stunnel.org

https://stunnel.org· First analyzed 29 Apr 2026· Updated 29 Apr 2026

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stunnel.org

Mobile

Sponsored

Hosting Provider

Kampinos telco

IP Address

185.238.207.45

Site Location

🇵🇱 Polandvia ip

Server Location

🇵🇱 Izabelin C, Poland

ASN

AS207156

Organization

Kampinos telco

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

elly.ns.cloudflare.com.ray.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

495 ms10%

Speed Index

644 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

297 KB

18 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Kampinos telco

CDN

Cloudflare

Technology Stack

5 Technologies Detected

CSS Frameworks

Fonts

CDN

Customer Support

SEO Analysis

D51/100

Meta Tags8/15

Content6/12

Headings0/8

Technical13/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

stunnel.orgstunnel.org

stunnel: Home

Home page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS.

Title Length13 chars

Recommended: 50-60 chars (~79px / 580px)

Description Length112 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

6 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Sitemap reference found

Local SEO

Local Search Readiness

6/100

Poor

2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F32/100

Bot Access

20/25

Machine Read.

3/25

Schema Data

0/25

Citation

9/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

header/footer

Text ratio:16%

Words:204

Token eff.:Too Short

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary39w

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (9)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

10/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

49/100

A+

37 mg

CO₂e / view

296.5 KB

Page Weight

90%

Cleaner Than

New Visitor

42 mg

Returning (cached)

21 mg

Annual (10K/mo)

4.4 kg

Emission Segments

Data Center

8 mg

Network

9 mg

Device

20 mg

Resource Breakdown

JavaScript

875 B

Images

289.0 KB

CSS

1.9 KB

Fonts

1.5 KB

HTML

3.3 KB

Green Hosting Not Verified

Kampinos telco

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

WAF

75d

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

15.04.2026

Valid Until

14.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

stunnel.org*.stunnel.org

SHA-256 Fingerprint

18:FE:21:F1:59:82:8F:23:7A:45:F5:20:59:C9:1D:9B:AD:8B:4A:FB...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9f41d02ffad49b1f-FRA

content-encoding

zstd

content-type

text/html; charset=UTF-8

date

Wed, 29 Apr 2026 22:41:17 GMT

Good Warning Issue

Email Infrastructure

Fastmail

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

in1-smtp.messagingengine.com

in2-smtp.messagingengine.com

Domain Information

stunnel.org

Domain Age

26y 2m

Created

04.03.2000

Expires

04.03.2027

Last Updated

22.02.2026

Registrar

Porkbun LLC

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

61/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Lato + Arial

WCAG Partial

68/100

Readability

/30

24/30

17px · LH 1.47

Hierarchy

/20

8/20

WCAG

/25

17/25

3.72:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Lato

Body Font

Arial

Sans17px

Contrast Ratio

3.72:1

3 issues

Reading Comfort

~36 CPL

Narrow lines

17px

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.47 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 3.7:1).

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle FontsFlesch 33

Color Palette

10 unique colors

17.87:1 AAA Light

#edeef0

Background· 46.800000000000004%

#020202

Text· 7.1%

#1d9d22

Primary· 11.2%

#3eb543

Secondary· 7.3%

#09290a

Accent· 5.8%

#82c185

Secondary· 5.5%

#117515

Accent· 4.6%

#8ce190

Accent· 3.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

6 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(1)static.cloudflareinsights.com(1)

Website Identity

stunnel.org

26 years old

Location detected: 🇵🇱 Polandvia ip

Porkbun LLC📧 Fastmailen

Social Profiles

Sponsored

Last analyzed: 29 Apr 2026 at 22:41

Historical Analysis & Change Tracking