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About Website

Welcome to rainbowapps.com homepage info - get ready to check Rainbowapps best content for Japan right away, or after learning these important things about rainbowapps.com

RainbowApps は、7000人が受講した日本最大のiPhone Android スマートフォンアプリ開発専門学校（講座）初心者・入門者から上級者まで受講。メディアでも多数紹介されました。Swift Java Kotlin Unity AmazonWeb Services各種プログラミング言語習得可能

Visit rainbowapps.com

rainbowapps.com

45 ms

Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Rainbowapps.com and no external sources were called. The less responsive or slowest element that took the longest time to load (45 ms) belongs to the original domain Rainbowapps.com.

Content Size

5.5 MB

After Optimization

5.2 MB

In fact, the total size of Rainbowapps.com main page is 5.5 MB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. Images take 5.4 MB which makes up the majority of the site volume.

HTML Optimization

-18%

Potential reduce by 36 B

Original 201 B
After minification 201 B
After compression 165 B

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 36 B or 18% of the original size.

Image Optimization

-4%

Potential reduce by 209.4 kB

Original 5.4 MB
After minification 5.2 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Rainbowapps images are well optimized though.

JavaScript Optimization

-80%

Potential reduce by 22.6 kB

Original 28.4 kB
After minification 19.0 kB
After compression 5.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 22.6 kB or 80% of the original size.

CSS Optimization

-86%

Potential reduce by 61.9 kB

Original 72.2 kB
After minification 48.6 kB
After compression 10.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Rainbowapps.com needs all CSS files to be minified and compressed as it can save up to 61.9 kB or 86% of the original size.

Requests Now

After Optimization

Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.

Language and Encoding

Language Detected

Language Claimed

N/A

Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rainbowapps.com can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Rainbowapps.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

rainbowapps.com

Open Graph description is not detected on the main page of Rainbowapps. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: