Cookie maximum size
The maximum size of a cookie that can be set in a web browser depends on the browser and the specific implementation of the HTTP protocol it uses.
According to the HTTP state management mechanism specification (RFC 6265), a cookie can have a maximum size of 4 kilobytes (KB). This includes both the name and the value of the cookie, as well as any associated metadata such as the expiration date, domain, and path.
However, some browsers may enforce additional limits on the size of cookies they accept. For example, Internet Explorer limits the maximum cookie size to 4096 bytes, while Firefox allows cookies up to 4097 bytes in size.
It's also worth noting that setting very large cookies can negatively impact website performance, as the browser has to send the cookie back to the server with every subsequent request. It's generally recommended to keep cookie sizes as small as possible to minimize their impact on page load times and network performance.