr-tcfv2.sp-prod.net(1)static.frisbii-media.com(1)

Website Identity

wissenschaft.de

Aktuelle Nachrichten, Videos und Hintergrundberichte aus Wissenschaft und Forschung - Astronomie, Gesundheit, Biologie, Physik, Psychologie, Technik

bdw@zenit-presse.de

www.wissenschaft.de/

Location detected: 🇩🇪 Germanyvia tld

📧 Microsoft 365de

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 25 Apr 2026 at 15:34

Historical Analysis & Change Tracking