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kotlinlang.org

Website review kotlinlang.org

 Generated on May 26 2017 03:25 AM

Old statistics? UPDATE !


The score is 43/100

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SEO Content
Title

Kotlin Programming Language



Length : 27

Perfect, your title contains between 10 and 70 characters.
Description



Length : 0

Very bad. We haven't found meta description on your page. Use this free online meta tags generator to create description.
Keywords



Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create keywords.
Og Meta Properties Good, your page take advantage of Og Properties.
Property Content
title Kotlin Programming Language
type website
url https://kotlinlang.org/
image https://kotlinlang.org/assets/images/open-graph/kotlin_250x250.png
description Kotlin is a statically typed programming language for the JVM, Android and the browser, 100% interoperable with Java
site_name Kotlin
Headings
H1 H2 H3 H4 H5 H6
0 6 20 0 0 0
  • [H2] Build Applications For
  • [H2] Why Kotlin?
  • [H2] What does it look like?
  • [H2] Try Kotlin
  • [H2] Kotlin Usage Highlights
  • [H2] Stay in touch
  • [H3] Concise
  • [H3] Safe
  • [H3] Interoperable
  • [H3] Tool-friendly
  • [H3] Concise
  • [H3] Safe
  • [H3] Interoperable
  • [H3] Tooling
  • [H3] IntelliJ IDEA
  • [H3] Android Studio
  • [H3] Eclipse
  • [H3] Compiler
  • [H3] Pinterest
  • [H3] Gradle
  • [H3] Evernote
  • [H3] Uber
  • [H3] Corda
  • [H3] Coursera
  • [H3] Pivotal
  • [H3] Atlassian
Images We found 2 images on this web page.

Good, most or all of your images have alt attributes
Text/HTML Ratio Ratio : 0%

This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
Flash Perfect, no Flash content has been detected on this page.
Iframe Too Bad, you have Iframes on the web pages, this mean that content in an Iframe cannot be indexed.

URL Rewrite Good. Your links looks friendly!
Underscores in the URLs We have detected underscores in your URLs. You should rather use hyphens to optimize your SEO.
In-page links We found a total of 21 links including 1 link(s) to files



Anchor Type Juice
Kotlin Internal Passing Juice
Learn Internal Passing Juice
Community Internal Passing Juice
Try Online Internal Passing Juice
read more External Passing Juice
More examples in the full language documentation Internal Passing Juice
Try online Internal Passing Juice
Instructions Internal Passing Juice
Studio 3.0 External Passing Juice
Instructions Internal Passing Juice
Instructions Internal Passing Juice
Download Compiler Internal Passing Juice
introduced Kotlin External Passing Juice
introducing Kotlin External Passing Juice
integrated Kotlin External Passing Juice
uses Kotlin External Passing Juice
built entirely in Kotlin External Passing Juice
partially written External Passing Juice
use of Kotlin's language features External Passing Juice
Trello Android External Passing Juice
JetBrains External Passing Juice

SEO Keywords
Keywords Cloud
Keywords Consistency
Keyword Content Title Keywords Description Headings

Usability
Url Domain : kotlinlang.org
Length : 14
Favicon Great, your website has a favicon.
Printability We could not find a Print-Friendly CSS.
Language You have not specified the language. Use this free meta tags generator to declare the intended language of your website.
Dublin Core This page does not take advantage of Dublin Core.

Document
Doctype HTML 5
Encoding Perfect. Your declared charset is UTF-8.
W3C Validity Errors : 2
Warnings : 3
Email Privacy Great no email address has been found in plain text!
Deprecated HTML Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
Excellent, your website doesn't use nested tables.
Too bad, your website is using inline styles.
Great, your website has few CSS files.
Perfect, your website has few JavaScript files.
Perfect, your website takes advantage of gzip.

Mobile
Mobile Optimization
Apple Icon
Meta Viewport Tag
Flash content

Optimization
XML Sitemap Great, your website has an XML sitemap.

http://kotlinlang.org/sitemap.xml
Robots.txt Missing

Your website doesn't have a robots.txt file - this can be problematic.

A robots.txt file allows you to restrict the access of search engine robots that crawl the web and it can prevent these robots from accessing specific directories and pages. It also specifies where the XML sitemap file is located.
Analytics Missing

We didn't detect an analytics tool installed on this website.

Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.

PageSpeed Insights

54 / 100    Speed
  Should Fix:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

  • http://kotlinlang.org/_assets/static/css/com/layout/images/index-page-header-bg.jpg (expiration not specified)
  • http://kotlinlang.org/_assets/static/css/com/layout/images/main-sprite@2x.png (expiration not specified)
  • http://kotlinlang.org/_assets/static/js/page/index/images/kotlin-community-sprite@2x.png (expiration not specified)
  • http://kotlinlang.org/assets/fonts/GraublauSlab-Regular-webfont.woff (expiration not specified)
  • http://kotlinlang.org/assets/images/index/features/tooling/tooling1%402x.png (expiration not specified)
  • http://kotlinlang.org/assets/images/index/features/tooling/tooling2%402x.png (expiration not specified)
  • http://munchkin.marketo.net/munchkin.js (expiration not specified)
  • http://resources.jetbrains.com/storage/ui/logos/logos.css (expiration not specified)
  • https://www.googletagmanager.com/gtm.js?id=GTM-5P98 (15 minutes)
  • http://cse.google.com/adsense/search/async-ads.js (60 minutes)
  • http://www.google-analytics.com/plugins/ua/ec.js (60 minutes)
  • http://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
  • http://www.google.com/jsapi?autoload=%7B%22modules%22%3A%5B%7B%22name%22%3A%22search%22%2C%22version%22%3A%221.0%22%2C%22callback%22%3A%22__gcse.scb%22%2C%22style%22%3A%22http%3A%2F%2Fwww.google.com%2Fcse%2Fstatic%2Fstyle%2Flook%2Fdefault.css%22%2C%22language%22%3A%22en%22%7D%5D%7D (60 minutes)
  • http://www.google-analytics.com/analytics.js (2 hours)
Show how to fix
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 5 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Optimize CSS Delivery of the following:

  • http://kotlinlang.org/_assets/styles.css?build=917
  • http://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400italic,700italic,400,700
  • http://fonts.googleapis.com/css?family=Droid+Sans+Mono
  • http://resources.jetbrains.com/storage/ui/logos/logos.css
  • http://kotlinlang.org/_assets/index.css?build=917
Show how to fix
Optimize images
Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 250KiB (68% reduction).

  • Compressing http://kotlinlang.org/_assets/static/css/com/layout/images/index-page-header-bg.jpg could save 191.4KiB (83% reduction).
  • Compressing http://kotlinlang.org/assets/images/index/features/tooling/tooling2%402x.png could save 37KiB (43% reduction).
  • Compressing http://kotlinlang.org/assets/images/index/features/tooling/tooling1%402x.png could save 21.6KiB (43% reduction).
Show how to fix
  Consider Fixing:
Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 3.9KiB (40% reduction).

  • Minifying http://www.google.com/uds/api/search/1.0/890e228675e68570fa203500d9572ad4/default+en.css could save 3.9KiB (40% reduction) after compression.
Show how to fix
  6 Passed Rules
Show details
Avoid landing page redirects

Your page has no redirects. Learn more about avoiding landing page redirects.

Enable compression

You have compression enabled. Learn more about enabling compression.

Reduce server response time

Your server responded quickly. Learn more about server response time optimization.

Minify HTML

Your HTML is minified. Learn more about minifying HTML.

Minify JavaScript

Your JavaScript content is minified. Learn more about minifying JavaScript.

Prioritize visible content

You have the above-the-fold content properly prioritized. Learn more about prioritizing visible content.

81 / 100    User Experience
  Should Fix:
Configure the viewport
Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

Configure a viewport for this page.

Show how to fix
Use legible font sizes
The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

  • TRY ONLINE and 2 others render only 5 pixels tall (14 CSS pixels) final.
  • 100% interoper…™ and Android™ renders only 6 pixels tall (16 CSS pixels) final.
  • TRY KOTLIN renders only 7 pixels tall (18 CSS pixels) final.
  • read more renders only 7 pixels tall (18 CSS pixels) final.
  • Android and 2 others render only 5 pixels tall (14 CSS pixels) final.
  • Native and 1 others render only 5 pixels tall (14 CSS pixels) final.
  • Avoid entire c…er exceptions. and 3 others render only 5 pixels tall (14 CSS pixels) final.
  • See example and 3 others render only 5 pixels tall (14 CSS pixels) final.
  • Simplest Version renders only 5 pixels tall (14 CSS pixels) final.
  • An “Object-oriented” Hello and 2 others render only 5 pixels tall (14 CSS pixels) final.
  • Concise, simpl…ad (and write) renders only 7 pixels tall (18 CSS pixels) final.
  • Package-level…as a parameter and 3 others render only 5 pixels tall (14 CSS pixels).
  • More examples…documentation renders only 7 pixels tall (18 CSS pixels).
  • Explore Kotlin…solve problems and 2 others render only 7 pixels tall (18 CSS pixels).
  • STANDALONE and 3 others render only 5 pixels tall (14 CSS pixels).
  • Bundled with C…IDEA Ultimate and 4 others render only 5 pixels tall (14 CSS pixels).
  • Instructions and 3 others render only 5 pixels tall (14 CSS pixels).
  • use of Kotlin'…guage features and 8 others render only 5 pixels tall (14 CSS pixels).
  • Latest version: 1.1.2-2 renders only 6 pixels tall (16 CSS pixels).
  • is an open-sou…jor banks, and and 15 others render only 5 pixels tall (14 CSS pixels).
  • ISSUE TRACKER and 3 others render only 5 pixels tall (12 CSS pixels).
  • © 2000–2017 Je…ights reserved renders only 5 pixels tall (14 CSS pixels).
  • Sponsored and developed by renders only 5 pixels tall (14 CSS pixels).
  • Cookies help u…se of cookies. and 2 others render only 5 pixels tall (12 CSS pixels) final.
  • learn more renders only 5 pixels tall (12 CSS pixels) final.
  • ~ root$ renders only 5 pixels tall (12 CSS pixels) final.
Show how to fix
  Consider Fixing:
Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

  • The tap target <a href="https://github…tBrains/kotlin" class="link link-github"></a> is close to 1 other tap targets final.
  • The tap target <a href="https://twitter.com/kotlin" class="link link-twitter"></a> and 1 others are close to other tap targets final.
  • The tap target <div class="search-button"></div> is close to 1 other tap targets final.
  • The tap target <div class="tab js-tab">HTML Builder</div> is close to 1 other tap targets final.
  • The tap target <div class="tab js-tab">HTML Builder</div> is close to 1 other tap targets final.
Show how to fix
  2 Passed Rules
Show details
Avoid plugins

Your page does not appear to use plugins, which would prevent content from being usable on many platforms. Learn more about the importance of avoiding plugins.

Size content to viewport

The contents of your page fit within the viewport. Learn more about sizing content to the viewport.

71 / 100    Speed
  Should Fix:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 5 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Optimize CSS Delivery of the following:

  • http://kotlinlang.org/_assets/styles.css?build=917
  • http://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400italic,700italic,400,700
  • http://fonts.googleapis.com/css?family=Droid+Sans+Mono
  • http://resources.jetbrains.com/storage/ui/logos/logos.css
  • http://kotlinlang.org/_assets/index.css?build=917
Show how to fix
Optimize images
Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 203.4KiB (61% reduction).

  • Compressing http://kotlinlang.org/_assets/static/css/com/layout/images/index-page-header-bg.jpg could save 191.4KiB (83% reduction).
  • Compressing http://kotlinlang.org/assets/images/index/features/tooling/tooling2.png could save 7.2KiB (12% reduction).
  • Compressing http://kotlinlang.org/assets/images/index/features/tooling/tooling1.png could save 4.8KiB (13% reduction).
Show how to fix
  Consider Fixing:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

  • http://kotlinlang.org/_assets/static/css/com/layout/images/index-page-header-bg.jpg (expiration not specified)
  • http://kotlinlang.org/_assets/static/css/com/layout/images/main-sprite.png (expiration not specified)
  • http://kotlinlang.org/assets/fonts/GraublauSlab-Regular-webfont.woff (expiration not specified)
  • http://kotlinlang.org/assets/images/index/features/tooling/tooling1.png (expiration not specified)
  • http://kotlinlang.org/assets/images/index/features/tooling/tooling2.png (expiration not specified)
  • http://munchkin.marketo.net/munchkin.js (expiration not specified)
  • http://resources.jetbrains.com/storage/ui/logos/logos.css (expiration not specified)
  • https://www.googletagmanager.com/gtm.js?id=GTM-5P98 (15 minutes)
  • http://cse.google.com/adsense/search/async-ads.js (60 minutes)
  • http://www.google-analytics.com/plugins/ua/ec.js (60 minutes)
  • http://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
  • http://www.google.com/jsapi?autoload=%7B%22modules%22%3A%5B%7B%22name%22%3A%22search%22%2C%22version%22%3A%221.0%22%2C%22callback%22%3A%22__gcse.scb%22%2C%22style%22%3A%22http%3A%2F%2Fwww.google.com%2Fcse%2Fstatic%2Fstyle%2Flook%2Fdefault.css%22%2C%22language%22%3A%22en%22%7D%5D%7D (60 minutes)
  • http://www.google-analytics.com/analytics.js (2 hours)
Show how to fix
Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 3.9KiB (40% reduction).

  • Minifying http://www.google.com/uds/api/search/1.0/890e228675e68570fa203500d9572ad4/default+en.css could save 3.9KiB (40% reduction) after compression.
Show how to fix
  6 Passed Rules
Show details
Avoid landing page redirects

Your page has no redirects. Learn more about avoiding landing page redirects.

Enable compression

You have compression enabled. Learn more about enabling compression.

Reduce server response time

Your server responded quickly. Learn more about server response time optimization.

Minify HTML

Your HTML is minified. Learn more about minifying HTML.

Minify JavaScript

Your JavaScript content is minified. Learn more about minifying JavaScript.

Prioritize visible content

You have the above-the-fold content properly prioritized. Learn more about prioritizing visible content.

* The results are cached for 30s. If you have made changes to your page, please wait for 30s before re-running the test.

Site Desk