Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

Er mwyn darparu gwasanaethau hawdd, defnyddiol a dibynadwy i'n ymwelwyr, rydym weithiau yn gosod darnau bychan o wybodaeth ar eich dyfais fydd yn cael eu cadw a'u cofio y tro nesaf wnewch chi ymweld â'n gwefan. Maent yn cynnwys ffeiliau bychan a elwir yn gwcis.  Nid yw'r cwcis yn cael eu defnyddio i'ch hadnabod chi'n bersonol oherwydd dim ond dros dro maent yn gysylltiedig â'ch dyfais. 

Mae'r darnau o wybodaeth yn cael eu defnyddio i wella gwasanaethau i chi trewyThese pieces of information are used to improve services for you through, for example:

  • enabling a service to recognise your device so you don't have to give the same information during one task
  • recognising that you have already given a username and password so you don't need to enter it for every web page requested
  • measuring how many people are using services, so they can be made easier to use and that there is enough capacity to ensure they are fast
  • remembering your audience type selection so we can show you more relevant options and information

You can manage these small files yourself and learn more about them from

Cookies set by Cardiff University and third party cookies set on our sites may exist on the following domains:

as well as sub-domains of the above; for example, ''

Cookies for improving service (third party cookies)

In order to understand what you want to use and to ensure that the website is available when you want it, Google Analytics sets cookies to help us accurately estimate the number of visitors to the website and volumes of usage.

NameTypical contentExpires
_utmarandomly generated number2 years
_utmbrandomly generated number30 minutes
_utmcrandomly generated numberwhen you close your browser
_utmzrandomly generated number and information on how the site was reached (e.g. direct or via a link, organic search or paid search)6 months

For further details on the cookies set by Google Analytics, please refer to the Google Code website.

Cookies for sharing links to our website (third party cookies)

Sharing links to our website with others is made easier through the use of Twitter and Facebook Like Button services. These third-party services place a cookie on your device to make their service easier to use. To view and find out how to manage these cookies you can visit these websites directly: Twitter and Facebook.

NameTypical contentThird partyExpire
pid Twitter2 years
k Twitter7 days
guest_id Twitter2 years
datr Facebook2 years
lsd Facebookwhen you close your browser
reg_ext_ref Facebookwhen you close your browser
reg_fb_gate Facebookwhen you close your browser
reg_fb_ref Facebookwhen you close your browser

Additional third party cookies

The cookies listed below may be utilised by individual Schools or Divisions of the University for the improvement of services and should not contain personal identifying information.

NameTypical contentThird partyExpires
khcookieThese cookies are used by Google to store user preferences and information when viewing pages with Google maps on them.GoogleWhen you close your browser
NIDGoogle6 months
SNIDGoogle6 months
PREFGoogle2 years
VISITOR_INFO1_LIVERandom stringYouTube240 days
PREFYouTube preferences including the version number of Flash plugin installed for your browser - e.g. fv=10.1.102YouTube10 years

Other non-essential cookies (first party cookies)

NameTypical contentSiteExpires
cu-homepage-tabselectThe name of the selected tab e.g. 'postgraduate' and year
cf_aztabnumerical value (0-29) you close your browser
style'Light on dark' or 'Dark on light' - stylesheet year
has_js1 or you close your browser
hashrandom stringearth.cardiff40 days
random stringEnginwhen you close your browser
random stringEnginwhen you close your browser
random stringEnginwhen you close your browser
random stringconcerts.cardiff3 weeks
jfcookie[lang]'en' or 'cy'walesdeanery.org1 day
RokMicroNewsContent selection to be displayedwalesdeanery.org30 days
random stringwalesdeanery.orgwhen you close your browser

Cookies not listed above

Cookies set from our domains but not listed above can be reported to us at

Essential cookies (first party cookies)

These cookies are essential for the operation of the Cardiff University website. They are set upon your arrival to our website and deleted when you close or quit your web browser. These cookies will be recreated the next time you load one of our web pages provided that you simply deleted the cookies by closing your web browser and not blocking them by managing your cookie settings.

NameTypical contentExpiresNotes
JSESSIONIDrandomly generated numberwhen you close your browser 
ASP.NET_SessionIdrandomly generated numberwhen you close your browser 
NSC_vojxfc-hspvqrandomly generated number2 minutes 
tg_sessionrandomly generated stringwhen you close your browserNecessary to use the jobs site
tg_session_30011_5460randomly generated stringwhen you close your browserNecessary to use the jobs site

Cookie and Privacy Information for Blackboard Learn

Additional cookies

Cookies may be set by individual web services operated by the University and are strictly necessary for the operation of those services for the benefit of our Staff and/or Students.

Mobile applications

Mobile applications/websites produced by Cardiff University may also use Google Analytics cookies to help us improve their performance.

NameTypical contentExpires
_utmarandomly generated number2 years
_utmbrandomly generated number30 minutes
_utmcrandomly generated numberwhen you close your browser
_utmzrandomly generated number and information on how the site was reached (e.g. direct or via a link, organic search or paid search)6 months

Site data — application cache

The application may store information, graphics and scripts locally on your device to save bandwidth and to improve the performance of the app. This may be referred to in your cookie management control panel as 'Application Cache'. Deleting this information will force the application to re-load the data when it is next opened, some settings and information stored in this data will also be removed.

To manage individual cookies or to enable blocking of cookies please refer to the documentation for your browser. Cardiff University is not responsible for the content of external websites and these links are provided for your convenience

Further information

Any changes to this policy and additions to the list of cookies will be made on these pages.

Cardiff University reserves the right to make changes to these policy documents without notice.

If you have any queries about these cookies or would like more information about them, please email the web support team at