doorkeeper.jp
セミナー・勉強会・イベント管理ツール | Doorkeeper
Last scanned Aug 5, 2026, 12:00 PM · 9 views
Overall score
Great
Summary
セミナーやイベントの開催も、集客も、集金も。Doorkeeperなら全部まとめて簡単に。. This website uses Google Analytics. SEO is fair (70/100) and accessibility is good (85/100). Security scores excellent (90/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.
セミナーやイベントの開催も、集客も、集金も。Doorkeeperなら全部まとめて簡単に。
Top issues to fix
9 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.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
1.57 s
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-2 overall since Jul 26, 2026
- Overall
- 83
- SEO
- 70
- Security
- 90
- Performance
- 90
- Accessibility
- 85
Organization
Company details published in this site's own structured data.
セミナーやイベントの開催も、集客も、集金も。Doorkeeperなら全部まとめて簡単に。
Contact
Email, phone, and address published on this site's own pages.
- Phone
- 81505291784
Meta tags
- Title
- セミナー・勉強会・イベント管理ツール | Doorkeeper
- Description
- セミナーやイベントの開催も、集客も、集金も。Doorkeeperなら全部まとめて簡単に。
- Canonical
- https://www.doorkeeper.jp/
- Language
- ja
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- *.doorkeeper.jp
- Valid from
- Jul 25, 2026
- Valid to
- Oct 23, 2026
- Days until expiry
- 78
- SAN domains
- *.doorkeeper.jp
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 9
Links
40 internal · 21 external · 18 broken
Images
25 total · 12 missing alt
Scripts / Styles
19 scripts · 2 stylesheets
JS / CSS size
2.8 KB · 0 B
Page size
38.5 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
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- More than 20% of images are missing alt text
Scan details
- Requested URL
- https://doorkeeper.jp
- Final URL
- https://www.doorkeeper.jp/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 1.57 s
- HTML size
- 38.5 KB
- Redirect chain
- https://doorkeeper.jp → https://www.doorkeeper.jp/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does doorkeeper.jp use?
- doorkeeper.jp is built with Ruby on Rails, Google Analytics.
- Is doorkeeper.jp secure (HTTPS)?
- Yes. doorkeeper.jp uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 23, 2026.
- Who hosts doorkeeper.jp?
- Hosting provider information for doorkeeper.jp is not available yet.
- What is doorkeeper.jp's SEO score?
- doorkeeper.jp scored 70/100 for SEO in the latest analysis (fair).
- What is doorkeeper.jp's overall website score?
- doorkeeper.jp has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
- Has doorkeeper.jp's score changed over time?
- doorkeeper.jp's overall score has declined by 2 points (from 85 to 83) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card