Absolute vs relative URLs in HTML

Introduction

URLs tell the browser where to find files like web pages or images. Absolute and relative URLs help link to these files in different ways.

When linking to a website or file on a different domain, use an absolute URL.

When linking to a file within the same website folder, use a relative URL.

When moving your website to a new domain but keeping the same folder structure, relative URLs make updates easier.

When sharing a link that should always go to the exact same place, use an absolute URL.

When organizing files inside your website and linking between them, use relative URLs.

Syntax

HTML

Absolute URL example:
<a href="https://example.com/page.html">Link</a>

Relative URL example:
<a href="page.html">Link</a>

An absolute URL includes the full web address starting with http:// or https://.

A relative URL points to a file based on the current page's location, without the full address.

Examples

This is an absolute URL linking to Google's homepage.

HTML

<a href="https://www.google.com">Google</a>

This is a relative URL linking to a file named about.html in the same folder.

HTML

<a href="about.html">About Us</a>

This relative URL goes up one folder and then to contact.html.

HTML

<a href="../contact.html">Contact</a>

This relative URL starts from the website root folder to find the logo image.

HTML

<a href="/images/logo.png">Logo</a>

Sample Program

This page shows two links: one uses an absolute URL to go to Google, the other uses a relative URL to go to an About page in the same folder.

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Absolute vs Relative URLs</title>
</head>
<body>
  <h1>Links with Absolute and Relative URLs</h1>
  <p>Absolute URL link to Google:</p>
  <a href="https://www.google.com" target="_blank" rel="noopener noreferrer">Go to Google</a>
  <p>Relative URL link to About page (assumed in same folder):</p>
  <a href="about.html">About Us</a>
</body>
</html>

Important Notes

Absolute URLs are best when linking outside your website.

Relative URLs keep your links working if you move your site to a new domain.

Use target="_blank" and rel="noopener noreferrer" for safe new tab links.

Summary

Absolute URLs include the full web address and work anywhere.

Relative URLs depend on the current page location and are good for internal links.

Choosing the right URL type helps keep your website links working well.

Practice

1. Which of the following best describes an absolute URL?

easy

A. A link that starts with a slash, like /images/photo.jpg

B. A full web address including protocol and domain, like https://example.com/page

C. A link that points to a file in the same folder, like photo.jpg

D. A URL that only works on your local computer

Solution

1. Step 1: Understand what an absolute URL is

   An absolute URL includes the full address: protocol (http/https), domain, and path.

2. Step 2: Compare options to definition

   A full web address including protocol and domain, like https://example.com/page shows a full address with protocol and domain, matching the absolute URL definition.

3. Final Answer:

   A full web address including protocol and domain, like https://example.com/page -> Option B

4. Quick Check:

   Absolute URL = full web address [OK]

Hint: Absolute URLs always start with http:// or https:// [OK]

Common Mistakes:

• Confusing relative URLs with absolute URLs
• Thinking a URL starting with / is absolute
• Believing file names alone are absolute URLs

2. Which of these is the correct way to write a relative URL to link to a file named style.css in the same folder?

easy

A. style.css

B. https://example.com/style.css

C. /style.css

D. ../style.css

Solution

1. Step 1: Understand relative URLs in the same folder

   A relative URL to a file in the same folder can be just the file name.

2. Step 2: Check options for correct relative URL

   style.css uses just style.css, which correctly points to the file in the same folder.

3. Final Answer:

   style.css -> Option A

4. Quick Check:

   Relative URL same folder = file name only [OK]

Hint: Use just the file name for same-folder relative URLs [OK]

Common Mistakes:

• Using a leading slash which points to root folder
• Using full URLs when relative is needed
• Using ../ which points to parent folder

3. Given the current page URL is https://example.com/blog/post1.html, what will the browser load for the relative URL ../images/pic.jpg?

medium

A. https://example.com/images/pic.jpg

B. https://example.com/blog/images/pic.jpg

C. https://example.com/blog/post1.html/images/pic.jpg

D. https://images/pic.jpg

Solution

1. Step 1: Understand the meaning of .. in relative URLs

   .. means go up one folder from the current page location.

2. Step 2: Apply to current URL

   Current URL folder is /blog/. Going up one folder leads to /. Then adding images/pic.jpg gives /images/pic.jpg.

3. Final Answer:

   https://example.com/images/pic.jpg -> Option A

4. Quick Check:

   .. moves up one folder [OK]

Hint: .. means go up one folder in URL path [OK]

Common Mistakes:

• Thinking .. stays in the same folder
• Appending path without going up folder
• Confusing relative with absolute URLs

4. You wrote this HTML link: <a href="images/photo.jpg">Photo</a> on the page https://example.com/about/index.html, but the image does not load. What is the likely problem?

medium

A. The URL should be absolute starting with https://

B. The relative URL is missing a leading slash to start from root

C. The file extension .jpg is incorrect

D. The relative URL points to a folder that does not exist relative to current page

Solution

1. Step 1: Understand relative URL resolution

   The relative URL images/photo.jpg looks for an images folder inside the current folder /about/.

2. Step 2: Check folder existence

   If the images folder is not inside /about/, the link will break. This is the likely cause.

3. Final Answer:

   The relative URL points to a folder that does not exist relative to current page -> Option D

4. Quick Check:

   Relative URLs depend on current folder [OK]

Hint: Check if relative folder exists where page is located [OK]

Common Mistakes:

• Assuming relative URLs start from root without slash
• Using absolute URLs unnecessarily
• Ignoring folder structure when linking

5. You want to link to the homepage from a page at https://example.com/products/item.html. Which URL should you use to ensure the link works correctly regardless of the current page location?

hard

A. /index.html

B. index.html

C. https://example.com/index.html

D. ../index.html

Solution

1. Step 1: Understand absolute vs relative URL behavior

   Relative URLs depend on current page location, so they may break if page moves.

2. Step 2: Choose URL that works anywhere

   An absolute URL with full domain always works regardless of page location.

3. Final Answer:

   https://example.com/index.html -> Option C

4. Quick Check:

   Absolute URL works anywhere [OK]

Hint: Use full URL to avoid relative path issues [OK]

Common Mistakes:

• Using relative URLs that break if page moves
• Assuming leading slash always works for all pages
• Not including protocol and domain for absolute URLs