common-lisp.net

https://common-lisp.net· First analyzed 01 May 2026· Updated 01 May 2026

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common-lisp.net

Mobile

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Hosting Provider

Hetzner

hetzner.com

IP Address

65.108.13.229

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS24940

Organization

Hetzner Online GmbH

Server

Apache

Nameservers

ns-222-a.gandi.net.ns-159-b.gandi.net.ns-177-c.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

548 ms10%

Speed Index

712 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.5 MB

22 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Blogger

Technology Stack

6 Technologies Detected

CSS Frameworks

Libraries

Icon Libraries

Fonts

Web Servers

SEO Analysis

D56/100

Meta Tags4/15

Content11/12

Headings8/8

Technical11/21

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

common-lisp.netcommon-lisp.net

Welcome to Common-Lisp.net!

No description available for this page.

Title Length27 chars

Recommended: 50-60 chars (~169px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

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Local SEO

Local Search Readiness

3/100

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

D44/100

Bot Access

20/25

Machine Read.

16/25

Schema Data

0/25

Citation

8/25

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

code blocksnav

Text ratio:30%

Words:1,158

Token eff.:Optimal

Sections/1K:6.9

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary12w

Descriptive Headingsavg 2.2w

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...

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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.

72/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

20/20

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

12/15

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

6/15

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.

34/100

361 mg

CO₂e / view

3.5 MB

Page Weight

15%

Cleaner Than

New Visitor

413 mg

Returning (cached)

206 mg

Annual (10K/mo)

43.3 kg

Emission Segments

Data Center

18 mg

Network

106 mg

Device

237 mg

Resource Breakdown

JavaScript

51.1 KB

Images

44.4 KB

CSS

3.4 MB

Fonts

1.0 KB

HTML

6.0 KB

Other

618 B

Green Hosting Verified

Hetzner Online GmbH

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

66d

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/2

Valid From

07.04.2026

Valid Until

06.07.2026

Subject Alternative Names (20)

cl-foundation.comcl-foundation.orgcl.foundationcommon-lisp.foundationcommon-lisp.netcontainers.common-lisp.netfuture.common-lisp.netgit.common-lisp.net+12 more

SHA-256 Fingerprint

5B:CB:88:F3:01:53:9D:A3:F8:1C:01:BB:BD:CC:81:E7:24:CF:DE:23...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

content-encoding

📦 Gzip(gzip)

content-length

5829

content-type

text/html

date

Fri, 01 May 2026 03:01:09 GMT

etag

"4284-643baa0f0f1e3-gzip"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail.common-lisp.net

Domain Information

common-lisp.net

Domain Age

22y 10m

Created

26.06.2003

Expires

26.06.2031

Last Updated

09.06.2025

Registrar

Gandi SAS

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.

65/100

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,shrink-to-fit=no

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

-apple-system

WCAG Partial

65/100

Readability

/30

21/30

14px · LH 1.33

Hierarchy

/20

17/20

2.26x ratio · ✓ H1→H6

WCAG

/25

16/25

3.95:1 min contrast

Performance

/25

11/25

System fonts

Heading Font

-apple-system

Sans33px

Body Font

-apple-system

Sans14px

Contrast Ratio

3.95:1

10 issues

Reading Comfort

~42 CPL

Narrow lines

33px

26px

23px

20px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 4.0:1).

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

✅ Strong hierarchy: Headlines are 2.3x larger than body text.

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

GGoogle FontsFlesch 55

Color Palette

6 unique colors

11.43:1 AAA Light

#fcfcfc

Background· 66.2%

#383838

Other· 12.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)reddit.com(1)

Website Identity

common-lisp.net

22 years old

Location detected: 🇫🇮 Finlandvia ip

Gandi SASen

Social Profiles

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Last analyzed: 01 May 2026 at 03:01

Historical Analysis & Change Tracking