Maximum HTTP URL length

The HTTP RFC2616 protocol does not specify the maximum length of the URL, but requires the server to return a 414 status code (Request-uri Too long) If it cannot process a URL that is too long.

The HTTP RFC2616 protocol states that some old clients or proxies may not be able to handle URIs with more than 255 bytes.

Since the HTTP protocol does not specify the maximum length of the URL, the maximum length of the URL is related to the user's browser, as well as the maximum length URL that the server can handle.

Site Map Protocol (sitemap Protocol), limit the length of the URL is 2048, if you want to allow search engines to search you, 2048 is the maximum limit.

Google can crawl and index 2047 bytes of the URL, but the user clicks will return 414, after testing, Google's SERP connection, the maximum can not exceed 1855 characters, more than this number, the user clicks return 414.

The maximum URL length for a IE8 URL is 2,083 bytes, where the path portion (path) has a maximum length of 2048 bytes. IE9 also has a similar limit, and IE10 accepts only 2,083 bytes. Although clicking on the URL is longer than the length of the connection, the Address bar displays only the first 2,083 bytes.

A netizen tested the maximum URL length supported by a browser and server, as shown in the following table:

Ie	The maximum URL limit is 2,083 bytes, and the path length is 2048 bytes (GET request).
Firefox	65536
Safari	More than 80000
Opera	More than 190000 bytes
Chrome	8182 bytes
Apache Server	8192 bytes
Iis	16384 bytes
Perl HTTP::D Aemon	At least 8000 bytes

Here's an interesting test:

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