URLkoodattuja

URLkoodattuja, often referred to as URL encoding or percent-encoding, is a mechanism for converting certain characters into a format that can be reliably transmitted over the internet within a Uniform Resource Locator (URL). URLs have a restricted set of allowed characters, and any data that falls outside this set, such as spaces, special symbols, or non-ASCII characters, must be encoded.

The process involves replacing these disallowed characters with a '%' symbol followed by their two-digit hexadecimal representation. For instance, a space character, which is not permitted in many parts of a URL, is typically encoded as %20. Similarly, characters like '&' become %26 and '#' becomes %23. This ensures that the URL remains valid and can be correctly interpreted by web servers and browsers.

URLkoodattuja is essential for the proper functioning of the web. Without it, data containing special characters would break URLs, leading to errors and an inability to access web resources. It's a fundamental part of how data is passed between clients and servers, particularly in query strings and path segments of URLs. The encoding scheme is defined by RFC 3986.