celluloid.io

https://celluloid.io· First analyzed 04 Jun 2026· Updated 04 Jun 2026

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celluloid.io

Mobile

Sponsored

Hosting Provider

3nt solutions LLP

IP Address

185.192.22.64

Site Location

🇳🇱 Netherlandsvia ip

Server Location

🇳🇱 Amsterdam, Netherlands

ASN

AS50132

Organization

3nt solutions LLP

Server

Apache

Nameservers

ns-4b78e6a3.ns.aki.cloud.ns-7f194dad.ns.aki.cloud.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

256 ms10%

Speed Index

333 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

16 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

3nt solutions LLP

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

4 Technologies Detected

CSS Frameworks

Libraries

Web Servers

SEO Analysis

C62/100

Meta Tags14/15

Content7/12

Headings3/8

Technical15/25

E-E-A-T3/7

Images4/7

Links4/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

celluloid.iocelluloid.io

Celluloid: Actor-based Concurrent Objects for Ruby

Celluloid is an actor-based concurrent object oriented programming framework for the Ruby programming language

Title Length50 chars

Recommended: 50-60 chars (~301px / 580px)

Description Length110 chars

Recommended: 120-160 chars

Issues (1)

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

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2 URLs

robots.txt

3 rules

Allows all crawlers

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

F38/100

Bot Access

20/25

Machine Read.

8/25

Schema Data

0/25

Citation

10/25

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:11%

Words:121

Token eff.:Too Short

Sections/1K:33.1

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary32w

Descriptive Headingsavg 5w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (6)

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.

85/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

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

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

6/15

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

1 recommendation

•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.

60/100

A+

<0.001 g

CO₂e / view

300 B

Page Weight

95%

Cleaner Than

New Visitor

<0.001 g

Returning (cached)

<0.001 g

Annual (10K/mo)

0 g

Emission Segments

Resource Breakdown

HTML

300 B

Green Hosting Not Verified

3nt solutions LLP

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

88%Very Good

Static / Informational

HTTPS

No WAF

49d

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

25.04.2026

Valid Until

24.07.2026

Subject Alternative Names (2)

*.celluloid.iocelluloid.io

SHA-256 Fingerprint

9A:F1:43:14:07:2A:E8:28:72:32:F5:C7:80:9E:82:AB:05:63:1D:2D...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ch

Viewport-Width, Width, DPR

accept-ch-lifetime

86400

alt-svc

h3=":443"; ma=86400

cache-control

🟡 300s(max-age=300 public, must-revalidate)

content-encoding

⚡ Brotli(br)

content-security-policy

frame-ancestors 'none'

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

celluloid.io

Domain Age

3y 11m

Created

15.06.2022

Expires

15.06.2027

Last Updated

24.05.2026

Registrar

Zhuimi 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.

68/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Times New Roman

WCAG AAA

76/100

Readability

/30

22/30

16px · LH --

Hierarchy

/20

16/20

2x ratio · ✓ H1→H6

WCAG

/25

24/25

9.4:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~41 CPL

Narrow lines

32px

24px

19px

16px

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

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

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

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

Buy on MyFontsFlesch 41

Color Palette

8 unique colors

2.69:1 Fail Light

#ffffff

Primary· 91.69999999999999%

#9a9ea5

Other· 2.4%

#767597

Secondary· 1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local.adguard.org(2)ajax.googleapis.com(1)cdnjs.cloudflare.com(1)maxcdn.bootstrapcdn.com(1)

Website Identity

celluloid.io

3 years old

Location detected: 🇳🇱 Netherlandsvia ip

Zhuimi Incen

Social Profiles

GitHub

Sponsored

Last analyzed: 04 Jun 2026 at 20:26

Historical Analysis & Change Tracking