URL vs. URI: Know the Difference
By Hifza Nasir & Dua Fatima || Published on October 21, 2025
A URL specifies the location of a resource on the internet, including access method, while a URI identifies a resource either by location or a name.
Key Differences
A URL (Uniform Resource Locator) is a specific type of URI (Uniform Resource Identifier) that not only identifies a resource on the internet but also provides a method for accessing it, typically including a protocol (like HTTP or FTP), domain name, and path to the resource. In contrast, a URI is a broader concept that can refer to a resource either by its location (URL) or a name (URN), serving as a generic term for all types of identifiers.
Dua Fatima
Oct 21, 2025
URL is a URI, not every URI is a URL. For example, a URN (Uniform Resource Name) is a type of URI that names a resource without describing its location or how to access it. This distinction highlights the broader applicability of URIs, which can encompass both the specific locations of resources and the names or identifiers that are not tied to a specific access method or location.
Hifza Nasir
Oct 21, 2025
The syntax of a URL is structured to include the access mechanism (protocol), the domain, and the path to the resource, making it easy to locate and retrieve the resource. A URI, given its broader definition, may not always follow this structure, especially when it functions as a URN, focusing instead on the uniqueness of the identifier within a given namespace.
Hifza Nasir
Oct 21, 2025
URLs are what people commonly use to navigate the web, as they provide direct instructions on where and how to retrieve a resource. URIs, while encompassing URLs, also allow for the identification of resources in contexts where the direct retrieval method is unnecessary or unavailable.
Shumaila Saeed
Oct 21, 2025
The use of URIs is fundamental in web technologies and standards, such as XML namespaces and RDF resources, where identifiers may not necessarily be linked to directly retrievable resources. This distinction emphasizes the role of URIs in semantic web applications, where the identification of concepts and relationships is as important as the retrieval of web pages or documents.
Dua Fatima
Oct 21, 2025
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Comparison Chart
Definition
Specifies how to access a resource on the internet.
Identifies a resource either by location (URL) or name (URN).
Dua Fatima
Oct 21, 2025
Includes
Access protocol, domain name, path.
May only include a name or identifier without access instructions.
Hifza Nasir
Oct 21, 2025
Usage
Navigating to web resources.
Identifying resources, including those not retrievable via HTTP.
Shumaila Saeed
Oct 21, 2025
Specificity
Always includes location and access method.
Can be abstract, not specifying location or access method.
Shumaila Saeed
Oct 21, 2025
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URL and URI Definitions
URL
Includes protocol, domain, and path.
Secure websites use the HTTPS protocol, as in https://secure.example.com.
Dua Fatima
Feb 29, 2024
URI
Supports identification beyond the web.
URIs can identify concepts and entities in RDF data.
Dua Fatima
Feb 29, 2024
URL
Directs to the location of a web resource.
Visit our website at http://www.example.com for more information.
Hifza Nasir
Feb 29, 2024
URL
Used in web browsers to retrieve content.
You can access the article by entering its URL into your browser.
Shumaila Saeed
Feb 29, 2024
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URI
Used in software and web development.
API endpoints are identified by URIs for resource access.
Dua Fatima
Feb 29, 2024
URL
Specific to resource location.
The URL http://www.example.com/index.html points directly to the homepage.
Dua Fatima
Feb 29, 2024
URI
Identifies web or other resources.
XML namespaces are defined using URIs to ensure uniqueness.
Dua Fatima
Feb 29, 2024
URL
Essential for web navigation.
Bookmarking a URL allows you to quickly return to a webpage.
Hifza Nasir
Feb 29, 2024
URI
Can be a URL or a URN.
A book's ISBN can be represented as a URN, such as urn:isbn:0451450523.
Hifza Nasir
Feb 29, 2024
URL
An internet address (for example, http://www.hmhco.com/about-hmh), usually consisting of the access protocol (http), the domain name (hmhco.com), and optionally the path to a file or resource residing on the server where the domain name resides (about-hmh).
Hifza Nasir
Feb 29, 2024
Repeatedly Asked Queries
What is the purpose of a URN?
URNs uniquely name a resource without implying its location or how to access it, useful for resources that may move or change location.
Hifza Nasir
Oct 21, 2025
How do I know if a string is a URL or URI?
If it specifies a protocol and location for accessing a resource, it’s a URL (and also a URI); if it doesn’t, but still identifies a resource, it’s a URI that may not be a URL.
Dua Fatima
Oct 21, 2025
How are URIs used in semantic web?
URIs identify entities and relationships in semantic web technologies, enabling structured data to be linked and queried across the internet.
Hifza Nasir
Oct 21, 2025
Why is every URL considered a URI?
Because a URL is a specific instance of a URI that includes a mechanism for accessing the resource, making it a subset of URIs.
Dua Fatima
Oct 21, 2025
Is an email address a URL or URI?
An email address is considered a URI because it identifies a resource (an email account) but does not specify how to access it via the HTTP protocol.
Hifza Nasir
Oct 21, 2025
Can URIs change over time?
While URIs are meant to be stable identifiers, the resources they identify can change or be moved, especially in the case of URLs.
Hifza Nasir
Oct 21, 2025
What ensures the uniqueness of a URI?
Standardization bodies and naming conventions ensure that URIs are unique and consistent across different systems.
Dua Fatima
Oct 21, 2025
Can a URI be used to access a web page?
If the URI is a URL, yes, because it specifies the location and method for accessing a web page.
Hifza Nasir
Oct 21, 2025
What role do URIs play in XML namespaces?
URIs uniquely identify XML namespaces, preventing name conflicts in XML documents by distinguishing between elements that may have the same name but different meanings.
Shumaila Saeed
Oct 21, 2025
Is it possible for a URI to become invalid?
While URIs themselves remain valid identifiers, the resource they point to may become unavailable or move, particularly in the case of URLs.
Dua Fatima
Oct 21, 2025
Are all web addresses URLs?
Yes, web addresses used to access sites or resources on the internet are URLs because they provide the location and method for retrieval.
Dua Fatima
Oct 21, 2025
Can a resource have both a URL and a URN?
Yes, a resource can be identified by a URN for stable, long-term identification and a URL for current access methods.
Hifza Nasir
Oct 21, 2025
Why are URIs important in web development?
URIs are essential for identifying resources, defining access endpoints, and ensuring the interoperability of web standards and protocols.
Hifza Nasir
Oct 21, 2025
How do developers use URIs in applications?
Developers use URIs to specify endpoints for web services, identify resources within applications, and reference external resources.
Hifza Nasir
Oct 21, 2025
How does a URN differ from a URL in practical use?
URNs are used for persistent, location-independent resource identification, while URLs are used for direct access to resources.
Hifza Nasir
Oct 21, 2025
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About Author
Written by
Hifza Nasir
Co-written by
Dua Fatima
Hifza Nasir
Dua Fatima
Shumaila Saeed
