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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charter.net

https://charter.net· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

charter.net

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

75.2.77.94

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

AmazonS3

CDN

CloudFront

Nameservers

ns3.charter.com.ns4.charter.com.ns1.charter.com.ns2.charter.com.

Performance

Page Speed

6.1 MB

67 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Angular

CMS

Drupal

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

3 Technologies Detected

Frameworks

Angularv17.3.12

Libraries

jQueryv3.5.0

CSS Frameworks

Tailwind CSS

SEO Analysis

D58/100

charter.netcharter.net

Spectrum Account Sign-In & Bill Pay | Spectrum

Title Length46 chars

Recommended: 50-60 chars

Description Length119 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (5/7)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

17 rules

Sitemap reference found

Sponsored

Security Score

86%Very Good

Static / Informational

HTTPS

WAF

84d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

16.04.2025

Valid Until

15.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.spectrum.net*.stage-spectrum.net

SHA-256 Fingerprint

02:7F:60:3E:4A:2B:92:04:0D:91:7A:C8:D8:BA:9F:C0:B2:24:95:AF...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

cache-control

🟡 0s(max-age=0)

content-encoding

⚡ Brotli(br)

content-security-policy

frame-ancestors 'self'

content-type

text/html

date

Fri, 20 Feb 2026 00:40:47 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mx0.charter.net

Domain Information

charter.net

Domain Age

28y 6m

Created

08.08.1997

Expires

07.08.2026

Last Updated

03.08.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

-apple-system

84/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

18/25

2.25x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

-apple-system

Sans36px

Body Font

-apple-system

Sans16px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

36px

20px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

tags.tiqcdn.com(4).(4)p11.techlab-cdn.com(4)collector-8649.tvsquared.com(1)code.jquery.com(1)

Website Identity

charter.net

28 years old

CSC Corporate Domains, Inc.

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 20 Feb 2026 at 00:41

Historical Analysis & Change Tracking