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

powells.com

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

Export

powells.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.66.165.200

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sara.ns.cloudflare.com.dion.ns.cloudflare.com.

Performance

Page Speed

1.6 MB

122 requests

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Styling

Tailwind CSS

CMS

Ghost

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

11 Technologies Detected

Meta Frameworks

Nuxt.js Gatsby Astro

CSS Frameworks

Tailwind CSS

Chakra UI Material UI

Icon Libraries

Analytics

Tag Managers

Advertising

CDN

SEO Analysis

D58/100

powells.compowells.com

Powell's Books | The World's Largest Independent Bookstore

The Legendary Independent Bookstore

Title Length58 chars

Recommended: 50-60 chars

Description Length35 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (28/41)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

1 rules

Allows all crawlers

Sponsored

Security Score

36%Critical

Interactive

HTTPS

WAF

39d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

25.12.2025

Valid Until

25.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

powells.com*.powells.com

SHA-256 Fingerprint

80:46:93:9D:A1:BB:58:6C:6C:B1:EA:02:84:54:1C:BA:54:95:43:9C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Sat, 14 Feb 2026 01:29:43 GMT

content-type

text/html;charset=utf-8

vary

Accept-Encoding

x-robots-tag

index, follow, max-image-preview:large, max-snippet:-1, max-...

x-powered-by

Nuxt

cf-cache-status

DYNAMIC

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

powells-com.mail.protection.outlook.com

Domain Information

powells.com

Domain Age

30y 6m

Created

30.07.1995

Expires

29.07.2026

Last Updated

29.06.2025

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Typography & Readability

Inter

53/100

Readability

/30

32/40

18px · LH 1.33

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Inter

Sans

Body Font

Inter

Sans18px

Contrast Ratio

Reading Comfort

~92 CPL

Needs attention

24px

20px

18px

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

✅ Good performance: Using 2 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.

⚠️ Wide lines: ~92 chars/line. Consider max-width for better reading flow.

⚠️ Cramped layout: 117 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

KlaviyoE-commerce

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn-cookieyes.com(2)googletagmanager.com(1)local(1)

Website Identity

powells.com

30 years old

Cloudflare, Inc.📧 Microsoft 365

Social Profiles

Facebook Instagram YouTube TikTok

Sponsored

Last analyzed: 14 Feb 2026 at 01:30

Historical Analysis & Change Tracking