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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overdrive.com

https://overdrive.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

overdrive.com

Mobile

Sponsored

Hosting Provider

CONTINENTAL BROADBAND PENNSYLVANIA, INC.

IP Address

207.54.136.33

Server Location

🇺🇸 Pittsburgh, United States

ASN

AS17054

Organization

CONTINENTAL BROADBAND PENNSYLVANIA, INC.

CDN

Azure Cdn

Nameservers

ns1-05.azure-dns.com.ns2-05.azure-dns.net.ns3-05.azure-dns.org.ns4-05.azure-dns.info.

Performance

Page Speed

1.3 MB

76 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

CONTINENTAL BROADBAND PENNSYLVANIA, INC.

CDN

Azure Cdn

Technology Stack

3 Technologies Detected

Libraries

jQuery

Other

Modernizr

CSS Frameworks

Tailwind CSS

SEO Analysis

B72/100

overdrive.comoverdrive.com

OverDrive: Free ebooks, audiobooks & movies from your library.

Thousands of libraries & schools offer free digital content thru OverDrive's suite of products/services. Learn more about Libby, Kanopy, Sora & Teaching Books.

Title Length62 chars

Recommended: 50-60 chars

Description Length159 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

13 URLs

robots.txt

32 rules

Sitemap reference found

Sponsored

Security Score

66%Fair

Interactive

HTTPS

No WAF

43d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

29.12.2025

Valid Until

29.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.overdrive.comoverdrive.com

SHA-256 Fingerprint

9D:4A:DF:A2:E7:51:A8:E3:D5:9A:E8:7F:92:03:D2:44:69:94:C3:B8...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-encoding

📦 Gzip(gzip)

content-length

10890

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 23:21:53 GMT

permissions-policy

vr=(), midi=()

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mxb-0057c701.gslb.pphosted.com

mxa-0057c701.gslb.pphosted.com

Domain Information

overdrive.com

Domain Age

30 years

Created

18.02.1996

Expires

19.02.2027

Last Updated

21.01.2026

Registrar

eNom, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Data Protection Officer mentioned

Typography & Readability

FreightTextPro + LinetoBrown

79/100

Readability

/30

40/40

18px · LH 1.50

Hierarchy

/20

18/25

2.78x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

FreightTextPro

Sans50px

Body Font

LinetoBrown

Sans18px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

50px

37px

21px

17px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 38 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

16 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)fast.wistia.com(2)browser.sentry-cdn.com(1)

Website Identity

Facebook Instagram LinkedIn YouTube Bluesky

Sponsored

Last analyzed: 13 Feb 2026 at 23:22

Historical Analysis & Change Tracking