4 sec in total
276 ms
3.5 sec
202 ms
Click here to check amazing O2 content for United Kingdom. Otherwise, check out these important facts you probably never knew about o2.co.uk
Find exclusive offers and discover Switch Up, Flexible Superfast 5G Tariffs, Free Roaming & O2 Priority. Stay connected, wherever you are.
Visit o2.co.ukWe analyzed O2.co.uk page load time and found that the first response time was 276 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
o2.co.uk performance score
name
value
score
weighting
Value17.3 s
0/100
10%
Value20.4 s
0/100
25%
Value17.3 s
0/100
10%
Value3,990 ms
1/100
30%
Value0.087
93/100
15%
Value38.0 s
0/100
10%
276 ms
512 ms
530 ms
532 ms
540 ms
Our browser made a total of 96 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original O2.co.uk, 60% (58 requests) were made to Static.o2.co.uk and 5% (5 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Chat.o2.co.uk.
Page size can be reduced by 5.7 MB (77%)
7.3 MB
1.7 MB
In fact, the total size of O2.co.uk main page is 7.3 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. 55% of websites need less resources to load. CSS take 4.8 MB which makes up the majority of the site volume.
Potential reduce by 467.1 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 467.1 kB or 84% of the original size.
Potential reduce by 27.5 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. O2 images are well optimized though.
Potential reduce by 682.2 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 682.2 kB or 70% of the original size.
Potential reduce by 4.5 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. O2.co.uk needs all CSS files to be minified and compressed as it can save up to 4.5 MB or 94% of the original size.
Number of requests can be reduced by 62 (68%)
91
29
The browser has sent 91 CSS, Javascripts, AJAX and image requests in order to completely render the main page of O2. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 35 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
o2.co.uk
276 ms
www.o2.co.uk
512 ms
fonts.css
530 ms
custom-classes.css
532 ms
global.css
540 ms
_all-modules.css
713 ms
background.css
832 ms
satelliteLib-0f7d9589551ed7071db2509e1b92aadeff17ecd3.js
104 ms
modernizr.min.js
547 ms
require.js
614 ms
main.js
618 ms
liveperson.js
618 ms
le-mtagconfig.js
647 ms
egain.js
701 ms
mbox.js
706 ms
edigitalresearch.js
708 ms
eluminate.js
13 ms
analytics.js
739 ms
tracking.min.js
787 ms
id
49 ms
EG36499597
103 ms
target.js
12 ms
standard
111 ms
tag.js
61 ms
jquery-2.0.3.min.js
179 ms
le-mtagconfig.js
101 ms
id
10 ms
.jsonp
75 ms
tracker
362 ms
allow_cobrowse.js
1312 ms
Offers.egain
1320 ms
tool-icon-search-sprite.png
106 ms
toolbar-sitetabs.png
107 ms
logo-o2.svg
98 ms
primary-nav-border.png
104 ms
logo-telefonica.svg
100 ms
trans-1px.png
144 ms
standard
107 ms
frutiger-55roman.woff
351 ms
frutiger-45light.woff
361 ms
o2.min.js
137 ms
plugins.jquery.js
137 ms
global.css
96 ms
hero-xxl-background-1100.png
91 ms
data-heavy-sim-hero-xxl-1100-dark-160216%5B1%5D.png
500 ms
sony-photobox-offer-hero-xxl-dark-1100-220216%5B1%5D.png
353 ms
six-nations-wear-rose-hero-xxl-1100-dark-030216%5B1%5D.png
355 ms
iphone-6s-combo-promo-m-tall-dark-1100-180915.jpg
274 ms
promo-cta-arrow.png
306 ms
s7-jabra-promo-m-tall-1100-dark-160216%5B1%5D.jpg
308 ms
with-love-from-o2-promo-m-short-1100-150216%5B1%5D.jpg
375 ms
o2-drive-promo-m-short-1100-dark-210116%5B1%5D.jpg
402 ms
myo2-promo-m-short-1100-dark-211015-1.jpg
402 ms
click-collect-promo-m-short-815-1100-plain-dark-020715.jpg
440 ms
guru-help-male-01-promo-s-short-light_1100_230415-1.jpg
437 ms
nspcc-promo-s-short-light-1100-020915-1.jpg
468 ms
o2-recycle-promo-s-short-light-1100-291215.jpg
484 ms
arrow_blue.png
484 ms
hero.init.js
519 ms
label-xxl-shadow1100.png
526 ms
woy-2015-footer-tile-plain-light-191115.png
552 ms
footer-gradient-mobile.png
558 ms
footer-bubbles.png
563 ms
footer-list-splitter.png
566 ms
footer-sprite-social-icons.png
603 ms
sprite-logo-telefonica.png
615 ms
promoSRecycle.js
640 ms
313 ms
ga.js
15 ms
s-code-contents-d2e3f58d3f18050c00cfdd4af1ece2cc04457830.js
132 ms
__utm.gif
27 ms
tool-icon-signin.png
582 ms
tool-icon-webchat.png
583 ms
tool-icon-storelocator.png
595 ms
s37438257329631
7 ms
conversion.js
16 ms
7 ms
57 ms
fbds.js
16 ms
15 ms
x28628r8942112
17 ms
src=4217150;type=homep0;cat=dbmo20;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=6567350015975.535
33 ms
210 ms
bat.js
31 ms
34 ms
40 ms
41 ms
35 ms
pixel
19 ms
jquery.hoverintent.js
170 ms
hero.jquery.js
188 ms
carousel.jquery.js
212 ms
7 ms
3 ms
4 ms
Ajax.aspx
865 ms
o2.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
o2.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
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
o2.co.uk 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
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 O2.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 O2.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.
o2.co.uk
Open Graph description is not detected on the main page of O2. 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: