Kwai Pixel

What Kwai Pixel is

Kwai Pixel is the conversion tracking and audience building tag of Kwai for Business, the advertising arm of Kuaishou Technology, the Chinese operator of the Kwai short video app. Advertisers install a JavaScript snippet on their site to forward visitor events such as page views, add to cart, lead and purchase to the Kwai for Business platform, in order to measure ad effectiveness, build custom audiences and look alike segments and optimise bidding within the Kwai ad ecosystem.

Data and cookies collected

Once consent is granted and the snippet loads, Kwai Pixel reads or sets a first party cookie containing a pseudonymous user identifier and a session identifier, plus a third party cookie used for cross site retargeting. It then collects the IP address, the user agent, the referrer, the page URL, the page title, the time stamp, the click identifier (kclid) and the event name and parameters configured by the advertiser, including hashed email or phone if the advertiser uses Advanced Matching.

GDPR and ePrivacy implications

Kwai Pixel writes and reads identifiers on the user device, which falls within Article 5(3) of the ePrivacy Directive. Prior, free, specific, informed and unambiguous consent is required before the snippet loads. The downstream processing of personal data also requires a GDPR legal basis, namely consent under Article 6(1)(a). Operators must analyse joint controllership with Kwai for the audience and conversion data they upload, and reflect the analysis in the Data Processing Agreement and privacy notice.

International data transfers

Data is transferred to Kuaishou Technology servers located in China and Singapore. Neither jurisdiction benefits from an adequacy decision from the European Commission. The transfer must rely on Standard Contractual Clauses and on a Transfer Impact Assessment that addresses, in particular, the Chinese National Intelligence Law and Cybersecurity Law, which can compel disclosure to public authorities. Supplementary measures such as encryption in transit, contractual restrictions on disclosure and minimisation of personal data should be documented.

Consent management and practical steps

Block the Kwai Pixel until consent is granted, integrate it with your CMP, document the pixel in your record of processing activities, in the privacy notice and in the cookie banner. Sign a Data Processing Agreement with Kuaishou Technology. If you use the Conversions API, hash personal identifiers before transmission and apply server side filtering. Define a retention period aligned with the advertising purpose and a process for forwarding data subject requests to Kwai.

Privacy friendly alternatives

If consent rates are too low or risk appetite too limited, alternatives include EU based analytics platforms with consent free modes, server side conversion APIs combined with first party data and contextual advertising on European media. Brands targeting Chinese users can also evaluate aggregated reporting that does not transmit individual identifiers.