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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rbb-online.de

https://rbb-online.de· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

rbb-online.de

Sponsored

Hosting Provider

IP Network RBB Berlin Potsdam

IP Address

192.108.72.56

Server Location

🇩🇪 Berlin, Germany

ASN

AS41969

Nameservers

ns1.vodafone-ip.de.auth1.dns.cogentco.com.ns2.vodafone-ip.de.auth2.dns.cogentco.com.

Performance

Page Speed

2.4 MB

214 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Adobe Experience Manager

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Google Analytics

SEO Analysis

A+94/100

rbb-online.derbb-online.de

rbb24 - Nachrichten aus Berlin und Brandenburg

rbb|24 ist das Informationsportal für Berlin und Brandenburg. Nachrichten, Videos und Livestreams aus Politik, Wirtschaft, Sport + Kultur.

Title Length46 chars

Recommended: 50-60 chars

Description Length138 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

97 rules

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

48d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

07.01.2026

Valid Until

07.04.2026

Subject Alternative Names (10)

www.antennebrandenburg.dewww.fritz.dewww.inforadio.dewww.ohrenbaer.dewww.radiodrei.dewww.radioeins.dewww.rbb-online.dewww.rbb24.de+2 more

SHA-256 Fingerprint

B2:6A:23:46:B4:11:68:78:D1:EA:92:63:BD:07:7F:E9:1C:8C:6A:0F...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

alt-svc

h3=":443"; ma=93600

content-encoding

📦 Gzip(gzip)

content-length

44959

content-security-policy-report-only

report-uri https://cspr.app.rbb-cloud.de/cspr/;frame-ancesto...

content-type

text/html;charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

rbbonline-de0i.mail.protection.outlook.com

Domain Information

rbb-online.de

Last Updated

05.05.2023

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Interstate

88/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Interstate

Sans32px

Body Font

Interstate

Sans16px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

32px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x 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

19 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)gstatic.com(2)pkedcjkdefgpdelpbcmbmeomcjbeemfm(1)enhhojjnijigcajfphajepfemndkmdlo(1)tag.aticdn.net(1)

Website Identity

Facebook Instagram TikTok Bluesky

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Last analyzed: 18 Feb 2026 at 00:10

Historical Analysis & Change Tracking