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

jbl.com

https://jbl.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

jbl.com

Mobile

Sponsored

Hosting Provider

Harman International Industries Inc

IP Address

199.27.116.77

Server Location

🇺🇸 Addison, United States

ASN

AS15113

Organization

Harman International Industries Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-956.awsdns-55.net.ns-1505.awsdns-60.org.ns-1644.awsdns-13.co.uk.ns-246.awsdns-30.com.

Performance

Page Speed

2 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Harman International Industries Inc

CDN

Cloudflare

Technology Stack

1 Technologies Detected

CDN

Cloudflare

SEO Analysis

F17/100

jbl.comjbl.com

jbl.com

No description available for this page.

Title Length7 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

7 issues found

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Crawlability

Sitemap

robots.txt

47 rules

Sitemap reference found

Sponsored

Security Score

41%Poor

Interactive

HTTPS

WAF

178d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

12.08.2025

Valid Until

12.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.harmanaudio.comar.jbl.comat.jbl.comau.harmanaudio.comau.jbl.combe.harmanaudio.combe.jbl.combr.harmanaudio.com+12 more

SHA-256 Fingerprint

59:2D:4A:91:15:B8:0E:BD:BB:15:5F:27:F7:0F:A4:5F:D6:32:07:21...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-origin

access-control-expose-headers

x-dd-b, x-set-cookie

cache-control

🔴 No Cache(no-cache, no-store, must-revalidate)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9ce420a61f034db0-FRA

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

jbl.com

Domain Age

30y 11m

Created

21.03.1995

Expires

22.03.2026

Last Updated

18.03.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Typography & Readability

Times New Roman

61/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Times New Roman

Body Font

Times New Roman

Serif16px

Contrast Ratio

Reading Comfort

Single Family

left aligned

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

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

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

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

ct.captcha-delivery.com(1)

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Last analyzed: 15 Feb 2026 at 10:30

Historical Analysis & Change Tracking