Kotlinlang.org - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
92% 
Page structure
74% 
Link structure
87% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.26 s
File size
248.40 kB
Words
884
Media files
24
Number of links
21 internal / 33 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Kotlin Programming Language
The length of the page title is perfect. (271 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.
The length of the meta description is perfect. (976 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: Germany
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1
descriptionKotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.
next-head-count18
langen
twitter:cardsummary_large_image
twitter:site@kotlin
twitter:titleKotlin Programming Language
twitter:descriptionKotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.
twitter:image:srchttps://kotlinlang.org/assets/images/open-graph/general.png
og:titleKotlin Programming Language
og:typewebsite
og:urlhttps://kotlinlang.org/
og:imagehttps://kotlinlang.org/assets/images/open-graph/general.png
og:descriptionKotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.
og:site_nameKotlin
charsetutf-8

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Page quality

Content
(Critically important)
This page contains 884 words. That's ok.
30.2% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
16 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 22.52 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 18 tags for this page.
Image SEO
(Somewhat important)
3 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...ver-6dd34ed75729683235a4f47d714a604e.pngkotlin
data:[...] Base64jetbrains logo
...ver-6dd34ed75729683235a4f47d714a604e.pngkotlin
...s-0-fc115b58a33ec07ad4b09b9c2d7952a9.pngKotlinConf 2025 Unpacked: Upcoming Language Features, AI-Powered Development, and Kotlin Multiplatform Upgrades
...s-1-cdfde4917530bcc4b8952505dadd1f31.pngStrengthening Kotlin for Backend Development: A Strategic Partnership With Spring
...s-2-e067e5ec95be24a4a1035f0c43a59fc8.pngMeet Koog: Empowering Kotlin Developers to Build AI Agents
...s-3-7234a59b041cf11a475ce14f9113bf79.pngQodana Case Study: How JetBrains Kotlin QA Scaled Quality for Kotlin 2.0
data:[...] Base64McDonald's
data:[...] Base64AWS
data:[...] Base64Philips
data:[...] Base64Adobe
data:[...] Base64Forbes
data:[...] Base64Atlassian
...iew-7b3351f5847838b3eed177968632b081.svgNo alt attribute provided
...ube.com/vi/JGvk4M0Rfxo/maxresdefault.jpgNo alt attribute provided
...iew-9786861824b00370498d2e3b6bfd57a3.pngNo alt attribute provided
data:[...] Base64JetBrains logo
data:[...] Base64Google logo
data:[...] Base64Meta logo
data:[...] Base64Gradle logo
data:[...] Base64Touchlab logo
data:[...] Base64Uber logo
data:[...] Base64Kotzilla logo
data:[...] Base64Block logo

Page structure

H1 heading
(Critically important)
Kotlin
The H1 heading consists of only one word. There should be more information given.
The H1 heading is too short (6 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Kotlin
H2 Latest news
H2 Kotlin in action
H2 Share code on your terms and for different platforms
H2 Kotlin + AI
H2 Big, friendly and helpful community
H2 Kotlin Foundation
H2 Start using Kotlin today!
H3 KotlinConf 2025 Unpacked: Upcoming Language Features, AI-Powered Development, and Kotlin Multiplatform Upgrades
H3 Strengthening Kotlin for Backend Development: A Strategic Partnership With Spring
H3 Meet Koog: Empowering Kotlin Developers to Build AI Agents
H3 Qodana Case Study: How JetBrains Kotlin QA Scaled Quality for Kotlin 2.0
H3 What you get with Kotlin + AI
H3 Build your own AI agents with Koog
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (33) on this page.

Found links on this page

LinkAttributesAnchor text
https://kotlinlang.org/No Text
https://github.com/JetBrains/k...New window External v2.1.21
https://kotlinlang.org/lp/mobile/Multiplatform
/lp/server-side/Server-side
/docs/data-science-overview.htmlData science
/docs/android-overview.htmlAndroid
/docs/home.htmlDocs
https://kotlinlang.org/community/Community
https://kotlinlang.org/education/Teach
https://play.kotlinlang.org/External Subdomain Playground
https://play.kotlinlang.org/by...External Subdomain Examples
https://play.kotlinlang.org/koansExternal Subdomain Koans
/docs/getting-started.htmlGet started
https://www.jetbrains.com/New window External Subdomain IMG-ALT jetbrains logo
https://blog.jetbrains.com/kot...New window External Subdomain May 22, 2025 KotlinConf 2025 Unpacked: Upcoming Language Features, AI-Powered Development, and Kotlin Multiplatform Upgrades Last updated: May 28, 2025 With ...
IMG-ALT KotlinConf 2025 Unpacked: Upcoming Language Features, AI-Powered Development, and Kotlin Multiplatform Upgrades
https://blog.jetbrains.com/kot...New window External Subdomain May 22, 2025 Strengthening Kotlin for Backend Development: A Strategic Partnership With Spring At JetBrains, we see Kotlin as a strong foundation for modern ...
IMG-ALT Strengthening Kotlin for Backend Development: A Strategic Partnership With Spring
https://blog.jetbrains.com/ai/...New window External Subdomain May 22, 2025 Meet Koog: Empowering Kotlin Developers to Build AI Agents We’ve got some exciting news for the Kotlin Community! At this year’s KotlinConf, we’...
IMG-ALT Meet Koog: Empowering Kotlin Developers to Build AI Agents
https://blog.jetbrains.com/qod...New window External Subdomain May 21, 2025 Qodana Case Study: How JetBrains Kotlin QA Scaled Quality for Kotlin 2.0 When we prepared to release IntelliJ IDEA support for Kotlin 2.0, a maj...
IMG-ALT Qodana Case Study: How JetBrains Kotlin QA Scaled Quality for Kotlin 2.0
https://blog.jetbrains.com/kot...External Subdomain Kotlin blog
/docs/getting-started.htmlText duplicate Get started
https://medium.com/mcdonalds-t...New window External McDonald's leverages Kotlin Multiplatform (KMP) for their global mobile app, enabling them to build a codebase that can be shared across platforms, removing ...
IMG-ALT McDonald's
https://talkingkotlin.com/qldb/New window External AWS opted for Kotlin over Java for Amazon Quantum Ledger Database (QLDB) thanks to its expressiveness and structured concurrency. They rewrote QLDB in Kotlin...
IMG-ALT AWS
https://www.youtube.com/watch?...New window External Subdomain Philips utilizes Kotlin Multiplatform in its HealthSuite digital platform mobile SDK. With KMP, they accelerated the implementation of new features and foste...
IMG-ALT Philips
https://blog.developer.adobe.c...New window External Subdomain Adobe Experience Platform chose Kotlin for server-side development because of its concise syntax, async capabilities, and interoperability with Java. This sh...
IMG-ALT Adobe
https://www.forbes.com/sites/f...New window External Subdomain By sharing over 80% of logic across iOS and Android, Forbes now rolls out new features simultaneously on both platforms, keeping the flexibility to withhold ...
IMG-ALT Forbes
https://www.youtube.com/watch?...New window External Subdomain Atlassian adopted Kotlin for the Jira Software cloud, leveraging its Java compatibility for seamless integration and minimizing migration challenges. Kotlin'...
IMG-ALT Atlassian
/lp/multiplatform/Learn about Kotlin Multiplatform
https://www.jetbrains.com/ai/External Subdomain Learn about JetBrains AI
/docs/kotlin-ai-apps-developme...Build AI apps with Kotlin
https://docs.koog.ai/External Subdomain Text duplicate Get started
https://kotlinlang.org/community/Join the community
https://kotlinfoundation.org/External Learn more
/docs/getting-started.htmlText duplicate Get started
https://github.com/JetBrains/k...New window External A-TITLE Kotlin on GitHub
https://twitter.com/kotlinNew window External A-TITLE Kotlin on Twitter
https://bsky.app/profile/kotli...New window External A-TITLE Kotlin on Bluesky
https://surveys.jetbrains.com/...New window External Subdomain A-TITLE Kotlin Slack
https://www.reddit.com/r/Kotlin/New window External Subdomain A-TITLE Kotlin on Reddit
https://stackoverflow.com/ques...New window External A-TITLE Kotlin on Stack Overflow
https://www.youtube.com/channe...New window External Subdomain A-TITLE Kotlin on YouTube
/docs/contribute.htmlContributing to Kotlin
A-TITLE Contributing to Kotlin
/docs/releases.htmlReleases
A-TITLE Releases
/assets/kotlin-media-kit.pdfPress Kit
A-TITLE Press Kit
/docs/security.htmlSecurity
A-TITLE Security
https://blog.jetbrains.com/kot...New window External Subdomain Blog
A-TITLE Blog
https://youtrack.jetbrains.com...New window External Subdomain Issue Tracker
A-TITLE Issue Tracker
/docs/kotlin-brand-assets.htmlNew window Brand Assets
A-TITLE Brand Assets
https://www.jetbrains.com/care...New window External Subdomain Anchor Careers
A-TITLE Careers
https://www.jetbrainsmerchandi...New window External Subdomain Kotlin Merch
A-TITLE Kotlin Merch
https://kotlinlang.org/Anchor Opt-Out
A-TITLE Opt-Out
https://jetbrains.com/New window External No Text
https://www.jetbrains.com/New window External Subdomain JetBrains
/foundation/kotlin-foundation....Kotlin Foundation
https://github.com/JetBrains/k...New window External Apache 2 license

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://kotlinlang.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.26 seconds.
The file size of the HTML document is fine (248 kB).

HTTP Response Header

NameValue
content-typetext/html; charset=utf-8
dateTue, 03 Jun 2025 02:38:20 GMT
last-modifiedWed, 28 May 2025 09:17:54 GMT
etagW/"7ee88660f5a02d70f3c62e488ca6f4cb"
x-amz-server-side-encryptionAES256
x-amz-meta-mtime1748423740
serverAmazonS3
content-encodinggzip
varyAccept-Encoding
x-cacheMiss from cloudfront
via1.1 13c8b9a0a39ad1238a922185ad5547fc.cloudfront.net (CloudFront)
x-amz-cf-popFRA60-P10
x-amz-cf-idxMou-EKHZ9c8Dn0naT-cyQTe7CHEyGy4JC9oqtgRGbXa6nLuPOcaSw==
x-xss-protection1; mode=block
x-frame-optionsSAMEORIGIN
referrer-policysame-origin
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 5,742 referring domains.
This page has 765,482 backlinks.
This page has backlinks from 3,970 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Host: kotlinlang.org

# Sitemaps
sitemap: https://kotlinlang.org/sitemap_index.xml

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kotlinlang.org
Kotlin Programming Language
Kotlin is a concise and multiplatform programming language by JetBrains. Enjoy coding and build server-side, mobile, web, and desktop applications efficiently.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Kotlin85%Check
Kotlin AI69%Check
Kotlin Multiplatform66%Check
Language63%Check
Kotlin Programming Language63%Check
using Kotlin59%Check
Programming Language57%Check
Build AI57%Check
build56%Check
Kotlin 2.056%Check
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