React Query for API Management
Master React Query for handling API requests, URL encoding, data fetching, and query parameter management in modern React applications.
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Open tool →URL encoding, also known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI) under certain circumstances. Although it is known as URL encoding, it is also used more generally within the main Uniform Resource Identifier (URI) set, which includes both Uniform Resource Locator (URL) and Uniform Resource Name (URN).
URL encoding converts characters into a format that can be transmitted over the Internet. URLs can only be sent over the Internet using the ASCII character set. Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format.
URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits. URLs cannot contain spaces. URL encoding normally replaces a space with a plus (+) sign or with %20.
URL encoding is necessary in the following situations:
URL encoding follows the RFC 3986 standard, which defines the syntax of Uniform Resource Identifiers (URIs). According to this standard, the following characters are reserved and must be percent-encoded when they are used in a URI:
! * ' ( ) ; : @ & = + $ , / ? # [ ]Here are some examples of URL encoding:
| Character | URL Encoded |
|---|---|
| Space | %20 |
| ! | %21 |
| # | %23 |
| $ | %24 |
| % | %25 |
| & | %26 |
| ' | %27 |
| ( | %28 |
| ) | %29 |
URL encoding and HTML encoding (also known as HTML entity encoding) are two different encoding schemes used for different purposes:
URL encoding is a mechanism for translating special characters and non-ASCII characters into a format that can be transmitted over the Internet. It replaces unsafe characters with a "%" followed by two hexadecimal digits.
You should use URL encoding when you need to include special characters in a URL, such as spaces, ampersands, or non-ASCII characters. This ensures that the URL is properly formatted and can be correctly interpreted by web browsers and servers.
Most programming languages provide built-in functions for URL encoding and decoding. Here are some examples:
encodeURIComponent() and decodeURIComponent()urllib.parse.quote() and urllib.parse.unquote()urlencode() and urldecode()URLEncoder.encode() and URLDecoder.decode()For comprehensive web development best practices and API handling techniques, check our guide on React Query for API management or explore our API Request Builder for testing URL-encoded requests.
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