Piwik PRO sets first-party cookies in the visitor’s browser (except the deprecated stg_global_opt_out third-party cookie). Cookies are used to collect and store data about a visitor, their sessions and interactions with your site. Each module in Piwik PRO uses different kinds of cookies. Here’s a list of all cookies used by Piwik PRO.
Analytics
_pk_ses.<websiteID>.<domainHash>
Module: Analytics
Expires after: 30 minutes (can be changed)
Extends: Automatically
Type: First-party cookie
About: Shows an active session of the visitor. If the cookie isn’t present, the session has finished over 30 minutes ago and it was counted in a pk_id cookie.
_pk_id.<websiteID>.<domainHash>
Module: Analytics
Expires after: 13 months (can be changed)
Extends: No
Type: First-party cookie
About: Used to recognize visitors and hold their various properties.
Value: <visitorID>.<cookieCreationTimestamp>.<visitsCount>.<currentVisitTimestamp>.<lastVisitTimestamp>.<lastEcommerceOrderTimestamp>
- visitorID: Value is generated via JavaScript when not provided otherwise.
- cookieCreationTimestamp: Cookie creation time.
- visitsCount: 0 means there are no previous visits.
- currentVisitTimestamp: Current time. Refreshed with every user action.
- lastVisitTimestamp: Time of a last visit. Empty if there are no previous visits. It is also used to increase the number of visits (together with the cookie pk_ses).
- lastEcommerceOrderTimestamp: Time of a last ecommerce order. Empty if there are no ecommerce orders.
_pk_cvar
Module: Analytics
Expires after: 30 minutes (can be changed)
Extends: No
Type: First-party cookie
About: Holds custom variables that were set during previous page view. It’s not enabled by default. Requires calling the storeCustomVariablesInCookie() method on the Javascript tracker object.
Value: Custom variable keys and values.
piwik_auth
Module: Analytics
Expires after: 24 minutes (can be changed)
Extends: Automatically
Type: First-party cookie
About: Stores session information for Piwik PRO’s user interface (UI). As long as this cookie is valid and contains a login and a token_auth parameter, a visitor is considered as a logged-in visitor, and a PIWIK_SESSID cookie will be refreshed.
Value: login=<userLogin>:token_auth=<tokenHash>:_=<signature>
- userLogin: User’s login.
- tokenHash: md5 hash created from a login and a token_auth parameter.
- signature: Checksum
PIWIK_SESSID
Module: Analytics
Expires after: 24 minutes (can be changed)
Extends: No
Type: First-party cookie
About: Stores a PHP session ID.
Value: A unique session identifier.
Consent Manager
ppms_privacy_
Module: Consent Manager
Expires after: 365 days (can be changed), 30 minutes (for anonymous tracking)
Extends: Automatically
Type: First-party cookie
About: Stores visitor`s consent to data collection and usage.
Value: A JSON encoded object that holds visitor`s consent to data collection and usage.
- -1: A visitor didn’t make any decision.
- 0: A visitor didn’t agree to the use their data.
- 1: A visitor agreed to the use of their data.
Created if: You use Consent Manager and display the form on your site.
Decoded cookie:
{
"consents":{
"analytics":{
"status":-1,
"historyId":"8438dc88-b4ac-40a2-8f4d-4aa2b756f66b",
"updatedAt":"2020-01-30T12:15:47.283Z" },
"ab_testing_and_personalization":{
"status":1,
"historyId":"5233e88f-6e5a-4cac-893f-d9ffa410cb73",
"updatedAt":"2020-01-31T10:56:35.447Z" },
"custom_consent":{
"status":0,
"historyId":"be4f1bbb-4ba7-4954-8c64-dc0333ab589a",
"updatedAt":"2020-01-31T10:56:35.447Z" },
"user_feedback":{
"status":0,
"historyId":"d2b5f73b-9cbe-4ed6-aee0-88644c62be6a",
"updatedAt":"2020-01-31T10:56:35.447Z" },
"marketing_automation":{
"status":0,
"historyId":"ce1dc131-22e7-4f0a-aafd-83bc0b1cff73",
"updatedAt":"2020-01-31T10:56:35.447Z" },
"remarketing":{
"status":1,
"historyId":"210ec16b-22ae-446a-9799-57069167c08e",
"updatedAt":"2020-01-31T10:56:35.447Z" },
"conversion_tracking":{
"status":0,
"historyId":"c4e868e6-058f-44b6-84a7-7c0d08aa0124",
"updatedAt":"2020-01-31T10:56:35.447Z" }, "intro":{
"historyId":"6c69aa2a-443f-41a1-ada2-75dd394fc782",
"updatedAt":"2020-01-31T10:56:35.447Z" } },
"visitorId":"564e3818-27e7-e38f-39dd-569067520af2",
"domain":{
"normalized":"client1.piwikpro.test",
"isWildcard":false, "pattern":"client1.piwikpro.test" },
"staleCheckpoint":"2020-01-31T10:56:27.699Z" } Tag Manager
_stg_debug / stg_debug
Module: Tag Manager
Expires after: 14 days
Extends: Automatically
Type: First-party cookie
About: Determines if the Tag Manager’s debugger should be displayed. A cookie is removed after you close the debugger.
Value: 1 when debug mode is turned on.
Created if: You use a stg_debug query parameter in the URL.
stg_traffic_source_priority
Module: Tag Manager
Expires after: 30 minutes
Extends: Automatically
Type: First-party cookie
About: Stores the type of traffic source that explains how the visitor reached your website.
Value:
- 1: Direct
- 2: Referral
- 3: Social media
- 4: Organic search
- 5: Campaign
Created if: You use the traffic source condition in a trigger.
stg_last_interaction
Module: Tag Manager
Expires after: 365 days
Extends: Automatically
Type: First-party cookie
About: Determines whether the last visitor’s session is still in progress or a new session has started.
Value: A timestamp of the last interaction a visitor had on your website.
Created if: You use a multiplicity condition in a trigger.
stg_returning_visitor
Module: Tag Manager
Expires after: 365 days
Extends: Automatically
Type: First-party cookie
About: Determines if the visitor has already been to your website — they are returning visitors.
Value: A timestamp of the last interaction a visitor had on your website.
Created if: You use a returning-visitor condition in a trigger.
stg_fired__
Module: Tag Manager
Expires after: The session ends. (Fixed idle time or after a browser is closed.)
Extends: No
Type: First-party cookie
About: Determines if the combination of a tag and trigger was fired during the current visitor’s session.
Value: A timestamp of the moment when a tag is fired.
Created if: You use a multiplicity condition in a trigger, and a trigger is set to fire a tag once per session. A cookie is created after the tag was fired.
stg_utm_campaign
Module: Tag Manager
Expires after: The session ends. (Fixed idle time or after a browser is closed.)
Extends: No
Type: First-party cookie
About: Stores a name of the campaign that directed the visitor to your website.
Value: An encoded value of an utm_campaign query parameter.
Created if: You use the campaign condition in a trigger, and a visitor enters your website from a campaign with an utm_campaign query parameter.
stg_pk_campaign
Module: Tag Manager
Expires after: The session ends. (Fixed idle time or after a browser is closed.)
Extends: No
Type: First-party cookie
About: Stores a name of the campaign that directed the visitor to your website.
Value: An encoded value of a pk_campaign query parameter.
Created if: You use the campaign condition in a trigger, and a visitor enters your website from a campaign with a pk_campaign query parameter.
stg_externalReferrer
Module: Tag Manager
Expires after: The session ends. (Fixed idle time or after a browser is closed.)
Extends: No
Type: First-party cookie
About: Stores an URL of a website that referred a visitor to your website.
Value: The window.location.origin value for a referral website.
Created if: You use the external referrer condition in a trigger, and a visitor enters your website from a referral website.
_stg_opt_out_simulate
Module: Tag Manager
Expires after: 365 days
Extends: Automatically
Type: First-party cookie
About: Used to simulate the behavior of the opt-out snippet in the debugger. It turns off all tracking tags in the tested domain.
Value:
- true: Opt-out simulation is turned on.
- false: Opt-out simulation is turned off.
Created if: You turn on opt-out simulation in debug mode.
_stg_optout
Module: Tag Manager
Expires after: 365 days
Extends: Automatically
Type: First-party cookie
About: Used to turn off all tracking tags in the tested domain.
Value:
- true: A visitor opts out of tracking.
- false: A visitor agrees to tracking.
Created if: A visitor opts out of tracking. (You use an opt-out snippet.)
stg_global_opt_out (deprecated)
Module: Tag Manager
Expires after: 365 days
Extends: Automatically
Type: Third-party cookie
About: Used to turn off all tracking tags on websites that belong to one Piwik PRO account.
Value:
- 1: A visitor opts out of tracking.
- 0: A visitor agrees to tracking.
Created if: A third-party cookie is set when a visitor opts out of tracking. (You use a global opt-out snippet.)
Personalization
Note: This module worked for versions below 10.1.0. The latter versions don’t use these cookies.
stg_popup
Module: Personalization (versions below 10.1.0)
Expires after: 365 days
Extends: No
Type: First-party cookie
About: Stores information about the pop-up version that was shown to the visitor.
Value: A stringified object with a website ID, pop-up ID, and variant ID. { <website_id>: { <popup_id>: <version_id> } }
Created if: You display a popup on your site.
stg_content
Module: Personalization (versions below 10.1.0)
Expires after: 365 days
Extends: No
Type: First-party cookie
About: Stores information about the content version that was shown to the visitor.
Value: A stringified object with a website ID, content ID, and variant ID. { <website_id>: { <content_id>: <version_id> } }
Created if: You serve the content on your site.
Local storage
In addition to cookies, Piwik PRO uses local storage in the visitor’s browser to stack some information. Here’s what is kept in that storage.
ppms_webstorage
Module: Tag Manager, Consent Manager and Analytics
About: Prevents visitor’s data loss that may happen because of some mechanisms used by browsers, for example, Safari’s ITP.
Value: A stringified object that contains information about created cookies for each module. It stores data about each created cookie such as a key, value, expiry date, path, domain, and more. This is the same data that was used to create a cookie.
Created if: Each tine a cookie is set in the visitor’s browser.
Removed if: A ppms_webstorage item isn’t removed automatically. But a visitor can delete it manually. Single entries in the object are removed after a corresponding cookie expires.
ppms_data_store
Module: Audience Manager
About: Stores information from forms on your website. After a visitor submits a form, the data is passed to Audience Manager. But if a form redirects a visitor to another page, data may be lost. Therefore form data is kept in the local storage as a backup. (A page where a visitor is redirected needs to have a form tracker, otherwise Piwik PRO can’t collect form data.)
Value: A JSON encoded object that contains:
- payload: AES encrypted form data.
- aes: RSA encrypted AES key (for payload)
- Iv: initialization vector (for payload)
Removed if: After the form tracker sends data to the server. It can happen right after a visitor submits a form or after a new page loads in his or her browser.