Third-party cookies
Understand cookie usage on your site, and learn how to transition to alternatives.
Prepare for third-party cookie restrictions
Provide a great experience for your users, whether or not third-party cookies are available.
Audit your use of cookies
Review your cookies and make a list of those cookies for which you will need to take action to ensure they keep functioning properly.
Test for breakage
Set up Chrome to simulate the state when third-party cookies are blocked by user choice.
CHIPS
The new cookie attribute, Partitioned, allows developers to opt a cookie into partitioned storage, with separate cookie jars per top-level site.
Storage Access API
Storage Access API allows iframes to request storage access permissions when access would otherwise be denied by browser settings.
Related Website Sets
Related Website Sets (RWS) is a way for a company to declare relationships among sites, so that browsers allow limited third-party cookie access for specific purposes.
Federated Credential Management API
A web API for privacy-preserving identity federation.
What are cookies?
Understand HTTP cookies: how they're set by a web server, then stored and sent by a web browser.
What are third-party cookies?
A third-party cookie is from a site that's different from the site you're visiting. What does that mean in practice?
Cookie attributes
Cookies can include attributes to control if they're set, and when they expire.
HTTP request and response
The web uses the HTTP protocol to transfer resources and set cookies. How does that work?
Cookie blocking
Cookies can be blocked by browser design, Enterprise policy, or user choice. This article explains how.
Cookie tools
Chrome tools to help you understand cookie usage on your site.
Cookie demos
Demos of first-party cookies, third-party cookies, and cross-site tracking.
Identity guide
Find recommended solutions for sign-in scenarios.
Embed guide
Test for embed-related journeys that rely on third-party cookies, and learn how to choose between the privacy-preserving alternatives.
Grace period
Chrome's third-party cookie grace period provides a way for sites and services experiencing breakage to request additional time to move away from third-party cookies to alternative solutions.
Grace period opt out
Chrome is providing a mechanism to allow sites to opt out of the third-party cookie grace period for a percentage of users.
Heuristics-based exceptions
Learn more about temporary heuristics-based exceptions.
Enterprise support
Learn more about Chrome Enterprise policies for third-party cookies.
Third-party cookie site compatibility lookup tool
Chrome is providing a lookup service to show how third-party cookie availability is affected by Chrome's third-party cookie grace period, and grace period opt-out configuration.
An opt-out mechanism for the third-party cookie grace period
When a breakage report is filed at goo.gle/report-3pc-broken and meets all eligibility criteria, Chrome initiates a grace period that provides continued access to third-party cookies for a limited time. Chrome is now providing a mechanism to allow sites to opt out of the grace period for a percentage of users.
Privacy Sandbox at Mercado Libre
Learn how Latin America's leading ecommerce platform Mercado Libre made their journey to reduce reliance on third-party cookies and protect the privacy of their customers.
Report issues with third-party cookies and get help
We want to ensure we capture the various scenarios where sites break without third-party cookies to ensure that we have provided guidance, tooling, and functionality to allow sites to migrate away from their third-party cookie dependencies. If your site or a service you depend on is breaking with third-party cookies disabled, you can submit it to our breakage tracker.