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

merrell.com

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

Export

merrell.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.164.68.15

Site Location

🇺🇸 Rockford, United Statesvia schema_nap

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-231.awsdns-28.com.ns-772.awsdns-32.net.ns-1101.awsdns-09.org.ns-2027.awsdns-61.co.uk.

Performance

Core Web Vitals

Weight

First Contentful Paint

855 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

9.4 MB

191 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Technology Stack

18 Technologies Detected

Libraries

CSS Frameworks

Fonts

Google Fonts Adobe Fonts (Typekit)Adobe Fonts

Analytics

Payments

Tag Managers

Other

CDN

Security

SEO Analysis

B75/100

Meta Tags15/15

Content6/12

Headings3/8

Technical24/25

E-E-A-T2/7

Images6/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile1/4

Indexability3/3

merrell.commerrell.com

Merrell Official: Top Rated Hiking Footwear & Outdoor Gear

Official Merrell Site - Shop outdoor footwear & apparel in hiking, running, & casual styles to equip you for your active lifestyle. Free shipping!

Title Length58 chars

Recommended: 50-60 chars (~356px / 580px)

Description Length146 chars

Recommended: 120-160 chars

Issues (1)

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

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,053 URLs

robots.txt

58 rules

Sitemap reference found

Local SEO

Local Search Readiness

39/100

Needs Work

11 10

Sponsored

AI & LLM Readiness

D43/100

Bot Access

24/25

Machine Read.

7/25

Schema Data

3/25

Citation

9/25

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:1%

Words:1,566

Token eff.:Optimal

Structured Data

1 JSON-LD

Organization×1.1

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headingsavg 1.8w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

Upgrade to view recommendations

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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.

81/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

11/20

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

Forms & Inputs

15/15

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

13/15

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

ARIA & Roles

9/15

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

1 recommendation

•Accessibility recommendation preview...

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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

967 mg

CO₂e / view

9.4 MB

Page Weight

Cleaner Than

New Visitor

1.11 g

Returning (cached)

553 mg

Annual (10K/mo)

116.0 kg

Emission Segments

Data Center

47 mg

Network

284 mg

Device

636 mg

Resource Breakdown

JavaScript

730.4 KB

Images

7.8 MB

CSS

753.9 KB

HTML

87.5 KB

Other

17.6 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

8 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

20%Critical

Critical / Transactional

HTTPS

WAF

42d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.03.2026

Valid Until

07.06.2026

Subject Alternative Names (1)

www.merrell.com

SHA-256 Fingerprint

98:32:0B:AE:79:8B:51:77:34:EC:69:8E:02:BB:1B:17:E1:90:2C:11...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

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

cf-cache-status

DYNAMIC

cf-ray

9f208f27dc4e3418-EWR

content-encoding

⚡ Brotli(br)

content-security-policy

default-src 'self' ; media-src 'self' *.amazonaws.com ; sc...

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

merrell-com.mail.protection.outlook.com

Domain Information

merrell.com

Domain Age

31y 2m

Created

20.02.1995

Expires

21.02.2027

Last Updated

17.02.2026

Registrar

CSC Corporate Domains, Inc.

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.

79/100

Mobile Friendly329 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

Denim Ink WD

WCAG Partial

66/100

Readability

/30

22/30

16px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

18/25

1:1 min contrast

Performance

/25

18/25

1 font · 5 req

Heading Font

Denim Ink WD

Sans

Body Font

Denim Ink WD

Sans16px

Contrast Ratio

1:1

15 issues

Reading Comfort

~39 CPL

Narrow lines

76px

100px

20px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 1.0:1).

❌ 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).

AAdobe Fonts Buy on MyFontsFluid Type (rem)Flesch 41

Color Palette

15 unique colors

17.77:1 AAA Light

#ffffff

Background· 15.399999999999999%

#181817

Text· 7%

#82b6b9

Primary· 9.5%

#c69766

Secondary· 9%

#deb98c

Accent· 8.5%

#058ea2

Accent· 8.4%

#996d48

Secondary· 6.7%

#4babba

Secondary· 5.5%

Business & Marketing Stack

5 Tools Detected

Enterprise

Customer Support

LiveChatMid-Market

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

Pinterest WidgetsFree

Social widgets and sharing tools

A/B Testing & Optimization

ConvertMid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)googletagmanager.com(6)edge.curalate.com(1)assets.pinterest.com(1)rum-static.pingdom.net(1)

Website Identity

Wolverine World Wide, Inc.

Organization

wwwcommunications@wwwinc.com

+8002883124

www.wolverineworldwide.com/

31 years old

9341 Courtland Dr NE, Rockford

49351, Rockford, MI

Location detected: 🇺🇸 United States, Rockfordvia schema_nap

CSC Corporate Domains, Inc.📧 Microsoft 365en-us

Social Profiles

Facebook Instagram YouTube TikTok

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Last analyzed: 25 Apr 2026 at 21:50

Historical Analysis & Change Tracking