keisan.site
高精度計算サイト
Last scanned Jul 26, 2026, 5:17 AM · 1 view
Overall score
Excellent
Summary
計算の正確さ、使いやすさ、楽しさを追求した本格的な計算サイトです。メタボが気になる方の健康計算、旧暦や九星のこよみ計算、日曜大工で活用される斜辺や�… This website uses Apache hosted on AWS behind CloudFront CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
計算の正確さ、使いやすさ、楽しさを追求した本格的な計算サイトです。メタボが気になる方の健康計算、旧暦や九星のこよみ計算、日曜大工で活用される斜辺や面積の計算、高度な実務や研究で活きる高精度な特殊関数や統計関数など多彩なコンテンツがあります。
- United States
- Hosted on AWS
Top issues to fix
5 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
2 cookies without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
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 broken link on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
2 issue(s) found
Performance
410 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
計算の正確さ、使いやすさ、楽しさを追求した本格的な計算サイトです。メタボが気になる方の健康計算、旧暦や九星のこよみ計算、日曜大工で活用される斜辺や面積の計算、高度な実務や研究で活きる高精度な特殊関数や統計関数など多彩なコンテンツがあります。
Meta tags
- Title
- 高精度計算サイト
- Description
- 計算の正確さ、使いやすさ、楽しさを追求した本格的な計算サイトです。メタボが気になる方の健康計算、旧暦や九星のこよみ計算、日曜大工で活用される斜辺や面積の計算、高度な実務や研究で活きる高精度な特殊関数や統計関数など多彩なコンテンツがあります。
- Canonical
- https://keisan.site/
- Language
- ja
- Charset
- utf-8
- Viewport
- width=1024
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- CloudFront
- IP address
- 13.225.5.4
- 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 1.3
- Issuer
- Amazon
- Subject
- keisan.site
- Valid from
- Apr 28, 2026
- Valid to
- Nov 11, 2026
- Days until expiry
- 108
- SAN domains
- keisan.site, www.keisan.site
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 2 cookie(s) observed
Content & assets
Headings
H1 1 · H2 1 · H3 9
Links
245 internal · 3 external · 1 broken
Images
39 total · 2 missing alt
Scripts / Styles
14 scripts · 3 stylesheets
JS / CSS size
368 KB · 52.5 KB
Page size
39.0 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 3776
SEO issues
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://keisan.site
- Final URL
- https://keisan.site
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 410 ms
- HTML size
- 39.0 KB
- Redirect chain
- https://keisan.site
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does keisan.site use?
- keisan.site is built with jQuery, Google Ads, Apache.
- Is keisan.site secure (HTTPS)?
- Yes. keisan.site uses TLS 1.3 with a certificate issued by Amazon, valid until Nov 11, 2026.
- Who hosts keisan.site?
- keisan.site is hosted on AWS, behind CloudFront CDN.
- What is keisan.site's SEO score?
- keisan.site scored 85/100 for SEO in the latest analysis (great).
- What is keisan.site's overall website score?
- keisan.site has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card