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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viaf.org

https://viaf.org· First analyzed 26 Apr 2026· Updated 26 Apr 2026

Export

viaf.org

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.43.23

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

nico.ns.cloudflare.com.michelle.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

264 ms10%

Speed Index

343 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

114 KB

211 requests

Image Optimization

Lazy LoadResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Styling

Tailwind CSS

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

7 Technologies Detected

CSS Frameworks

Analytics

Meta Frameworks

Tag Managers

CDN

SEO Analysis

D46/100

Meta Tags9/15

Content3/12

Headings1/8

Technical11/21

E-E-A-T0/7

Images6/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

viaf.orgviaf.org

VIAF

The VIAF® (Virtual International Authority File) combines multiple name authority files into a single OCLC-hosted name authority service.

Title Length4 chars

Recommended: 50-60 chars (~22px / 580px)

Description Length137 chars

Recommended: 120-160 chars

Issues (1)

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

11 issues found

Upgrade to view details

Local SEO

Local Search Readiness

5/100

Poor

2 13 2

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

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

7/25

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:367

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary63w

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 (11)

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

13/20

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

7/15

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

ARIA & Roles

4/15

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

3 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.

76/100

A+

12 mg

CO₂e / view

113.9 KB

Page Weight

95%

Cleaner Than

New Visitor

13 mg

Returning (cached)

7 mg

Annual (10K/mo)

1.4 kg

Emission Segments

Data Center

<0.001 g

Network

3 mg

Device

8 mg

Resource Breakdown

HTML

18.7 KB

Other

95.2 KB

Green Hosting Verified

Cloudflare

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

WAF

60d

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

Valid From

28.03.2026

Valid Until

26.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

viaf.org*.viaf.org

SHA-256 Fingerprint

85:79:5E:2D:5A:2F:4F:7A:E0:9E:9B:63:68:F3:FB:20:64:D2:5A:9F...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray

9f272da57dfa2157-SJC

content-encoding

📦 Gzip(gzip)

content-type

text/html;charset=utf-8

date

Sun, 26 Apr 2026 17:06:29 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

viaf.org

Domain Age

19y 9m

Created

01.08.2006

Expires

01.08.2027

Last Updated

07.06.2025

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

73/100

Mobile Friendly

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

Arial

WCAG AAA

68/100

Readability

/30

16/30

14px · LH 1.43

Hierarchy

/20

8/20

WCAG

/25

24/25

17.93:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Body Font

Arial

Sans14px

Contrast Ratio

17.93:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines

14px

⚠️ 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 0/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 17.9:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 0

Color Palette

5 unique colors

Light

#ffffff

Background· 89.20000000000002%

#b2c3db

Primary· 3.6%

#d2dfea

Secondary· 2.4%

#969cad

Secondary· 2.1%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(19)googletagmanager.com(1)

Website Identity

viaf.org

bibchange@oclc.org

19 years old

Location detected: 🇨🇦 Canadavia ip

Network Solutions, LLCen

Sponsored

Last analyzed: 26 Apr 2026 at 17:07

Historical Analysis & Change Tracking