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

firsturl.de

https://firsturl.de· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

firsturl.de

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

188.114.97.3

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

CloudFlare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

kai.ns.cloudflare.com.rafe.ns.cloudflare.com.

Performance

Page Speed

651 KB

27 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

11 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Outbrain

Meta Frameworks

CSS Frameworks

Icon Libraries

Fonts

Analytics

Payments

CDN

SEO Analysis

F35/100

firsturl.defirsturl.de

FirstURL - URL kürzen und Dereferer

No description available for this page.

Title Length35 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description - important for click-through rates
• Many images missing alt text (2/3)
• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

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Security Score

0%Critical

Critical / Transactional

HTTPS

WAF

78d

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+H3

Valid From

09.02.2026

Valid Until

10.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

firsturl.de*.firsturl.de

SHA-256 Fingerprint

FB:90:50:88:07:B3:B8:97:B2:1C:F1:A1:D8:17:EE:CC:6E:6E:28:FF...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

date

Fri, 20 Feb 2026 08:57:21 GMT

content-type

text/html; charset=UTF-8

server

cloudflare

vary

Accept-Encoding

nel

{"report_to":"cf-nel", "success_fraction":0.0, "max_age":604...

report-to

{"group":"cf-nel", "max_age":604800, "endpoints":[{"url":"ht...

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (2)

alt1.aspmx.l.google.com

aspmx.l.google.com

Domain Information

firsturl.de

Last Updated

21.04.2018

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Legitimate interest basis mentioned

Typography & Readability

Verdana + -apple-system

50/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

8/25

1.4x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Verdana

Sans22px

Body Font

-apple-system

Sans16px

Contrast Ratio

Reading Comfort

~103 CPL

Needs attention

22px

14px

16px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

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

⚠️ Risky: Text appears on background images without overlay protection.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(2)fundingchoicesmessages.google.com(2)gstatic.com(1)google.com(1)local(1)

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Last analyzed: 20 Feb 2026 at 08:57

Historical Analysis & Change Tracking