'Maximum Cookie Size of current browsers (Year 2018)

From the django docs:

Both RFC 2109 and RFC 6265 state that user agents should support cookies of at least 4096 bytes. For many browsers this is also the maximum size.

Source: https://docs.djangoproject.com/en/2.1/ref/request-response/

Is this still valid today?

What is the maximum cookie size of current browsers?

Solution 1:^[1]

The cookie spec definition in RFC6265 (April 2011) is the current RFC (No new draft and no new RFC) and is supported by all major browsers (IE,Chrome,Opera,Firefox) today.

At least 4096 bytes for the entire cookie (as measured by the sum of all of the cookie names, values, and attributes).
At least 50 cookies per domain, provided they don't go over the above limit.
At least 3000 cookies total.

So all modern browsers support AT LEAST this. Any other limit values are a gamble

See 6.1. Limits in https://datatracker.ietf.org/doc/rfc6265/ for more details

Solution 2:^[2]

You can test it out by setting and reading back a cookie size from JavaScript in an iteration if you are interested in modern browsers only.

That is what I was doing in the past. And this is exactly what this site is about, it also includes the limits by browsers.

But keep in mind that the matching cookies will travel with every HTTP requests so they could dramatically affect the perceived response time.

Solution 3:^[3]

here is the detail which you can refer - http://browsercookielimits.iain.guru/

Typically, the following are allowed: 300 cookies in total 4096 bytes per cookie 20 cookies per domain 81920 bytes per domain*

Given 20 cookies of max size 4096 = 81920 bytes.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Andy Ray
Solution 2
Solution 3	Iain

'Maximum Cookie Size of current browsers (Year 2018)

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Sources

Related Questions

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