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pdbj.org

https://pdbj.org· First analyzed 16 May 2026· Updated 16 May 2026
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pdbj.org
Desktop screenshot of pdbj.org
Mobile screenshot of pdbj.org
Mobile

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Hosting Provider

Osaka University

IP Address

133.1.158.177

Site Location

🇯🇵 Japanvia ip

Server Location

🇯🇵 Ibaraki, Japan

ASN

AS4730

Organization

Osaka University

Server

Nginx

Nameservers

2nd.dnsv.jp.ns1.pdbj.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
312 ms10%
Speed Index
406 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
382 KB
38 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Osaka University

Technology Stack

1 Technologies Detected

Web Servers

1
Nginx

SEO Analysis

C60/100
18
9
1
Meta Tags12/15
Content8/12
Headings1/8
Technical19/25
E-E-A-T0/7
Images5/7
Links4/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
P
pdbj.orgpdbj.org

PDBj top page - Protein Data Bank Japan

PDBj maintains the single global PDB/BMRB/EMDB archives of macromolecular structures and provides integrated tools for searching & analyzing PDB data

Title Length39 chars

Recommended: 50-60 chars (~239px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (1)

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

10 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,474 URLs

robots.txt

6 rules

Local SEO

Local Search Readiness

13/100
Poor
4 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F38/100
Bot Access
20/25
Machine Read.
10/25
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
navheader/footer
Text ratio:5%
Words:464
Token eff.:Optimal
Sections/1K:10.8
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary365w
Descriptive Headingsavg 3w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
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.
C
61/100
8
Passed
4
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
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
7/15
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.
57/100
A
47 mg
CO₂e / view
382.1 KB
Page Weight
90%
Cleaner Than
New Visitor
54 mg
vs
Returning (cached)
27 mg
Annual (10K/mo)
5.7 kg
Emission Segments
Data Center
11 mg
Network
11 mg
Device
25 mg
Resource Breakdown
JavaScript
27.9 KB
Images
316.9 KB
HTML
15.9 KB
Other
21.5 KB
Green Hosting Not Verified
Osaka University
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

36%Critical
Interactive

HTTPS

No WAF

26d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

SECOM Trust Systems CO.,LTD.

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

14.03.2026

Valid Until

11.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

pdbj.orgwww.pdbj.org

SHA-256 Fingerprint

F7:58:84:04:C9:38:12:75:D1:15:BA:29:8A:5A:DB:92:C2:E4:8D:2A...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin
*
alt-svc
h3=":443"; ma=86400
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Sat, 16 May 2026 08:21:10 GMT
server
nginx
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

mail1.pdbj.org

Domain Information

pdbj.org

Domain Age
24y 4m

Created

04.01.2002

Expires

04.01.2033

Last Updated

28.04.2025

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
Data Protection Officer mentioned

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
74/100
Mobile Friendly40 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, initial-scale=1
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

verdana

WCAG AAA
65/100
Readability
/30
21/30

35px · LH --

Hierarchy
/20
7/20
WCAG
/25
23/25

7.88:1 min contrast

Performance
/25
14/25

1 font

Heading Font

verdana

Sans

Body Font

verdana

Sans35px

Contrast Ratio

7.88:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned
21px
h3
35px
p

✅ Excellent readability: 35px 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 7.9:1).

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

Buy on MyFontsFlesch 41

Color Palette

9 unique colors
Light
#ffffff
Background· 46.900000000000006%
#99a0b6
Primary· 7.8%
#add5c3
Secondary· 7.6%
#c3ded1
Secondary· 6%
#e7f3ee
Secondary· 4.9%
#5f6c92
Secondary· 4.4%
#a2c0bb
Secondary· 4.3%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

3 Resources

3
Scripts
0
Styles
0
Async
0
Defer

Top Script Sources

.(3)

Website Identity

pdbj.org

24 years old
Location detected: 🇯🇵 Japanvia ip
GMO Internet Group, Inc. d/b/a Onamae.comen

Sponsored

Last analyzed: 16 May 2026 at 08:21

Historical Analysis & Change Tracking