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classi.jp

Classi（クラッシー） - 学校教育のICT活用を支援するクラウドサービス

Last scanned Aug 6, 2026, 1:00 AM · 7 views

86

Overall score

Great

Summary

Classiは、学校のICT化を多角的にサポートする教育プラットフォームです。PCやタブレット、スマートフォンにも対応し、中学校、高校、専門学校など多くの教育現��… This website uses WordPress behind CloudFront CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.

Classiは、学校のICT化を多角的にサポートする教育プラットフォームです。PCやタブレット、スマートフォンにも対応し、中学校、高校、専門学校など多くの教育現場で活用されています。

Top issues to fix

7 issues found · 2 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Title longer than 60 characters

    SEO

    Shorten the title to under 60 characters so search results don't truncate it.

  • Meta description longer than 160 characters

    SEO

    Trim the meta description to under 160 characters to avoid truncation in search results.

+1 more issue — details in the sections below.

90

SEO

2 issue(s) found

90

Performance

227 ms

65

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

+1 overall since Jul 26, 2026

Overall
86
SEO
90
Security
65
Performance
90
Accessibility
100

Organization

Company details published in this site's own structured data.

Classiは、学校のICT化を多角的にサポートする教育プラットフォームです。PCやタブレット、スマートフォンにも対応し、中学校、高校、専門学校など多くの教育現場で活用されています。

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Meta tags

Title
Classi（クラッシー） - 学校教育のICT活用を支援するクラウドサービス
Description
Classiは、学校のICT化を多角的にサポートする教育プラットフォームです。PCやタブレット、スマートフォンにも対応し、中学校、高校、専門学校など多くの教育現場で活用されています。
Canonical
https://classi.jp
Language
ja
Charset
UTF-8
Viewport
width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=0, viewport-fit=cover
Robots meta
index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Classi（クラッシー） - 学校教育のICT活用を支援するクラウドサービス
og:description
Classiは、学校のICT化を多角的にサポートする教育プラットフォームです。PCやタブレット、スマートフォンにも対応し、中学校、高校、専門学校など多くの教育現場で活用されています。
og:type
website
og:url
https://classi.jp

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

WordPressjQueryGoogle AnalyticsMeta Pixel

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
108.159.80.89
ASN
—

DNS records

TypeValue
A
  • 108.159.80.89
  • 108.159.80.119
  • 108.159.80.94
  • 108.159.80.40
AAAA—
MX
  • alt1.aspmx.l.google.com
  • aspmx3.googlemail.com
  • aspmx2.googlemail.com
  • aspmx.l.google.com
  • alt2.aspmx.l.google.com
TXT—
NS
  • ns-1050.awsdns-03.org
  • ns-970.awsdns-57.net
  • ns-299.awsdns-37.com
  • ns-1677.awsdns-17.co.uk
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
classi.jp
Valid from
Nov 22, 2025
Valid to
Dec 20, 2026
Days until expiry
136
SAN domains
classi.jp, www.classi.jp

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 6 · H3 7

Links

20 internal · 8 external · 1 broken

Images

30 total · 0 missing alt

Scripts / Styles

17 scripts · 5 stylesheets

JS / CSS size

819 KB · 516 KB

Page size

44.6 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
1
sitemap.xml
Found
URLs in sitemap
-1

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://classi.jp
Final URL
https://classi.jp
HTTP status
200
HTTP version
HTTP/2
Response time
227 ms
HTML size
44.6 KB
Redirect chain
https://classi.jp

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Frequently asked questions

What technology does classi.jp use?
classi.jp is built with WordPress, jQuery, Google Analytics, Meta Pixel.
Is classi.jp secure (HTTPS)?
Yes. classi.jp uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 20, 2026.
Who hosts classi.jp?
Hosting provider information for classi.jp is not available yet.
What is classi.jp's SEO score?
classi.jp scored 90/100 for SEO in the latest analysis (excellent).
What is classi.jp's overall website score?
classi.jp has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.
Has classi.jp's score changed over time?
classi.jp's overall score has improved by 1 point (from 85 to 86) since Jul 26, 2026.