listjs.com

https://listjs.com· First analyzed 29 May 2026· Updated 29 May 2026

Export

listjs.com

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

ns-cloud-d1.googledomains.com.ns-cloud-d4.googledomains.com.ns-cloud-d2.googledomains.com.ns-cloud-d3.googledomains.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.1 s10%

Speed Index

1.4 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

92 KB

35 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Platform

GitHub Pages

CDN

Fastly

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Fonts

Payments

SEO Analysis

C61/100

Meta Tags12/15

Content11/12

Headings8/8

Technical8/21

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile2/4

Indexability3/3

listjs.comlistjs.com

Search, sort, filters, flexibility to tables, list and more! - List.js

Perfect library for adding search, sort, filters and flexibility to tables, lists and various HTML elements. Built to be invisible and work on existing HTML.

Title Length70 chars

Recommended: 50-60 chars (~399px / 580px)

Description Length158 chars

Recommended: 120-160 chars

Issues (2)

• Most images missing alt text (3/4) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

9 issues found

Upgrade to view details

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

D46/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

16/25

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

blockquotescode blocks

Text ratio:16%

Words:807

Token eff.:Optimal

Sections/1K:12.4

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary33w

Descriptive Headingsavg 5.8w

Canonical URL

Open Graph3/3

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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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.

56/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

11/20

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.

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.

55/100

A+

11 mg

CO₂e / view

92.2 KB

Page Weight

95%

Cleaner Than

New Visitor

13 mg

Returning (cached)

7 mg

Annual (10K/mo)

1.4 kg

Emission Segments

Data Center

3 mg

Network

3 mg

Device

6 mg

Resource Breakdown

JavaScript

70.0 KB

Images

9.8 KB

CSS

6.4 KB

Fonts

1.1 KB

HTML

4.9 KB

Green Hosting Not Verified

GitHub Pages

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

52d

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

22.04.2026

Valid Until

21.07.2026

Subject Alternative Names (2)

listjs.comwww.listjs.com

SHA-256 Fingerprint

54:45:C3:7B:BC:00:21:25:19:CD:44:F1:8C:9D:80:C8:24:9C:53:DD...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

cache-control

🟡 600s(max-age=600)

content-encoding

📦 Gzip(gzip)

content-length

4742

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

listjs.com

Domain Age

15y 4m

Created

30.01.2011

Expires

30.01.2027

Last Updated

15.01.2026

Registrar

Squarespace Domains II 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.

37/100

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...

Upgrade to view recommendations

Typography & Readability

helvetica neue

WCAG Partial

76/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

16/20

4.5x ratio · ✓ H1→H6

WCAG

/25

17/25

1.82:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

helvetica neue

Sans72px

Body Font

helvetica neue

Sans16px

Contrast Ratio

1.82:1

39 issues

Reading Comfort

~42 CPL

Narrow lines

72px

30px

20px

16px

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

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

⚠️ Partial contrast: 39 elements below WCAG AA threshold (min 1.8:1).

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

✅ Strong hierarchy: Headlines are 4.5x larger than body text.

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

GGoogle FontsFlesch 52

Color Palette

8 unique colors

16.86:1 AAA Light

#ffffff

Background· 50.7%

#201c1d

Text· 7.9%

#27a8e1

Primary· 17.9%

#ecf5f4

Secondary· 14.2%

#5cb7dc

Accent· 2.9%

#2799cd

Accent· 0.3%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Social Media

Twitter/X WidgetsFree

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

apis.google.com(3)platform.twitter.com(3)connect.facebook.net(2)local(2)ssl.google-analytics.com(1)

Website Identity

listjs.com

15 years old

Location detected: 🇺🇸 United Statesvia ip

Squarespace Domains II LLCen

Social Profiles

X (Twitter)GitHub

Sponsored

Last analyzed: 29 May 2026 at 22:26

Historical Analysis & Change Tracking