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

grin.com

https://grin.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

grin.com

Mobile

Sponsored

Hosting Provider

Grin LAN

IP Address

212.18.11.52

Site Location

🇩🇪 München, Germanyvia schema_nap

Server Location

🇩🇪 Munich, Germany

ASN

AS8767

Organization

Grin LAN

Server

Nginx

Nameservers

ns1.dnsimple.com.ns2.dnsimple.com.ns3.dnsimple.com.ns4.dnsimple.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

573 ms10%

Speed Index

745 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

576 KB

97 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

vias-hello-childv1Custom

by Lars Hansen

Technology Stack

19 Technologies Detected

Plugins

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

Fonts

Analytics

Tag Managers

Web Servers

Languages

SEO Analysis

A+93/100

Meta Tags14/15

Content10/12

Headings8/8

Technical25/25

E-E-A-T7/7

Images4/7

Links4/5

URL5/5

Social5/5

Freshness4/4

Mobile4/4

Indexability3/3

grin.comgrin.com

GRIN Selfpublishing: Veröffentliche dein Buch, akademischen Text

GRIN: Über 260.000 akademischen Arbeiten aus allen Fachbereichen ✓ Jetzt eigenen Text hochladen oder dein Buch mit persönlichem Ansprechpartner veröffentlichen!

Title Length64 chars

Recommended: 50-60 chars (~378px / 580px)

Description Length160 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

95 URLs

95 sub-sitemaps

robots.txt

56 rules

Sitemap reference found

Local SEO

Local Search Readiness

47/100

Fair

13 9

Sponsored

AI & LLM Readiness

D47/100

Bot Access

10/25

Machine Read.

10/25

Schema Data

13/25

Citation

14/25

AI Bot Access

6/14 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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:3%

Words:826

Token eff.:Optimal

Structured Data

9 JSON-LD

Article×1.2(min)Person×1.3Organization×1.1WebSiteVideoObjectSearchAction

sameAs entity links

Citation Readiness

Opening Summary11w

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph2/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

77/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

20/20

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

Forms & Inputs

5/15

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

Color & Contrast

15/15

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

6/15

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

2 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.

70/100

71 mg

CO₂e / view

575.9 KB

Page Weight

80%

Cleaner Than

New Visitor

81 mg

Returning (cached)

41 mg

Annual (10K/mo)

8.5 kg

Emission Segments

Data Center

16 mg

Network

17 mg

Device

38 mg

Resource Breakdown

JavaScript

184.4 KB

Images

147.7 KB

CSS

178.0 KB

Fonts

20.9 KB

HTML

44.8 KB

Green Hosting Not Verified

Grin LAN

1 recommendation

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

21%Critical

Interactive

HTTPS

No WAF

167d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.03.2026

Valid Until

10.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.grin.comgrin.com

SHA-256 Fingerprint

F0:F0:D1:E4:86:FE:75:71:41:A0:2B:3F:50:F2:D8:B7:A5:E1:48:E4...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟢 1 Month(max-age=2592000)

content-encoding

📦 Gzip(gzip)

content-length

45530

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 20:34:40 GMT

expires

Mon, 25 May 2026 20:34:40 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

grin-com.mail.protection.outlook.com

Domain Information

grin.com

Domain Age

30y 7m

Created

03.10.1995

Expires

02.10.2029

Last Updated

03.08.2024

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

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.

79/100

Mobile Friendly4 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

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Barlow

WCAG Partial

69/100

Readability

/30

20/30

18px · LH 1.44

Hierarchy

/20

14/20

1.56x ratio · ✓ H1→H6

WCAG

/25

17/25

2.59:1 min contrast

Performance

/25

18/25

1 font · 4 req

Heading Font

Barlow

Sans28px

Body Font

Barlow

Sans18px

Contrast Ratio

2.59:1

27 issues

Reading Comfort

~36 CPL

Narrow lines

28px

40px

18px

Augmented Fourth

Scale

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.44 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 9/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 27 elements below WCAG AA threshold (min 2.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

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

Buy on MyFontsFlesch 9

Color Palette

7 unique colors

17.38:1 AAA Light

#ffffff

Background· 38.7%

#171b1a

Secondary· 6%

#bfb8ab

Primary· 7%

#d9e3dc

Secondary· 5.5%

#8baba8

Secondary· 5.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

grin.com(14)youtube.com(2)(1)dashboard.searchatlas.com(1)

Website Identity

GRIN

Organization

Du möchtest dein eigenes Buch veröffentlichen? Dann bist du bei uns genau richtig! Ob Romance, Fantasy, Sachbuch oder mehr – im klassischen Selfpublishing is...

info@grin.com

+49 89 550559-0

www.grin.com

30 years old

Waltherstr. 23, München

80337, München, Bayern

Location detected: 🇩🇪 Germany, Münchenvia schema_nap

Network Solutions, LLC📧 Microsoft 365de-DE

Social Profiles

Instagram

Sponsored

Last analyzed: 25 Apr 2026 at 20:35

Historical Analysis & Change Tracking