HTML URL-Uniform Resource Locators

A URL is a web page address.

A URL can be made up of letters, such as “it-res.com”, or an Internet Protocol (IP) address: 1.1.1.1. Most people access a website using its domain name because names are easier to remember than numbers.

URL – Uniform Resource Locator

A web browser requests a page from a web server via a URL.

When you click a link in an HTML page, the corresponding <a> tag points to an address on the World Wide Web.

A Uniform Resource Locator (URL) is used to locate a document on the World Wide Web.

An example of a web page address: https://www.it-res.com/en/html-paragraph.html Syntax rules:

scheme : //host.domain : port / path / filename

illustrate:

• scheme – defines the type of Internet service. The most common type is http
• host – defines the domain host (the default host for http is www)
• domain – defines the Internet domain name, such as www.it-res.com
• :port – defines the port number on the host (the default port number for http is 80)
• path – defines the path on the server (if omitted, the document must be in the root directory of the website).
• filename – defines the name of the document/resource

Common URL Schemes

Here are some URL schemes:

URL character encoding

URLs can only use the ASCII character set .

Because URLs often contain characters outside the ASCII set, URLs must be converted to valid ASCII format.

URL encoding uses “%” followed by two hexadecimal digits to replace non-ASCII characters.

URLs cannot contain spaces. URL encoding typically uses + to replace spaces.

Online Instance

If you click the “Submit” button below, the browser will URL-encode the input before sending it. The page on the server will display the input received.

Try entering some characters and clicking the Submit button again.

URL Encoding Example