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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debenhams.com

https://debenhams.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

debenhams.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

76.223.34.124

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

CloudFront

CDN

CloudFront

Nameservers

ns-2032.awsdns-62.co.uk.ns-350.awsdns-43.com.ns-571.awsdns-07.net.ns-1156.awsdns-16.org.

Performance

Page Speed

1.6 MB

295 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity

Advertising

Google Ads Snapchat Pixel

Frameworks

CSS Frameworks

Tag Managers

Other

CDN

SEO Analysis

A+94/100

debenhams.comdebenhams.com

Fashion, Home & Beauty | Debenhams

Discover fashion for women, men and kids, as well as homeware and beauty must-haves at Debenhams.

Title Length34 chars

Recommended: 50-60 chars

Description Length97 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

50 rules

Sitemap reference found

Sponsored

Security Score

71%Good

Interactive

HTTPS

WAF

196d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.08.2025

Valid Until

03.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

debenhams.comrefresh.debenhams.comwww.debenhams.com

SHA-256 Fingerprint

BA:95:10:A5:2A:22:06:B9:D4:92:4E:09:D0:71:8A:16:88:3A:85:D2...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache="Set-Cookie", max-age=900, stale-while-revalidate=6...)

content-encoding

⚡ Brotli(br)

content-security-policy

default-src 'self'; img-src data: * blob: *; media-src *; sc...

content-type

text/html

date

Thu, 19 Feb 2026 21:58:35 GMT

server

CloudFront

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

debenhams-com.mail.protection.outlook.com

Domain Information

debenhams.com

Domain Age

28y 3m

Created

13.11.1997

Expires

12.11.2026

Last Updated

13.11.2025

Registrar

SafeNames Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Geologica

71/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Geologica

Sans16px

Body Font

Geologica

Sans16px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

16px

24px

Perfect Fifth

Scale

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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 MyFonts

Business & Marketing Stack

10 Tools Detected

Enterprise

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Snapchat PixelMid-Market

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookieYesSMB

OneTrustEnterprise

Cookie consent and privacy compliance tools

Affiliate & Partnerships

AWINMid-Market

Affiliate networks and partner tracking

A/B Testing & Optimization

AB TastyMid-Market

Experimentation and conversion optimization

Reviews & Social Proof

BazaarvoiceEnterprise

Customer reviews and testimonials

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdns.brsrvr.com(1)scripts.clarity.ms(1)clarity.ms(1)tags.creativecdn.com(1)assets.revlifter.io(1)

Website Identity

Facebook Instagram YouTube TikTok

Sponsored

Last analyzed: 19 Feb 2026 at 21:59

Historical Analysis & Change Tracking