Access colourenvelopes.co.uk. Robot Challenge Screen

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value1,830 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.319

36/100

15%

TTI (Time to Interactive)

Value20.9 s

2/100

10%

colourenvelopes.co.uk

220 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 Colourenvelopes.co.uk and no external sources were called. The less responsive or slowest element that took the longest time to load (220 ms) belongs to the original domain Colourenvelopes.co.uk.

Content Size

919.9 kB

After Optimization

785.9 kB

In fact, the total size of Colourenvelopes.co.uk main page is 919.9 kB. 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. Javascripts take 572.9 kB which makes up the majority of the site volume.

HTML Optimization

-13%

Potential reduce by 23 B

Original 177 B
After minification 177 B
After compression 154 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 23 B or 13% of the original size.

Image Optimization

-17%

Potential reduce by 38.9 kB

Original 232.8 kB
After minification 193.9 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. Obviously, Colourenvelopes needs image optimization as it can save up to 38.9 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-11%

Potential reduce by 65.3 kB

Original 572.9 kB
After minification 572.5 kB
After compression 507.6 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 65.3 kB or 11% of the original size.

CSS Optimization

-26%

Potential reduce by 29.9 kB

Original 114.0 kB
After minification 114.0 kB
After compression 84.2 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. Colourenvelopes.co.uk needs all CSS files to be minified and compressed as it can save up to 29.9 kB or 26% 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.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

Search Engine Optimization Advices

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

High

Links are not crawlable

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Colourenvelopes.co.uk 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 Colourenvelopes.co.uk 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

colourenvelopes.co.uk

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