openjfx.io

https://openjfx.io· First analyzed 16 May 2026· Updated 16 May 2026

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openjfx.io

Mobile

Sponsored

Hosting Provider

GitHub Pages

pages.github.com

IP Address

185.199.108.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns2.digitalocean.com.ns1.digitalocean.com.ns3.digitalocean.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

494 ms10%

Speed Index

642 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

14.2 MB

64 requests

0–49

50–89

90–100

Architecture Stack

JAMstack

⚡ SSG

Frontend

Framework

Hugov0.75.1

Styling

Bootstrap

Infrastructure

Platform

GitHub Pages

CDN

Fastly

Technology Stack

7 Technologies Detected

Libraries

CSS Frameworks

Other

Fonts

Analytics

SEO Analysis

C64/100

Meta Tags4/15

Content12/12

Headings8/8

Technical14/25

E-E-A-T3/7

Images4/7

Links5/5

URL5/5

Social2/5

Freshness0/4

Mobile4/4

Indexability3/3

openjfx.ioopenjfx.io

JavaFX

No description available for this page.

Title Length6 chars

Recommended: 50-60 chars (~37px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description — important for click-through rates in SERPs

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

16 URLs

robots.txt

Local SEO

Local Search Readiness

5/100

Poor

1 14 2

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

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

17/25

Schema Data

0/25

Citation

11/25

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

blockquotesnavheader/footer

Text ratio:27%

Words:1,083

Token eff.:Optimal

Sections/1K:38.8

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary67w

Descriptive Headingsavg 3.8w

Canonical URL

Open Graph0/3

Twitter Card2/3

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.

77/100

Passed

Critical

Warnings

Images & Alt Text

18/20

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

Semantic Structure

17/20

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

3/15

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.

18/100

1.80 g

CO₂e / view

14.2 MB

Page Weight

Cleaner Than

New Visitor

2.06 g

Returning (cached)

1.03 g

Annual (10K/mo)

216.3 kg

Emission Segments

Data Center

403 mg

Network

433 mg

Device

967 mg

Resource Breakdown

JavaScript

67.1 KB

Images

14.0 MB

CSS

194.2 KB

Fonts

1.2 KB

HTML

6.8 KB

Green Hosting Not Verified

GitHub Pages

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

76%Good

Static / Informational

HTTPS

No WAF

74d

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

Valid From

30.04.2026

Valid Until

29.07.2026

Subject Alternative Names (1)

openjfx.io

SHA-256 Fingerprint

19:D0:83:7A:9B:D8:30:F2:A7:A8:C9:89:B0:2F:6A:6B:68:CA:AB:F0...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

388

cache-control

🟡 600s(max-age=600)

content-encoding

📦 Gzip(gzip)

content-length

6677

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

openjfx.io

Domain Age

7y 8m

Created

18.09.2018

Expires

18.09.2026

Last Updated

02.11.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

62/100

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

2 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial

79/100

Readability

/30

26/30

16px · LH 1.50

Hierarchy

/20

16/20

3.12x ratio · ✓ H1→H6

WCAG

/25

16/25

1.87:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Arial

Sans50px

Body Font

Arial

Sans16px

Contrast Ratio

1.87:1

40 issues

Reading Comfort

~34 CPL

Narrow lines

50px

24px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 40 elements below WCAG AA threshold (min 1.9:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

GGoogle FontsFlesch 36

Color Palette

4 unique colors

Light

#4ca0ce

Primary· 51.900000000000006%

#55bdb2

Secondary· 35.300000000000004%

#93ced5

Secondary· 5.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

js(9)local(2)google-analytics.com(1)

Website Identity

openjfx.io

7 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLC

Social Profiles

GitHub

Sponsored

Last analyzed: 16 May 2026 at 08:24

Historical Analysis & Change Tracking