sdf.org

https://sdf.org· First analyzed 23 Apr 2026· Updated 23 Apr 2026

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sdf.org

Mobile

Sponsored

Hosting Provider

Troubador Systems

IP Address

205.166.94.16

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Martin, United States

ASN

AS14361

Organization

Troubador Systems

Server

Apache

Nameservers

ns-b.sdf.org.ns-a.sdf.org.ns-d.sdf.org.ns-c.sdf.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

267 ms10%

Speed Index

347 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

5 KB

2 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Troubador Systems

Technology Stack

3 Technologies Detected

Payments

PayPal

Web Servers

Apachev2.4.65

Languages

PHPv8.3.25

SEO Analysis

F34/100

Meta Tags7/15

Content6/12

Headings1/8

Technical6/25

E-E-A-T0/7

Images0/7

Links2/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

sdf.orgsdf.org

SDF Public Access UNIX System - Free Shell Account and Shell Access

No description available for this page.

Title Length67 chars

Recommended: 50-60 chars (~402px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

14 issues found

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Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

2/100

Poor

1 14 2

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

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AI & LLM Readiness

F25/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

3/25

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

Text ratio:13%

Words:96

Token eff.:Too Short

Sections/1K:10

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headingsavg 10w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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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.

64/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

4/20

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

9/15

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.

3 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.

50/100

A+

<0.001 g

CO₂e / view

5.3 KB

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

84 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

<0.001 g

Resource Breakdown

Images

909 B

HTML

4.4 KB

Green Hosting Not Verified

Troubador Systems

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

41d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

05.03.2026

Valid Until

03.06.2026

Subject Alternative Names (1)

sdf.org

SHA-256 Fingerprint

11:02:29:81:7F:8D:3C:A2:00:DF:F6:8E:8C:C0:DB:49:78:20:0C:46...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-type

text/html

date

Thu, 23 Apr 2026 13:37:20 GMT

keep-alive

timeout=5, max=100

server

Apache/2.4.65 (Unix) OpenSSL/3.4.1 PHP/8.3.25

transfer-encoding

chunked

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mx.sdf.org

Domain Information

sdf.org

Domain Age

29y 6m

Created

12.10.1996

Expires

11.10.2026

Last Updated

16.09.2025

Registrar

NameCheap, Inc.

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.

41/100

Not 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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG Partial

67/100

Readability

/30

20/30

16px · LH --

Hierarchy

/20

8/20

WCAG

/25

19/25

3.71:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans16px

Contrast Ratio

3.71:1

2 issues

Reading Comfort

Single Font Family

left aligned

19px

16px

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

❌ Very complex text: Flesch score 24/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 3.7:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

Flesch 24

Color Palette

11 unique colors

Light

#ffffff

Background· 67.1%

#ffa07a

Primary· 6.3999999999999995%

#a4d9a6

Secondary· 6.3%

#2fc5c3

Accent· 4.2%

#df8dc0

Accent· 4.2%

#edb578

Accent· 4.1%

#ebe7e4

Secondary· 3.1%

#7567b7

Secondary· 1.8%

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Website Identity

sdf.org

press@sdf.org

29 years old

Location detected: 🇺🇸 United Statesvia ip

NameCheap, Inc.

Sponsored

Last analyzed: 23 Apr 2026 at 13:37

Historical Analysis & Change Tracking