5.9 sec in total
251 ms
5.3 sec
406 ms
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Visit probo.nlWe analyzed Probo.nl page load time and found that the first response time was 251 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
probo.nl performance score
name
value
score
weighting
Value5.2 s
8/100
10%
Value7.9 s
3/100
25%
Value10.6 s
7/100
10%
Value2,440 ms
5/100
30%
Value0.022
100/100
15%
Value26.0 s
0/100
10%
251 ms
304 ms
476 ms
152 ms
161 ms
Our browser made a total of 336 requests to load all elements on the main page. We found that 90% of them (303 requests) were addressed to the original Probo.nl, 3% (10 requests) were made to Content.probo.nl and 1% (4 requests) were made to Stats.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (935 ms) relates to the external source Content.probo.nl.
Page size can be reduced by 1.1 MB (18%)
6.3 MB
5.1 MB
In fact, the total size of Probo.nl main page is 6.3 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 4.9 MB which makes up the majority of the site volume.
Potential reduce by 153.6 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 49.2 kB, which is 29% 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 153.6 kB or 90% of the original size.
Potential reduce by 23.7 kB
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. Probo images are well optimized though.
Potential reduce by 185.4 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 185.4 kB or 69% of the original size.
Potential reduce by 776.9 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. Probo.nl needs all CSS files to be minified and compressed as it can save up to 776.9 kB or 86% of the original size.
Number of requests can be reduced by 106 (33%)
320
214
The browser has sent 320 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Probo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 47 to 1 for JavaScripts and from 55 to 1 for CSS and as a result speed up the page load time.
probo.nl
251 ms
www.probo.nl
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global.css
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highdpi.css
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responsive-tables.css
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probo.nl accessibility score
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
[role]s do not have all required [aria-*] attributes
[aria-*] attributes are not valid or misspelled
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
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
Image elements do not have [alt] attributes
Links do not have a discernible name
probo.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
probo.nl SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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
Document uses legible font sizes
NL
NL
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Probo.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Probo.nl 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.
probo.nl
Open Graph data is detected on the main page of Probo. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: