vintage-computer.com

https://vintage-computer.com· First analyzed 17 May 2026· Updated 17 May 2026

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Hosting Provider

A2 Hosting, Inc

IP Address

68.66.224.57

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Phoenix, United States

ASN

AS55293

Organization

A2 Hosting, Inc

Server

LiteSpeed

Nameservers

ns4.a2hosting.com.ns2.a2hosting.com.ns3.a2hosting.com.ns1.a2hosting.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.7 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.1 MB

33 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

A2 Hosting, Inc

Technology Stack

7 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Web Servers

Languages

SEO Analysis

D56/100

Meta Tags7/15

Content11/12

Headings8/8

Technical12/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

vintage-computer.comvintage-computer.com

Erik S. Klein's Vintage Computer Collection - Home of historical co...

Erik S. Klein's Vintage Computer Collection includes such classic systems as Mark-8, Kenbak-1, Apple ][, Apple III, Atari 800, Atari 400, Mits Altair 8800, M...

Title truncated. Description truncated.

Title Length131 chars

Recommended: 50-60 chars (~787px / 580px)

Description Length674 chars

Recommended: 120-160 chars

Issues (2)

• Title is too long (131 chars, ~787px). Will be truncated in search results.
• Most images missing alt text (11/13) — critical for accessibility and SEO

11 issues found

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Crawlability

Sitemap

Type: standard

228 URLs

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.

Sponsored

AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

0/25

Citation

4/25

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:12%

Words:2,250

Token eff.:Optimal

Sections/1K:4.4

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary119w

Descriptive Headingsavg 1.9w

Canonical URL

Open Graph0/3

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.

60/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

15/20

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

Forms & Inputs

10/15

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.

4 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.

37/100

318 mg

CO₂e / view

3.1 MB

Page Weight

30%

Cleaner Than

New Visitor

363 mg

Returning (cached)

182 mg

Annual (10K/mo)

38.1 kg

Emission Segments

Data Center

16 mg

Network

93 mg

Device

209 mg

Resource Breakdown

JavaScript

50.4 KB

Images

2.8 MB

CSS

189.2 KB

HTML

7.7 KB

Green Hosting Verified

A2 Hosting, Inc

Provider Match

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

56%Poor

Interactive

HTTPS

No WAF

89d

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+H3

Valid From

16.05.2026

Valid Until

14.08.2026

Subject Alternative Names (4)

*.erikklein.com*.vintage-computer.comvintage-computer.comwww.sub.erikklein.com

SHA-256 Fingerprint

51:5B:34:2D:05:3F:55:C4:C6:3B:E5:26:2F:6A:15:A5:B8:7E:36:31...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":4...

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sun, 17 May 2026 09:18:35 GMT

server

LiteSpeed

strict-transport-security

max-age=63072000; includeSubDomains

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

vintage-computer.com

Domain Information

vintage-computer.com

Domain Age

24y 2m

Created

23.03.2002

Expires

23.03.2027

Last Updated

03.03.2026

Registrar

Tucows Domains Inc.

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.

51/100

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, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG Partial

70/100

Readability

/30

23/30

20px · LH 1.75

Hierarchy

/20

12/20

1x ratio · ✓ H1→H6

WCAG

/25

14/25

1:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

Helvetica

Sans20px

Body Font

Helvetica

Sans20px

Contrast Ratio

1:1

29 issues

Reading Comfort

~38 CPL

Narrow lines

20px

50px

27px

20px

Perfect Fifth

Scale

✅ Excellent readability: 20px body text is ideal for all devices.

⚠️ Partial contrast: 29 elements below WCAG AA threshold (min 1.0:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

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

Buy on MyFonts

Color Palette

9 unique colors

Light

#a0a0af

Secondary· 2.9%

#1a1a22

Primary· 89.89999999999999%

#b8bcd4

Secondary· 1%

#5a3d45

Secondary· 0.9%

#ced3e4

Secondary· 0.6%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

assets(8)googletagmanager.com(1)google-analytics.com(1)

Website Identity