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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openclipart.org

https://openclipart.org· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

openclipart.org

Mobile

Sponsored

Hosting Provider

Linode (Akamai)

linode.com

IP Address

45.79.168.40

Server Location

🇺🇸 Cedar Knolls, United States

ASN

AS63949

Organization

Linode

Server

Nginx

Nameservers

fortaleza.ns.porkbun.com.maceio.ns.porkbun.com.salvador.ns.porkbun.com.curitiba.ns.porkbun.com.

Performance

Page Speed

3.4 MB

53 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

Infrastructure

Hosting

Linode (Akamai)

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

15 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Outbrain

CSS Frameworks

Analytics

Meta Frameworks

Libraries

Icon Libraries

Fonts

Payments

Web Servers

Languages

SEO Analysis

C61/100

openclipart.orgopenclipart.org

Openclipart - Clipping Culture

✂️ Openclipart is Original Free Clipart. 🖼️ Made by Real Artists.

Title Length30 chars

Recommended: 50-60 chars

Description Length65 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

5,764 URLs

robots.txt

2 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

74d

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

29.01.2026

Valid Until

29.04.2026

Subject Alternative Names (1)

openclipart.org

SHA-256 Fingerprint

97:C0:DF:F8:25:12:03:A1:2C:4F:F6:73:47:D8:DB:0B:76:AF:AC:C2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Cont...

access-control-allow-methods

GET, POST, OPTIONS

access-control-allow-origin

access-control-expose-headers

Content-Length,Content-Range

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.fabricatorz.org

Domain Information

openclipart.org

Domain Age

21y 10m

Created

08.04.2004

Expires

08.04.2026

Last Updated

18.11.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Legitimate interest basis mentioned

Typography & Readability

Open Sans + -apple-system

74/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

15/25

1.22x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Open Sans

Sans18px

Body Font

-apple-system

Sans14px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

18px

32px

24px

14px

Major Second

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Inconsistent alignment: Mix of left/center/right creates visual noise.

GGoogle Fonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(2)googletagmanager.com(2)local(2)fundingchoicesmessages.google.com(2)google-analytics.com(1)

Sponsored

Last analyzed: 14 Feb 2026 at 05:31

Historical Analysis & Change Tracking