Tools & Wizards About Us

Report Summary

  • 28

    Performance

    Renders faster than
    48% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

kolbewindows.com

Kolbe Windows & Doors | Windows and doors for luxury homes and commercial buildings; custom orders welcome.

Page Load Speed

1.2 sec in total

First Response

59 ms

Resources Loaded

490 ms

Page Rendered

679 ms

About Website

Click here to check amazing Kolbe Windows content for United States. Otherwise, check out these important facts you probably never knew about kolbewindows.com

At Kolbe, our windows and doors are best known for superior quality, custom craftsmanship, attention to detail, as well as innovative and unique designs.

Visit kolbewindows.com

Key Findings

We analyzed Kolbewindows.com page load time and found that the first response time was 59 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

kolbewindows.com performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value23.5 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value980 ms

28/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value16.6 s

5/100

10%

Network Requests Diagram

kolbewindows.com

59 ms

loader.js

73 ms

style.min.css

40 ms

GetResource.ashx

89 ms

jquery-2.1.1.min.js

66 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 74% of them (43 requests) were addressed to the original Kolbewindows.com, 10% (6 requests) were made to Assets-us-01.kc-usercontent.com and 3% (2 requests) were made to App.usercentrics.eu. The less responsive or slowest element that took the longest time to load (275 ms) relates to the external source Use.fontawesome.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 120.2 kB (2%)

Content Size

6.5 MB

After Optimization

6.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kolbewindows.com main page is 6.5 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. 70% of websites need less resources to load. Images take 6.0 MB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 29.1 kB

  • Original 41.4 kB
  • After minification 38.5 kB
  • After compression 12.3 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. 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 29.1 kB or 70% of the original size.

Image Optimization

-1%

Potential reduce by 40.2 kB

  • Original 6.0 MB
  • After minification 6.0 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. Kolbe Windows images are well optimized though.

JavaScript Optimization

-9%

Potential reduce by 31.8 kB

  • Original 368.6 kB
  • After minification 368.6 kB
  • After compression 336.8 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.

CSS Optimization

-29%

Potential reduce by 19.0 kB

  • Original 64.5 kB
  • After minification 64.5 kB
  • After compression 45.5 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. Kolbewindows.com needs all CSS files to be minified and compressed as it can save up to 19.0 kB or 29% of the original size.

Requests Breakdown

Number of requests can be reduced by 27 (48%)

Requests Now

56

After Optimization

29

  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kolbe Windows. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

kolbewindows.com accessibility score

85

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

kolbewindows.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

kolbewindows.com SEO score

86

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kolbewindows.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 Kolbewindows.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

Open Graph data is detected on the main page of Kolbe Windows. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: