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

linuxjournal.com

https://linuxjournal.com· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

linuxjournal.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

204.68.111.25

Server Location

🇺🇸 Los Angeles, United States

ASN

AS209242

Organization

American Internet Services, LLC.

Server

Nginx

Nameservers

ns41.constellix.net.ns51.constellix.net.ns61.constellix.net.ns11.constellix.com.+2 more

Performance

Page Speed

1.3 MB

90 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Cloudflare

Detected API Sources

https://api.b2c.com/api/noscri...

Technology Stack

7 Technologies Detected

CSS Frameworks

Libraries

Icon Libraries

Analytics

Comments

Web Servers

SEO Analysis

F35/100

linuxjournal.comlinuxjournal.com

Home | Linux Journal

No description available for this page.

Title Length20 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

7 URLs

robots.txt

45 rules

Sponsored

Security Score

61%Fair

Interactive

HTTPS

No WAF

38d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp384r1) (384 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

25.12.2025

Valid Until

25.03.2026

Subject Alternative Names (2)

linuxjournal.comwww.linuxjournal.com

SHA-256 Fingerprint

A2:FA:C6:20:A4:D9:2A:01:24:49:A8:64:D1:56:91:F3:E6:38:66:77...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

connection

keep-alive

content-type

text/html; charset=UTF-8

date

Sat, 14 Feb 2026 10:12:15 GMT

server

nginx

transfer-encoding

chunked

x-frame-options

SameOrigin, SAMEORIGIN

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

aspmx2.googlemail.com

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

linuxjournal.com

Domain Age

32y 1m

Created

13.01.1994

Expires

12.01.2027

Last Updated

13.01.2026

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

Lateef + Helvetica Neue

68/100

Readability

/30

20/40

13px · LH 1.43

Hierarchy

/20

18/25

3.54x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Lateef

Sans46px

Body Font

Helvetica Neue

Sans13px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

46px

40px

24px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.5x larger than body text.

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

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

⚠️ Cramped layout: 12 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Matomo (Piwik)Mid-Market

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(11)d.delivery.consentmanager.net(3)cdn.consentmanager.net(2)gstatic.com(1)google.com(1)

Website Identity

linuxjournal.com

32 years old

GoDaddy.com, LLC📧 Google Workspace

Social Profiles

Facebook X (Twitter)

Sponsored

Last analyzed: 14 Feb 2026 at 10:12

Historical Analysis & Change Tracking