kotlinlang.org
Kotlin Programming Language
Last scanned Jul 26, 2026, 5:17 AM · 1 view
Overall score
Great
Summary
Kotlin is a concise and multiplatform programming language by JetBrains. This website uses Next.js hosted on AWS behind CloudFront CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance good (75/100). Top issue: Multiple H1 headings found.
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build backend, mobile, web, and desktop applications efficiently.
- United States
- Hosted on AWS
Top issues to fix
5 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
SEO
2 issue(s) found
Performance
413 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build backend, mobile, web, and desktop applications efficiently.
Meta tags
- Title
- Kotlin Programming Language
- Description
- Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build backend, mobile, web, and desktop applications efficiently.
- Canonical
- https://kotlinlang.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- CloudFront
- IP address
- 18.239.111.106
- 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
- kotlinlang.org
- Valid from
- Sep 6, 2025
- Valid to
- Oct 4, 2026
- Days until expiry
- 70
- SAN domains
- kotlinlang.org, www.kotlinlang.org, kotlinlang.prod.kotlin-aws.intellij.net, www.kotlinlang.prod.kotlin-aws.intellij.net
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsMissing
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 5 · H2 8 · H3 16
Links
34 internal · 36 external · 0 broken
Images
50 total · 2 missing alt
Scripts / Styles
55 scripts · 7 stylesheets
JS / CSS size
1.2 MB · 378 KB
Page size
244 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Multiple H1 headings found
- No structured data (JSON-LD) found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://kotlinlang.org
- Final URL
- https://kotlinlang.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 408 ms
- HTML size
- 244 KB
- Redirect chain
- https://kotlinlang.org
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Frequently asked questions
- What technology does kotlinlang.org use?
- kotlinlang.org is built with Next.js, Google Analytics, Meta Pixel, TikTok Pixel.
- Is kotlinlang.org secure (HTTPS)?
- Yes. kotlinlang.org uses TLS 1.3 with a certificate issued by Amazon, valid until Oct 4, 2026.
- Who hosts kotlinlang.org?
- kotlinlang.org is hosted on AWS, behind CloudFront CDN.
- What is kotlinlang.org's SEO score?
- kotlinlang.org scored 85/100 for SEO in the latest analysis (great).
- What is kotlinlang.org's overall website score?
- kotlinlang.org has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card