What is a Third-Party Cookie?

A third-party cookie is a type of tracking cookie used in web browsers to collect data about a user's browsing behavior across multiple websites that belong to different domains. Cookies are small pieces of data that websites store on a user's device, typically in the form of text files, to remember certain information or track user interactions.


There are two types of cookies:

Third-party cookies

These are set by domains other than the one the user is currently visiting. They are often used by advertisers and analytics companies to track users across multiple websites, allowing them to gather information about a user's interests and online behavior. For example, if you visit Website A and it contains content (like ads) from Advertiser B's domain, Advertiser B can use third-party cookies to track your activity on both Website A and other websites that also display their content.

First-party cookies

These are created by the website that the user is currently visiting. They are primarily used to store user-specific information like login credentials, shopping cart contents, and user preferences for that particular website.

The use of third-party cookies has raised privacy concerns, as they can potentially lead to user data being shared across various companies without users' explicit consent.

Due to these concerns, there has been increased regulatory attention and changes in browser policies. For instance, as of my last knowledge update in September 2021, major web browsers like Chrome, Firefox, and Safari have been implementing measures to restrict or block third-party cookies for better user privacy.

Your Cookies are going extinct

Browsers are phasing out all third-party cookies.

By the end of 2024 the EU expects them to be gone, so it is time to act now.

Your returning visitors will show up as new visitors, making advertising expensive.

MarvelPixel solves this with one line of code.

Core focus of MarvelPixel

Enhanced Marketing Performance

Robust Analytics & Reporting

Retargeting & Lookalike Audiences

Sign up for the


Due to high demand, we are slowly on-boarding new clients Please fill in your information.

Besides ultimetly receiving your access codes you will also be kept up to date with any advancements or news.

Your name*
Open message
Please fill all the required fields!
Please accept terms and conditions to proceed

For other business inquiries contact us at:


Copyright © 2024 Marveltest B.V. All rights reserved.

What are Third-party cookies??

Third-party cookies are most frequently used for online advertising. These cookies track a user's browsing history and activities so they can present them with personalized ads for products and services

Browsers are phasing out all third-party cookies.

By the end of 2024 the EU expects them to be gone, so it is time to act now.

Please wait