atmarkit.co.jp
ITエキスパートのための問題解決メディア - ＠IT
Last scanned Aug 3, 2026, 8:00 PM · 7 views
Overall score
Great
Summary
プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナー��… This website uses Nginx hosted on AWS. SEO is good (80/100) and accessibility is good (80/100). Security scores good (85/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.
プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。
- United States
- Hosted on AWS
Top issues to fix
7 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
264 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
-1 overall since Jul 26, 2026
- Overall
- 86
- SEO
- 80
- Security
- 85
- Performance
- 100
- Accessibility
- 80
Organization
Company details published in this site's own structured data.
プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。
Meta tags
- Title
- ITエキスパートのための問題解決メディア - ＠IT
- Description
- プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。
- Canonical
- https://atmarkit.itmedia.co.jp/
- Language
- ja
- Charset
- shift_jis
- Viewport
- Robots meta
- noydir
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- —
- IP address
- 35.79.137.6
- ASN
- AS16509 (AMAZON-02 - Amazon.com, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Amazon
- Subject
- itmedia.co.jp
- Valid from
- May 18, 2026
- Valid to
- Dec 1, 2026
- Days until expiry
- 120
- SAN domains
- itmedia.co.jp, *.itmedia.co.jp, *.atmarkit.itmedia.co.jp, *.sys.itmedia.co.jp, *.ips.itmedia.co.jp, *.techfactory.itmedia.co.jp, *.office.itmedia.co.jp, *.kn.itmedia.co.jp, *.executive.itmedia.co.jp, *.cms.itmedia.co.jp, *.marketing.itmedia.co.jp, *.api.itmedia.co.jp, *.techtarget.itmedia.co.jp, *.ips.sys.itmedia.co.jp
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 11 · H3 36
Links
116 internal · 33 external · 0 broken
Images
58 total · 25 missing alt
Scripts / Styles
107 scripts · 6 stylesheets
JS / CSS size
829 KB · 2.1 KB
Page size
75.3 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 9
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
Accessibility issues
- More than 20% of images are missing alt text
- Missing viewport meta tag
Scan details
- Requested URL
- https://atmarkit.co.jp
- Final URL
- https://atmarkit.itmedia.co.jp/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 263 ms
- HTML size
- 75.3 KB
- Redirect chain
- https://atmarkit.co.jp → https://atmarkit.itmedia.co.jp/
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Frequently asked questions
- What technology does atmarkit.co.jp use?
- atmarkit.co.jp is built with Google Analytics, Google Ads, Meta Pixel, Nginx.
- Is atmarkit.co.jp secure (HTTPS)?
- Yes. atmarkit.co.jp uses TLS 1.2 with a certificate issued by Amazon, valid until Dec 1, 2026.
- Who hosts atmarkit.co.jp?
- atmarkit.co.jp is hosted on AWS.
- What is atmarkit.co.jp's SEO score?
- atmarkit.co.jp scored 80/100 for SEO in the latest analysis (great).
- What is atmarkit.co.jp's overall website score?
- atmarkit.co.jp has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.
- Has atmarkit.co.jp's score changed over time?
- atmarkit.co.jp's overall score has declined by 1 point (from 87 to 86) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card