In URL encoding, reserved characters that have special meanings and unsafe characters might be altered during transmission or have special meanings in certain contexts in URLs are typically encoded using a percent sign (’%’) followed by two hexadecimal digits representing the ASCII value of the character. For example:

• The ASCII value of ‘/’ is 47 in decimal.
• 47 in hexadecimal is 2F. ⠀Thus, ‘/’ becomes ‘%2F’ when it is URL-encoded. This encoding is often necessary to ensure that URLs are transmitted correctly over the Internet, where certain characters might otherwise be misinterpreted. Any characters outside the ASCII range (0-127) should also be encoded, as they might not be correctly interpreted by all systems. These are typically encoded using UTF-8 and then percent-encoded. Path and Query Parameters usually need to be url-encoded.