5.6 sec in total
451 ms
4.8 sec
431 ms
Click here to check amazing 02 content for United Kingdom. Otherwise, check out these important facts you probably never knew about 02.co.uk
Find exclusive offers and discover Switch Up, Flexible Superfast 5G Tariffs, Free Roaming & O2 Priority. Stay connected, wherever you are.
Visit 02.co.ukWe analyzed 02.co.uk page load time and found that the first response time was 451 ms and then it took 5.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
02.co.uk performance score
name
value
score
weighting
Value10.1 s
0/100
10%
Value12.1 s
0/100
25%
Value18.1 s
0/100
10%
Value12,500 ms
0/100
30%
Value0.05
99/100
15%
Value26.7 s
0/100
10%
451 ms
190 ms
537 ms
526 ms
537 ms
Our browser made a total of 97 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original 02.co.uk, 60% (58 requests) were made to Static.o2.co.uk and 4% (4 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Servedby.o2.co.uk.
Page size can be reduced by 3.1 MB (70%)
4.4 MB
1.3 MB
In fact, the total size of 02.co.uk main page is 4.4 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. 65% of websites need less resources to load. CSS take 2.2 MB which makes up the majority of the site volume.
Potential reduce by 500.4 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 500.4 kB or 83% of the original size.
Potential reduce by 4.4 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. 02 images are well optimized though.
Potential reduce by 522.7 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 522.7 kB or 67% of the original size.
Potential reduce by 2.1 MB
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. 02.co.uk needs all CSS files to be minified and compressed as it can save up to 2.1 MB or 94% of the original size.
Number of requests can be reduced by 61 (66%)
92
31
The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 02. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 36 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
02.co.uk
451 ms
www.o2.co.uk
190 ms
fonts.css
537 ms
custom-classes.css
526 ms
global.css
537 ms
_all-modules.css
701 ms
background.css
798 ms
satelliteLib-0f7d9589551ed7071db2509e1b92aadeff17ecd3.js
24 ms
modernizr.min.js
539 ms
require.js
611 ms
main.js
607 ms
liveperson.js
608 ms
le-mtagconfig.js
625 ms
egain.js
691 ms
mbox.js
727 ms
edigitalresearch.js
725 ms
eluminate.js
34 ms
analytics.js
726 ms
tracking.min.js
776 ms
id
117 ms
EG36499597
88 ms
target.js
56 ms
standard
607 ms
tag.js
83 ms
jquery-2.0.3.min.js
190 ms
le-mtagconfig.js
89 ms
id
13 ms
tracker
366 ms
allow_cobrowse.js
491 ms
Offers.egain
499 ms
.jsonp
45 ms
o2.min.js
97 ms
plugins.jquery.js
90 ms
tool-icon-search-sprite.png
95 ms
toolbar-sitetabs.png
89 ms
logo-o2.svg
94 ms
primary-nav-border.png
90 ms
logo-telefonica.svg
90 ms
trans-1px.png
93 ms
standard
108 ms
wtr_homepage_background_3000.jpg
758 ms
frutiger-55roman.woff
336 ms
frutiger-45light.woff
337 ms
global.css
153 ms
hero-xxl-background-1100.png
153 ms
data-heavy-sim-hero-xxl-1100-dark-160216%5B1%5D.png
435 ms
smart-tech-hero-xxl-dark-1100-290216%5B1%5D.png
393 ms
six-nations-wear-rose-hero-xxl-1100-dark-160316%5B1%5D.png
702 ms
iphone-6s-combo-promo-m-tall-dark-1100-180915.jpg
384 ms
promo-cta-arrow.png
299 ms
samsung-galaxy-s7-s7-edge-promo-m-tall-light-1100_070316%5B1%5D.jpg
387 ms
with-love-from-o2-promo-m-short-1100-150216%5B1%5D.jpg
472 ms
o2-drive-promo-m-short-1100-dark-210116%5B1%5D.jpg
475 ms
tech-21-promo-m-short-1100-dark-100316%5B1%5D-1.jpg
474 ms
click-collect-promo-m-short-815-1100-plain-dark-020715.jpg
517 ms
guru-help-male-01-promo-s-short-light_1100_230415-1.jpg
559 ms
nspcc-promo-s-short-light-1100-020915-1.jpg
561 ms
o2-recycle-promo-s-short-light-1100-291215.jpg
561 ms
arrow_blue.png
602 ms
hero.init.js
624 ms
woy-2015-footer-tile-plain-light-191115.png
625 ms
footer-gradient-mobile.png
615 ms
footer-bubbles.png
655 ms
footer-list-splitter.png
692 ms
footer-sprite-social-icons.png
701 ms
sprite-logo-telefonica.png
701 ms
promoSRecycle.js
702 ms
1248 ms
ga.js
81 ms
s-code-contents-d2e3f58d3f18050c00cfdd4af1ece2cc04457830.js
78 ms
tool-icon-signin.png
637 ms
tool-icon-webchat.png
642 ms
tool-icon-storelocator.png
674 ms
__utm.gif
32 ms
s35574035951867
14 ms
cobrowseconfig.jsp
108 ms
jquery.hoverintent.js
165 ms
hero.jquery.js
167 ms
carousel.jquery.js
169 ms
Ajax.aspx
437 ms
conversion.js
21 ms
6 ms
38 ms
fbds.js
20 ms
13 ms
x28628r1774347
61 ms
src=4217150;type=homep0;cat=dbmo20;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=4091942361555.9937
32 ms
328 ms
bat.js
52 ms
29 ms
30 ms
35 ms
43 ms
pixel
21 ms
32 ms
28 ms
checkSession.html
83 ms
02.co.uk 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
button, link, and menuitem elements do not have accessible names.
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
Definition list items are not wrapped in <dl> elements
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
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
02.co.uk 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
02.co.uk SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 02.co.uk 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 02.co.uk main page’s claimed encoding is iso-8859-1. 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.
02.co.uk
Open Graph description is not detected on the main page of 02. 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: