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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kark.com

https://kark.com· First analyzed 26 Apr 2026· Updated 26 Apr 2026

Export

kark.com

Mobile

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.129.91

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

Server

Nginx

CDN

Fastly

Nameservers

dns1.cscdns.net.dns2.cscdns.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

567 ms10%

Speed Index

737 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.5 MB

173 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.8.5

cms

Nexstarv1.5Custom

by Alley

View Theme

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

30 Technologies Detected

Plugins

Universal Data Layer Login Registration Video Onesignal Lakana Carousel Nexstar Sailthru Newsletter Nexstar Video Auth Sailthru Widget Core Nxst Advertising Nexstar Video Ads Shim Nielsen Htlbid Search Guard Nexstar Onetrust

Analytics

CSS Frameworks

Advertising

Google Ads Snapchat Pixel

Libraries

Fonts

Tag Managers

Payments

Comments

Web Servers

SEO Analysis

B71/100

Meta Tags11/15

Content3/12

Headings6/8

Technical21/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile4/4

Indexability3/3

kark.comkark.com

Little Rock News & Weather | Little Rock, AR | KARK

KARK is your source for local weather, news and sports.

Title Length51 chars

Recommended: 50-60 chars (~306px / 580px)

Description Length55 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (11 words). Search engines need substantial content for ranking.
• Most images missing alt text (94/116) — critical for accessibility and SEO

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

56 URLs

56 sub-sitemaps

robots.txt

106 rules

Sitemap reference found

Local SEO

Local Search Readiness

13/100

Poor

4 13 1

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

Sponsored

AI & LLM Readiness

F28/100

Bot Access

10/25

Machine Read.

7/25

Schema Data

7/25

Citation

4/25

AI Bot Access

4/14 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:2,287

Token eff.:Optimal

Structured Data

2 JSON-LD

Organization×1.1WebSiteSearchAction

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

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.

78/100

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

10/15

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

2/15

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

1 recommendation

•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.

59/100

151 mg

CO₂e / view

1.5 MB

Page Weight

60%

Cleaner Than

New Visitor

173 mg

Returning (cached)

87 mg

Annual (10K/mo)

18.2 kg

Emission Segments

Data Center

7 mg

Network

45 mg

Device

100 mg

Resource Breakdown

Images

1.1 MB

CSS

209.4 KB

Fonts

2.8 KB

HTML

136.1 KB

Green Hosting Verified

Axis12 Ltd

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

56d

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

24.03.2026

Valid Until

22.06.2026

Subject Alternative Names (1)

*.kark.com

SHA-256 Fingerprint

51:B1:69:A4:E1:C5:B7:59:29:0D:61:B6:95:80:7C:DD:3B:05:8F:47...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🟡 300s(max-age=300, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-security-policy

script-src 'nonce-06bcc0b5'; script-src https://www.kark.com...

content-type

text/html; charset=UTF-8

date

Sun, 26 Apr 2026 00:18:11 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

kark-com.mail.protection.outlook.com

Domain Information

kark.com

Domain Age

31 years

Created

10.04.1995

Expires

11.04.2027

Last Updated

07.04.2026

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.

78/100

Mobile Friendly184 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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Source Sans Pro

WCAG Partial

73/100

Readability

/30

23/30

16px · LH 1.30

Hierarchy

/20

18/20

2.56x ratio

WCAG

/25

16/25

1:1 min contrast

Performance

/25

16/25

3 fonts · 3 req

Heading Font

Source Sans Pro

Sans41px

Body Font

Source Sans Pro

Sans16px

Contrast Ratio

1:1

25 issues

Reading Comfort

Single Font Family

left aligned

41px

23px

28px

20px

16px

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

⚠️ Tight line spacing (1.30). Increase to 1.4–1.6 for better readability.

⚠️ Hard to read: Flesch score 38/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 25 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

GGoogle FontsFluid Type (rem)Flesch 39

Color Palette

5 unique colors

3.35:1 AA Large Dark

#1c1c1c

Text· 70.30000000000001%

#6e6f66

Other· 8.8%

#c2c7a9

Primary· 7.3%

#4d443e

Text· 6.9%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

kark.com(5)cdn.cookielaw.org(3)static.chartbeat.com(3)segment.psg.nexstardigital.net(2)local(1)

Website Identity

KARK

NewsMediaOrganization

KARK is your source for local weather, news and sports.

arkansasmatters@kark.com

www.kark.com/

31 years old

Location detected: 🇨🇦 Canadavia ip

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

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 26 Apr 2026 at 00:18

Historical Analysis & Change Tracking