What are cookies?

Cookies are small pieces of data, stored in text files, that are stored on your computer or other devices when websites are loaded in a browser. They are widely used to remember you and your preferences, either for a single visit (through a session cookie) or for multiple repeat visits (using a persistent cookie). They ensure a consistent and efficient experience for visitors and perform essential functions, such as allowing users to register and remain logged in.

Cookies may be set by the site that you are visiting (known as first party cookies), or by other websites who serve up content on that site (third party cookies).

Cookies set by Jetpack

Cookies are used by Jetpack in a variety of ways. The cookies set will depend on the specific features that are enabled on a site. The cookies are only set when a user interacts with one of these features, or to allow admin functions to be performed from within the site’s dashboard (/wp-admin).

Further details are provided in the following tables, which list the various cookies that are set for visitors and registered users of sites with the Jetpack plugin installed.

Visitor cookies

9to5 Comments

Cookie Name Duration Purpose
comment_author_{HASH} 347 days Remembers the value entered into the comment form‘s name field. Specific to the site from which it is set. This cookie mirrors one set by the core WordPress software for commenting purposes.
comment_author_email_{HASH} 347 days Remembers the value entered into the comment form‘s email field. Specific to the site from which it is set. This cookie mirrors one set by the core WordPress software for commenting purposes.
comment_author_url_{HASH} 347 days Remembers the value entered into the comment form‘s URL field. Specific to the site from which it is set. This cookie mirrors one set by the core WordPress software for commenting purposes

 

Mobile Theme

Cookie Name Duration Purpose
akm_mobile 3.5 days Remembers whether or not a user wishes to view the mobile version of a site.

 

Subscriptions

Cookie Name Duration Purpose
jetpack_comments_subscribe_{HASH} 347 days Remembers the state of the post and comment subscription checkboxes.
jetpack_blog_subscribe_{HASH} 347 days Remembers the state of the post and comment subscription checkboxes.

 

EU Cookie Law Banner

Cookie Name Duration Purpose
eucookielaw 30 days Remembers the state of visitor acceptance to the EU Cookie Law banner.

 

Registered user/admin cookies

 

General

Cookie Name Duration Purpose
jetpackState[message] session Stores the state message passed back to the user across requests
regarding module activation.
jetpackState[error] session Stores the state’s error type passed back to the user across requests regarding module activation.
jetpackState[error_description] session Stores the state’s error description passed back to the user across requests regarding module activation.
jetpackState[module] session Stores the state’s module name passed back to the user across requests regarding module activation.
jetpackState[privacy_checks] session Stores modules that may require additional privacy-related verification for private sites so that we can properly communicate these to the user.
jetpackState[php_errors] session Stores any PHP errors found just before PHP shuts down execution.
jetpackState[deactivated_plugins] session Stores the names of any standalone plugins that needed to be deactivated by Jetpack so that these can be communicated back to the user.
jetpackState[network_nag] session Stores a true value if Jetpack is network-activated, and the plugin needs to communicate to the user that they must connect it on each child site of the network.

 

Jetpack Protect

Cookie Name Duration Purpose
jpp_math_pass 1 day Remembers if a user has successfully completed a math captcha to prove that they’re a real human.

 

Secure Sign On

Cookie Name Duration Purpose
jetpack_sso_redirect_to 1 hour Allows for redirect URLs to be stored, which is necessary for Secure Sign On to work.
jetpack_sso_remember_me 1 hour Stores me values locally, rather than requiring them to be passed to WordPress.com each time.
jetpack_sso_wpcom_name_{HASH} 1 week or cleared after successful login Remembers the WordPress.com display name to show on login page.
jetpack_sso_wpcom_gravatar_{HASH} 1 week or cleared after successful login Remembers URL of the Gravatar image to show on login page.
jetpack_sso_original_request 1 hour Stores the URL of the original login request.
jetpack_sso_nonce 10 minutes Used for nonce verification.

 

Stats

Cookie Name Duration Purpose
stnojs 2 days The Stats feature sets this admin-area-only cookie if the user requests to view stats reports without javascript turned on.

 

Registered on the site, but not connected to WordPress.com

Cookie Name Duration Purpose
tk_ai session Stores a randomly-generated anonymous ID. This is only used within the admin area and is used for general analytics tracking.

Other cookies

Some Jetpack features make use of third-party applications and services to enhance the experience of visitors. These include social media platforms, such as Facebook and Twitter (via our Sharing feature). As a result, cookies may be set by these third parties, and used by them to track your online activity. We have no direct control over or access to the information that is collected by these cookies. We recommend consulting the individual privacy policies of any such services for more information.

Site owners may also be using different plugins or other third-party services that set and use cookies. If you are a site owner, you may wish to make your visitors aware of such tracking using our EU Cookie Law Widget. If you are a site visitor, you may need to consult the site owner regarding these types of cookies.

Managing your site on WordPress.com will result in additional cookies being set.

Controlling cookies

Visitors may wish to restrict the use of cookies, or completely prevent them from being set. Most browsers provide for ways to control cookie behavior, such as the length of time they are stored — either through built-in functionality or by utilizing third-party plugins.

To find out more about how to manage and delete cookies, visit aboutcookies.org. For more details about advertising cookies, and how to manage them, visit youronlinechoices.eu (EU based), or aboutads.info (US based).

It’s important to note that restricting or disabling the use of cookies can limit the functionality of sites, or prevent them from working correctly.