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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nfib.com

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

Export

nfib.com

Mobile

Sponsored

Hosting Provider

Kinsta

cloudflare.com

IP Address

162.159.134.42

Site Location

🇺🇸 United Statesvia phone

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns2-07.azure-dns.net.ns3-07.azure-dns.org.ns4-07.azure-dns.info.ns1-07.azure-dns.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

548 ms10%

Speed Index

712 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

128 KB

114 requests

Image Optimization

AVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Tailwind CSS

CMS

WordPressv6.9.4

Infrastructure

Hosting

Kinsta

CDN

Cloudflare

Technology Stack

14 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Microsoft Clarity

Advertising

Google Ads Snapchat Pixel Microsoft Advertising

CSS Frameworks

Libraries

UI Components

Tag Managers

CDN

Plugins

All In One Seo Pack Pro

SEO Analysis

A80/100

Meta Tags15/15

Content8/12

Headings3/8

Technical24/25

E-E-A-T2/7

Images2/7

Links5/5

URL5/5

Social5/5

Freshness4/4

Mobile4/4

Indexability3/3

nfib.comnfib.com

NFIB - Small Business Association - Advocate for Owners

NFIB is the voice of small business, advocating on behalf of America’s small and independent business owners, both in Washington, D.C. and each state capital.

Title Length55 chars

Recommended: 50-60 chars (~336px / 580px)

Description Length158 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (77/79) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

11 URLs

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

34/100

Needs Work

8 11 1

Sponsored

AI & LLM Readiness

D57/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

9/25

Citation

18/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:3%

Words:1,057

Token eff.:Optimal

Structured Data

5 JSON-LD

Organization×1.1WebSiteLocalBusiness×1.1BreadcrumbList

sameAs entity links

Citation Readiness

Opening Summary26w

Descriptive Headingsavg 11w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

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.

67/100

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

7/15

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.

4 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.

69/100

A+

13 mg

CO₂e / view

128.3 KB

Page Weight

95%

Cleaner Than

New Visitor

15 mg

Returning (cached)

7 mg

Annual (10K/mo)

1.6 kg

Emission Segments

Data Center

<0.001 g

Network

4 mg

Device

9 mg

Resource Breakdown

JavaScript

33.3 KB

Images

63.5 KB

HTML

24.8 KB

Other

6.6 KB

Green Hosting Verified

Something Familiar

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

46%Poor

Interactive

HTTPS

WAF

36d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

27.02.2026

Valid Until

28.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

nfib.com*.nfib.com

SHA-256 Fingerprint

22:A3:22:1D:F9:49:D0:16:8A:33:05:85:4E:B3:61:D9:1D:07:A5:A2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9f06cb794abd9b46-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Wed, 22 Apr 2026 18:47:04 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

nfib-com.mail.protection.outlook.com

Domain Information

nfib.com

Domain Age

27y 1m

Created

09.03.1999

Expires

15.12.2027

Last Updated

16.10.2022

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

71/100

Mobile Friendly1 breakpoint

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

Gotham

WCAG Partial

57/100

Readability

/30

17/30

14px · LH 1.43

Hierarchy

/20

8/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

15/25

1 font · 2 req

Heading Font

Gotham

Sans

Body Font

Gotham

Sans14px

Contrast Ratio

1:1

4 issues

Reading Comfort

~39 CPL

Narrow lines

24px

36px

14px

Perfect Fifth

Scale

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 23/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.0:1).

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

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

Buy on MyFontsFlesch 23

Color Palette

8 unique colors

12.63:1 AAA Dark

#333333

Text· 31.799999999999997%

#ffffff

Text· 11.5%

#040304

Text· 11.5%

#101117

Secondary· 11.1%

#dae8e1

Secondary· 2.8%

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Microsoft AdsEnterprise

Snapchat PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(5)connect.facebook.net(5)clarity.ms(3)tr.snapchat.com(1)scripts.clarity.ms(1)

Website Identity

Small Business Association - Advocate for Owners

LocalBusiness

NFIB is the voice of small business, advocating on behalf of America’s small and independent business owners, both in Washington, D.C. and each state capital.

+18006342669

www.nfib.com/

27 years old

Location detected: 🇺🇸 United Statesvia phone

Network Solutions, LLC📧 Microsoft 365en-US

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 22 Apr 2026 at 18:47

Historical Analysis & Change Tracking