What is id5-sync.com?
id5-sync.com is ID5, a London company that provides a shared advertising ID meant to replace third-party cookies.
Data brokerOwned by ID5, based in London.
What it does on a page
It creates an ID for your browser that many ad companies can use, sometimes based on a hashed email address you’ve given the site.
Should you block it?
Blocking it doesn’t break sites.
Also seen as
ID5 · id5-sync.com/i
In the Browser Monster Index
39
checked websites loaded ID5.
On 4 it loaded before visitors made any choice, and on 2 it was still seen after we clicked reject.
See when ID5 is watching you
Browser Monster shows every tracker on the pages you visit, who owns it and where it sends your data, all worked out on your device.