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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video-bookmark.com

https://video-bookmark.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

video-bookmark.com

Sponsored

Hosting Provider

STRATO

strato.de

IP Address

81.169.219.51

Server Location

🇩🇪 Berlin, Germany

ASN

AS6724

Organization

Strato AG

Server

Apache

Nameservers

dns1.registrar-servers.com.dns2.registrar-servers.com.

Performance

Page Speed

36 KB

16 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Technology Stack

2 Technologies Detected

Libraries

jQueryv1.3.2

Web Servers

Apache

SEO Analysis

D47/100

video-bookmark.comvideo-bookmark.com

Video Bookmark · Bookmark your favorite videos and websites of the ...

With Video Bookmark you are able to save and embed your favorite videos and websites of the internet easily, fast and from each computer connected to the int...

Title truncated. Description truncated.

Title Length75 chars

Recommended: 50-60 chars

Description Length255 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag - page may not be mobile-friendly

7 issues found

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Crawlability

Sitemap

Type: standard

99 URLs

robots.txt

3 rules

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

43d

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/1.1

Valid From

02.01.2026

Valid Until

02.04.2026

Subject Alternative Names (2)

video-bookmark.comwww.video-bookmark.com

SHA-256 Fingerprint

A7:54:4B:83:36:77:66:53:76:E8:48:B8:90:C9:CF:86:4A:65:F6:88...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

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

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

7466

content-type

text/html; charset=UTF-8

date

Wed, 18 Feb 2026 04:15:40 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.video-bookmark.com

Domain Information

video-bookmark.com

Domain Age

16y 5m

Created

27.08.2009

Expires

27.08.2026

Last Updated

10.08.2025

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Lucida Grande

43/100

Readability

/30

20/40

12px · LH 1.70

Hierarchy

/20

25/25

2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Lucida Grande

Sans23px

Body Font

Lucida Grande

Sans12px

Contrast Ratio

Reading Comfort

~102 CPL

Needs attention

23px

24px

17px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

✅ Consistent design: Single font family with weight variations is a modern best practice.

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

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

video-bookmark.com(2)e-soft24.com(1)

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Last analyzed: 18 Feb 2026 at 04:15

Historical Analysis & Change Tracking