URL ○꠹｜Definition｜1st｜20260708153444-00-⌔

URL - Wikipedia

URL

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A uniform resource locator (URL), colloquially known as a web address,¹ is a reference to a resource on the World Wide Web. A URL specifies the location of a resource on a computer network and a mechanism for retrieving it. A URL is a specific type of Uniform Resource Identifier (URI),²[^1] although many people use the two terms interchangeably.³⁴ A URL is most commonly used to reference a web page (HTTP/HTTPS) but is also used for file transfer (FTP), email (mailto), database access (JDBC), and many other applications.

Most web browsers display the URL of a web page above the page in an address bar. As an example of a web page URL, https://www.example.com/index.html indicates protocol https, hostname www.example.com, and file name index.html.

Printed 2026-07-08.

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Footnotes

1. W3C (2009). ↩

2. “Forward and Backslashes in URLs”. zzz.buzz. Archived from the original on 2018-09-04. Retrieved 2018-09-19. ↩

3. Mealling, Michael H.; Denenberg, Ray (August 2002). Report from the Joint W3C/IETF URI Planning Interest Group: Uniform Resource Identifiers (URIs), URLs, and Uniform Resource Names (URNs): Clarifications and Recommendations. Network Working Group. doi:10.17487/RFC3305. RFC 3305. Informational. ↩

4. A URL implies the means to access an indicated resource and is denoted by a protocol or an access mechanism, which is not true of every URI.^{[1]}$$^{[8]} Thus http://www.example.com is a URL, while www.example.com is not.${}^{[9]}$ ↩