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cover-corp.com

https://cover-corp.com· First analyzed 19 May 2026· Updated 19 May 2026
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cover-corp.com
Desktop screenshot of cover-corp.com
Mobile screenshot of cover-corp.com
Mobile

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Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.21

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

ns-1996.awsdns-57.co.uk.ns-677.awsdns-20.net.ns-9.awsdns-01.com.ns-1355.awsdns-41.org.

Performance

92

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%
3.7 MB
175 requests

Image Optimization

Lazy LoadWebPResponsiveVercel Image Optimization
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Next.js
Infrastructure
Platform
Vercel
CDN
Vercel Image

Technology Stack

10 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

Other

1
GSAP

Other

1
D3.js

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Customer Support

1
Zendesk

Platforms

1
Vercel

SEO Analysis

C61/100
18
9
1
Meta Tags7/15
Content6/12
Headings8/8
Technical14/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
C
cover-corp.comcover-corp.com

カバー株式会社 | つくろう。世界が愛するカルチャーを。

カバー株式会社は、「ホロライブプロダクション」をはじめとした日本ならではのコンテンツを世界に向けて発信している、次世代のエンターテインメント企業です。

Title Length28 chars

Recommended: 50-60 chars (~171px / 580px)

Description Length75 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (41/53) — critical for accessibility and SEO

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

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

F36/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
0/25
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
nav
Text ratio:1%
Words:148
Token eff.:Too Short
Sections/1K:6.8
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headingsavg 1.2w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
A
80/100
12
Passed
2
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
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.
3 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.
44/100
F
378 mg
CO₂e / view
3.7 MB
Page Weight
15%
Cleaner Than
New Visitor
432 mg
vs
Returning (cached)
216 mg
Annual (10K/mo)
45.3 kg
Emission Segments
Data Center
19 mg
Network
111 mg
Device
248 mg
Resource Breakdown
JavaScript
436.4 KB
Images
3.1 MB
CSS
17.0 KB
Fonts
90.7 KB
HTML
25.0 KB
Other
5.0 KB
Green Hosting Verified
Vercel
Provider Match
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

40d

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

30.03.2026

Valid Until

28.06.2026

Subject Alternative Names (1)

cover-corp.com

SHA-256 Fingerprint

70:C7:FA:36:36:EA:C0:32:7B:1F:F8:76:8C:41:9E:6C:07:A9:2C:70...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

age
36
cache-control
🔵 Public(public)
content-encoding
⚡ Brotli(br)
content-type
text/html; charset=utf-8
date
Tue, 19 May 2026 21:18:05 GMT
etag
W/"cb1z2bbwys31cy"
Good Warning Issue

Email Infrastructure

Google Workspace

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt3.aspmx.l.google.com
alt2.aspmx.l.google.com
alt4.aspmx.l.google.com
aspmx.l.google.com

+1 more

Domain Information

cover-corp.com

Domain Age
9y 11m

Created

09.06.2016

Expires

09.06.2027

Last Updated

15.04.2024

Registrar

GMO Internet Group, Inc. d/b/a Onamae.com

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
B
72/100
Mobile Friendly209 breakpoints
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Noto Sans JP

WCAG AAA
69/100
Readability
/30
19/30

45px · LH 1.75

Hierarchy
/20
6/20

0.22x ratio

WCAG
/25
24/25

11.56:1 min contrast

Performance
/25
20/25

1 font · 1 req

Heading Font

Noto Sans JP

Sans10px

Body Font

Noto Sans JP

Sans45px

Contrast Ratio

11.56:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned
10px
h1
10px
h2
45px
p
Minor Second
Scale

✅ Excellent readability: 45px body text is ideal for all devices.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 11.6:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

✅ Lean font stack: 1 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

GGoogle FontsFlesch 59

Color Palette

9 unique colors
3.42:1 AA Large Light
#ffffff
Text· 11.4%
#8a899c
Secondary· 6.3%
#141d33
Primary· 24.5%
#142d4c
Accent· 16.9%
#143b61
Accent· 15.4%
#2a476d
Secondary· 12.3%
#516a8d
Secondary· 6.8%
#484e74
Secondary· 5.3%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

23 Resources

20
Scripts
3
Styles
0
Async
17
Defer

Top Script Sources

local(18)googletagmanager.com(2)

Website Identity

cover-corp.com

9 years old
Location detected: 🇺🇸 United Statesvia ip
GMO Internet Group, Inc. d/b/a Onamae.com📧 Google Workspace

Social Profiles

X (Twitter)LinkedIn

Sponsored

Last analyzed: 19 May 2026 at 21:18

Historical Analysis & Change Tracking