Some examples of reserved characters are ?, /, #, : etc. These characters are called reserved characters. Moreover, there are some characters that have special meaning within URLs. backspace, vertical tab, horizontal tab, line feed etc), unsafe characters like space, \,, etc, and any character outside the ASCII charset is not allowed to be placed directly within URLs. These characters include digits (0-9), letters(A-Z, a-z), and a few special characters ( "-", ".", "_", "~").ĪSCII control characters (e.g. URL Encoding (Percent Encoding)Ī URL is composed from a limited set of characters belonging to the US-ASCII character set. This post contains information from the latest RFC document. ![]() ![]() The current RFC that defines the Generic URI syntax is RFC 3986. There have been many improvements done to the initial RFC defining the syntax of Uniform Resource Locators (URLs).
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