Tools & Wizards About Us
rotterdamis.com screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

rotterdamis.com

Rotterdam International School

Page Load Speed

12.7 sec in total

First Response

397 ms

Resources Loaded

3 sec

Page Rendered

9.3 sec

rotterdamis.com screenshot

About Website

Visit rotterdamis.com now to see the best up-to-date Rotterdam Is content and also check out these interesting facts you probably never knew about rotterdamis.com

Visit rotterdamis.com

Key Findings

We analyzed Rotterdamis.com page load time and found that the first response time was 397 ms and then it took 12.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

rotterdamis.com performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value5.2 s

59/100

10%

TBT (Total Blocking Time)

Value140 ms

96/100

30%

CLS (Cumulative Layout Shift)

Value0.743

6/100

15%

TTI (Time to Interactive)

Value5.2 s

74/100

10%

Network Requests Diagram

rotterdamis.com

397 ms

rotterdamis.com

807 ms

style.css

191 ms

css2

33 ms

fontawesome.min.css

35 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 44% of them (20 requests) were addressed to the original Rotterdamis.com, 27% (12 requests) were made to Res.cloudinary.com and 11% (5 requests) were made to Cdn.jsdelivr.net. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Rotterdamis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 119.7 kB (1%)

Content Size

10.6 MB

After Optimization

10.5 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Rotterdamis.com main page is 10.6 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 10.6 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 25.4 kB

  • Original 34.0 kB
  • After minification 29.1 kB
  • After compression 8.6 kB

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. This page needs HTML code to be minified as it can gain 4.9 kB, which is 14% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 25.4 kB or 75% of the original size.

Image Optimization

-1%

Potential reduce by 94.3 kB

  • Original 10.6 MB
  • After minification 10.5 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. Rotterdam Is images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 18 B

  • Original 4.8 kB
  • After minification 4.8 kB
  • After compression 4.8 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. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 6 (15%)

Requests Now

41

After Optimization

35

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rotterdam Is. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

rotterdamis.com

rotterdamis.com

397 ms

rotterdamis.com

rotterdamis.com

807 ms

style.css

style.css

191 ms

css2

css2

33 ms

fontawesome.min.css

fontawesome.min.css

35 ms

swiper-bundle.min.css

swiper-bundle.min.css

45 ms

sweetalert2.min.js

sweetalert2.min.js

50 ms

sweetalert2.min.css

sweetalert2.min.css

48 ms

27442b3215.js

27442b3215.js

250 ms

swiper-bundle.min.js

swiper-bundle.min.js

56 ms

css2

css2

16 ms

css2

css2

23 ms

footer-bg.png

footer-bg.png

791 ms

logo.png

logo.png

753 ms

xab9fowa5vmlqcnbh5lb.jpg

xab9fowa5vmlqcnbh5lb.jpg

288 ms

40

40

59 ms

qzxmas5z4vuunlx0hltd.jpg

qzxmas5z4vuunlx0hltd.jpg

345 ms

yoxgfbdisvxdyspeqsar.jpg

yoxgfbdisvxdyspeqsar.jpg

680 ms

qet8vgizh6qxow65k9wx.jpg

qet8vgizh6qxow65k9wx.jpg

357 ms

hcjowyiqvuonldcysm8a.jpg

hcjowyiqvuonldcysm8a.jpg

367 ms

byqv8vbmq0ngig5380cl.jpg

byqv8vbmq0ngig5380cl.jpg

327 ms

afiehfr2ta91dmjmzj72.jpg

afiehfr2ta91dmjmzj72.jpg

430 ms

xxuvdtmy9jwmplyyjvvf.jpg

xxuvdtmy9jwmplyyjvvf.jpg

360 ms

zg58bv8qqp0n1uuindio.jpg

zg58bv8qqp0n1uuindio.jpg

387 ms

yosj8i5ewahuddbx2b4o.jpg

yosj8i5ewahuddbx2b4o.jpg

392 ms

lmmoukknzjp5k5akgngr.jpg

lmmoukknzjp5k5akgngr.jpg

424 ms

ovvl6wmd6iotcc4vf3ca.jpg

ovvl6wmd6iotcc4vf3ca.jpg

401 ms

cbse.png

cbse.png

1297 ms

ris4.png

ris4.png

1338 ms

ris3.png

ris3.png

973 ms

class1.3.jpeg

class1.3.jpeg

1166 ms

lab.jpg

lab.jpg

976 ms

sports1.1.jpeg

sports1.1.jpeg

935 ms

bus1.4.jpeg

bus1.4.jpeg

1127 ms

doc1.1.jpeg

doc1.1.jpeg

1350 ms

dance1.1.jpeg

dance1.1.jpeg

1354 ms

class1.4.jpeg

class1.4.jpeg

1318 ms

cctv.jpg

cctv.jpg

1357 ms

gps.jpeg

gps.jpeg

1484 ms

principal.jpg

principal.jpg

1508 ms

footer-logo.png

footer-logo.png

1526 ms

chat-bot.png

chat-bot.png

1538 ms

font

font

41 ms

PAJJhLM6sSoWKfWCAAwDAjgbRAAB42mNgYGBkAIIbCZo5IPrmUn0hGA0AO8EFTQAA

PAJJhLM6sSoWKfWCAAwDAjgbRAAB42mNgYGBkAIIbCZo5IPrmUn0hGA0AO8EFTQAA

0 ms

font

font

24 ms

Accessibility Review

rotterdamis.com accessibility score

89

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

rotterdamis.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

rotterdamis.com SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rotterdamis.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Rotterdamis.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

rotterdamis.com

Open Graph description is not detected on the main page of Rotterdam Is. 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: