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

flowingdata.com

https://flowingdata.com· First analyzed 24 Apr 2026· Updated 24 Apr 2026

Export

flowingdata.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.67.107

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

iris.ns.cloudflare.com.lee.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.7 s10%

Speed Index

2.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.9 MB

65 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

FlowingData Modern 6.0.1v6.0.1Custom

by Nathan Yau

View Theme

Technology Stack

8 Technologies Detected

Plugins

Jetpack

Bbpress Sfwd Lms Advanced Responsive Video Embedder

Libraries

CSS Frameworks

CDN

SEO Analysis

C63/100

Meta Tags10/15

Content12/12

Headings3/8

Technical16/25

E-E-A-T3/7

Images3/7

Links2/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

flowingdata.comflowingdata.com

FlowingData - Data Visualization and Statistics

FlowingData

Title Length47 chars

Recommended: 50-60 chars (~276px / 580px)

Description Length11 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (23/33) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

7 rules

Sitemap reference found

Local SEO

Local Search Readiness

6/100

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

D41/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

11/25

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

blockquotes

Text ratio:10%

Words:2,803

Token eff.:Optimal

Sections/1K:3.9

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary41w

Descriptive Headingsavg 1.5w

Canonical URL

Open Graph3/3

Twitter Card0/3

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

9/20

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

3/15

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.

40/100

401 mg

CO₂e / view

3.9 MB

Page Weight

15%

Cleaner Than

New Visitor

459 mg

Returning (cached)

229 mg

Annual (10K/mo)

48.2 kg

Emission Segments

Data Center

20 mg

Network

118 mg

Device

264 mg

Resource Breakdown

JavaScript

53.7 KB

Images

3.7 MB

CSS

114.1 KB

HTML

25.4 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

25%Critical

Critical / Transactional

HTTPS

WAF

80d

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

Valid From

14.04.2026

Valid Until

13.07.2026

Subject Alternative Names (2)

*.flowingdata.comflowingdata.com

SHA-256 Fingerprint

31:B4:EF:B0:A4:86:4B:C5:C7:15:2D:09:2C:CC:26:D8:21:05:5F:FC...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

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

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9f10d3314d0b4daf-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Thu, 23 Apr 2026 23:59:57 GMT

Good Warning Issue

Email Infrastructure

Fastmail

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

in2.smtp.messagingengine.com

in1.smtp.messagingengine.com

Domain Information

flowingdata.com

Domain Age

20 years

Created

13.04.2006

Expires

13.04.2029

Last Updated

04.03.2026

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

65/100

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, user-scalable=yes

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Gotham SSm A + Mercury SSm A

WCAG Partial

77/100

Readability

/30

26/30

16px · LH 1.60

Hierarchy

/20

12/20

1.73x ratio

WCAG

/25

18/25

2.85:1 min contrast

Performance

/25

21/25

2 fonts

Heading Font

Gotham SSm A

Sans28px

Body Font

Mercury SSm A

Sans16px

Contrast Ratio

2.85:1

6 issues

Reading Comfort

~36 CPL

Narrow lines

28px

18px

13px

16px

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

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 2.9:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Buy on MyFontsFluid Type (rem)Flesch 46

Color Palette

10 unique colors

3.09:1 AA Large Light

#ffffff

Background· 70.80000000000001%

#9a9096

Other· 3.1%

#265bf6

Accent· 10.5%

#79cadb

Accent· 4.6%

#dbe6ec

Primary· 2.6%

#f4f0ec

Primary· 2.4%

#4c70d9

Accent· 1%

#2b48bd

Accent· 0.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

flowingdata.com(5)c0.wp.com(2)js.memberful.com(1)stats.wp.com(1)static.cloudflareinsights.com(1)

Website Identity

flowingdata.com

20 years old

Location detected: 🇨🇦 Canadavia ip

NameCheap, Inc.📧 Fastmailen

Social Profiles

X (Twitter)Instagram LinkedIn Bluesky

Sponsored

Last analyzed: 24 Apr 2026 at 00:00

Historical Analysis & Change Tracking