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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peterlang.com

https://peterlang.com· First analyzed 22 Apr 2026· Updated 22 Apr 2026

Export

peterlang.com

Mobile

Sponsored

Hosting Provider

Grin LAN

IP Address

212.18.11.52

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Munich, Germany

ASN

AS8767

Organization

Grin LAN

Server

Nginx

Nameservers

pdns10.domaincontrol.com.pdns09.domaincontrol.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

691 ms10%

Speed Index

898 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.3 MB

64 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.1

cms

Technology Stack

12 Technologies Detected

Analytics

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Plugins

CSS Frameworks

Tag Managers

Marketing

Web Servers

SEO Analysis

B78/100

Meta Tags9/15

Content11/12

Headings3/8

Technical24/25

E-E-A-T3/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile4/4

Indexability3/3

peterlang.competerlang.com

Home - Peter Lang

Discover a world of scholarly publications at Peter Lang. Discover a vast collection of books and journals across diverse disciplines.

Title Length17 chars

Recommended: 50-60 chars (~108px / 580px)

Description Length134 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

6 URLs

6 sub-sitemaps

robots.txt

9 rules

Sitemap reference found

Local SEO

Local Search Readiness

24/100

Needs Work

7 10 1

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

4/25

Citation

14/25

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

navheader/footer

Text ratio:7%

Words:804

Token eff.:Optimal

Sections/1K:11.2

Depth:2/5

Structured Data

3 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary213w

Descriptive Headingsavg 3.7w

Canonical URL

Open Graph2/3

Twitter Card1/3

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.

60/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

13/20

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

9/15

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

ARIA & Roles

3/15

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

5 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.

27/100

288 mg

CO₂e / view

2.3 MB

Page Weight

50%

Cleaner Than

New Visitor

329 mg

Returning (cached)

164 mg

Annual (10K/mo)

34.5 kg

Emission Segments

Data Center

64 mg

Network

69 mg

Device

154 mg

Resource Breakdown

JavaScript

773.8 KB

Images

1.0 MB

CSS

376.6 KB

HTML

14.2 KB

Other

100.6 KB

Green Hosting Not Verified

Grin LAN

7 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

No WAF

67d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

31.03.2026

Valid Until

29.06.2026

Subject Alternative Names (2)

ams.peterlang.comwww.peterlang.com

SHA-256 Fingerprint

CC:68:3A:45:35:DF:ED:4E:9A:0B:0E:60:62:D4:6A:D7:3F:65:47:3B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Wed, 22 Apr 2026 17:49:16 GMT

link

<https://www.peterlang.com/wp-json/>; rel="https://api.w.org...

server

nginx/1.24.0 (Ubuntu)

vary

Accept-Encoding

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (6)

alt1.aspmx.l.google.com

peterlang-com.mail.protection.outlook.com

alt2.aspmx.l.google.com

aspmx.l.google.com

+2 more

Domain Information

peterlang.com

Domain Age

30y 3m

Created

11.01.1996

Expires

16.06.2030

Last Updated

09.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

64/100

Mobile Friendly15 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, shrink-to-fit=no, maximum-scale=1, user-scalable=0

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

program

WCAG Partial

62/100

Readability

/30

20/30

16px · LH 1.63

Hierarchy

/20

8/20

WCAG

/25

18/25

1.66:1 min contrast

Performance

/25

16/25

1 font

Heading Font

program

Sans

Body Font

program

Sans16px

Contrast Ratio

1.66:1

7 issues

Reading Comfort

~44 CPL

Narrow lines

40px

30px

21px

16px

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

❌ Very complex text: Flesch score 1/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 7 elements below WCAG AA threshold (min 1.7:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

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

AAdobe Fonts Buy on MyFontsFluid Type (rem)Flesch 1

Color Palette

11 unique colors

5.34:1 AA Light

#ffffff

Background· 59.6%

#686a7b

Secondary· 2.8%

#90a6a0

Secondary· 6.4%

#2e2274

Primary· 5.5%

#111649

Accent· 4.9%

#cd2c3a

Accent· 4.3%

#f3e6de

Secondary· 3.8%

#3c325b

Secondary· 3.6%

Business & Marketing Stack

6 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

HotjarMid-Market

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

maps.googleapis.com(3)connect.facebook.net(2)googletagmanager.com(2)youtube.com(2)peterlang.com(2)

Website Identity

Home - Peter Lang

Discover a world of scholarly publications at Peter Lang. Discover a vast collection of books and journals across diverse disciplines.

www.peterlang.com/

30 years old

Location detected: 🇩🇪 Germanyvia ip

GoDaddy.com, LLC📧 Google Workspaceen-GB

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 22 Apr 2026 at 17:49

Historical Analysis & Change Tracking