6502.org

https://6502.org· First analyzed 05 May 2026· Updated 05 May 2026

Export

6502.org

Mobile

Sponsored

Hosting Provider

DigitalOcean

digitalocean.com

IP Address

45.55.141.200

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Clifton, United States

ASN

AS14061

Organization

Digital Ocean

Server

Apache

Nameservers

ns4.dnsmadeeasy.com.ns2.dnsmadeeasy.com.ns1.dnsmadeeasy.com.ns3.dnsmadeeasy.com.+1 more

Performance

Core Web Vitals

Weight

First Contentful Paint

797 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

227 KB

8 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

DigitalOcean

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Web Servers

Apache

SEO Analysis

D57/100

Meta Tags12/15

Content9/12

Headings3/8

Technical12/21

E-E-A-T2/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

6502.org6502.org

6502.org: The 6502 Microprocessor Resource

Information, links, and projects for enthusiasts of the 6502 microprocessor.

Title Length42 chars

Recommended: 50-60 chars (~256px / 580px)

Description Length76 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

Local SEO

Local Search Readiness

12/100

Poor

4 12 1

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

Sponsored

AI & LLM Readiness

D47/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

5/25

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

navheader/footer

Text ratio:28%

Words:328

Token eff.:Optimal

Sections/1K:9.1

Depth:2/5

Structured Data

1 JSON-LD

Person×1.3WebSite

Citation Readiness

Opening Summary48w

Descriptive Headingsavg 1.7w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

Upgrade to view recommendations

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.

76/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

13/20

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

4/15

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

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

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.

79/100

A+

23 mg

CO₂e / view

226.7 KB

Page Weight

95%

Cleaner Than

New Visitor

26 mg

Returning (cached)

13 mg

Annual (10K/mo)

2.7 kg

Emission Segments

Data Center

1 mg

Network

7 mg

Device

15 mg

Resource Breakdown

JavaScript

585 B

Images

218.9 KB

CSS

4.4 KB

HTML

2.9 KB

Green Hosting Verified

DigitalOcean

Provider Match

2 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

10%Critical

No SSL

No WAF

N/A

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

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

connection

content-encoding

📦 Gzip(gzip)

content-length

2642

content-type

text/html; charset=UTF-8

date

Tue, 05 May 2026 20:47:33 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

naberezny.com

Domain Information

6502.org

Domain Age

27 years

Created

20.04.1999

Expires

20.04.2033

Last Updated

11.03.2024

Registrar

DNC Holdings, 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.

53/100

Mobile Friendly

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

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial

56/100

Readability

/30

12/30

13px · LH 1.60

Hierarchy

/20

8/20

WCAG

/25

16/25

1:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

-apple-system

Sans

Body Font

-apple-system

Sans13px

Contrast Ratio

1:1

4 issues

Reading Comfort

~43 CPL

Narrow lines

16px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.0:1).

❌ 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 36

Color Palette

6 unique colors

Light

#ffffff

Background· 60.800000000000004%

#2f6295

Primary· 13.6%

#232c33

Secondary· 7.5%

#98a6af

Secondary· 6.3%

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(1)

Website Identity

6502.org: The 6502 Microprocessor Resource

Information, links, and projects for enthusiasts of the 6502 microprocessor.

mike@naberezny.com

27 years old

Location detected: 🇺🇸 United Statesvia ip

DNC Holdings, Inc.enEst. 1999

Sponsored

Last analyzed: 05 May 2026 at 20:48

Historical Analysis & Change Tracking