What is the cookie size limitation for IE9 and IE 10?

Question

I know that for IE 8 following RFC 2109 it is 4kb. Is it the same for IE 9 and IE 10?

Answer 1

Related questions:

• What are the current cookie limits in modern browsers?
• What is the number and size of cookies allowed by major browsers?

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IE10

Max size per cookie: 5117 chars

Max size per domain: 10234 chars

IE 9

(info missing)

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According to this site (http://browsercookielimits.iain.guru/) (mirror here) IE8, 9 and 10 behave in the very same way.

In the doubt that this may be outdated, I ran the test with my version of IE (10.0.9200.16580) and got pretty consistent results:

17:34:29.657: Starting
17:34:29.706: Max Cookies with Character Length 3 and character "1": 50
17:34:30.776: Max Cookie Character Length using character "1": 5117
17:34:30.854: Max Cookies with Character Length 5117 and character "1": 2
17:34:31.911: Max Cookie Character Length using character "ÿ": 5117
17:34:31.985: Max Cookies with Character Length 5117 and character "ÿ": 2
17:34:32.66: Max Cookies with Character Length 100 and character "1": 50
17:34:32.148: Max Cookies with Character Length 10 and character "1": 50
17:34:32.228: Max Cookies with Character Length 5 and character "1": 50
17:34:32.273: Guessing Max Cookie Count Per Domain: 50
17:34:32.279: Guessing Max Cookie Size Per Cookie: 5117 characters
17:34:32.284: Guessing Max Cookie Size Per Domain: Between 10234 and 15350 characters
17:34:43.479: Starting to get Accurate Max Size Per Domain, may take awhile
17:34:45.539: Max Cookies Size Per Domain: 10234
17:34:45.579: Guessing Max Cookie Size Per Domain: 10234 characters

Sources:

• http://www.jstorage.info/
• http://browsercookielimits.iain.guru/
• http://www.ghacks.net/2008/08/16/browser-cookie-limits/ (no info for IE though)
• http://www.nczonline.net/blog/2008/05/17/browser-cookie-restrictions/