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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 Jul 26, 2026, 5:47 AM

85

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 good (80/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (100/100). 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

9 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.

+3 more issues — details in the sections below.

80

SEO

4 issue(s) found

100

Performance

281 ms

65

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

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。

YouTubeFacebook

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.

WordPressjQuery

Hosting & CDN

Hosting provider
—
CDN provider
CloudFront
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
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
145
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 · 20 broken

Images

25 total · 0 missing alt

Scripts / Styles

11 scripts · 5 stylesheets

JS / CSS size

4.0 KB · 825 B

Page size

44.6 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters
  • robots.txt not found
  • sitemap.xml not found

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
281 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.
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 80/100 for SEO in the latest analysis (great).
What is classi.jp's overall website score?
classi.jp has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.