Welcome to a tutorial on how to create a responsive fullscreen background image in HTML CSS. Need to add a background image that will look nice on both big and small screens?

Creating a responsive fullscreen background image is as easy as setting a background image to cover the entire window – body { width: 100vw; min-height: 100vh; background: url("IMAGE") center no-repeat; background-size: cover; }.

That covers the quick basics, but read on for the example!

DOWNLOAD & DEMO

Here is the download link to the example code, so you don’t have to copy-paste everything.

EXAMPLE CODE DOWNLOAD

Click here to download

The example code is released under the MIT license, so feel free to build on top of it or use it in your own project.

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RESPONSIVE BACKGROUND DEMO

CITY LIFE

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

RESPONSIVE FULLSCREEN BACKGROUND IMAGE

All right, let us now get into the examples of how to create responsive background images.

TUTORIAL VIDEO

PART 1) THE HTML

background.html

<!DOCTYPE html>
<html>
  <head>
    <title>Responsive Background Image</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="background.css">
  </head>
  <body>
    <main>
      <h1>CITY LIFE</h1>
      <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </main>
  </body>
</html>

Yes, that’s all it takes to create a responsive full-page background image.

We will be applying the background image onto <body>.
Then, <main> will serve as the “foreground content”.

PART 2) THE CSS

background.css

/* (A) FILL ENTIRE WINDOW */
body, main {
  width: 100vw;
  min-height: 100vh;
}
 
/* (B) <BODY> - BACKGROUND */
body {
  /* (B1) REMOVE DEFAULT PAGE SPACING */
  margin: 0; padding: 0;
 
  /* (B2) BACKGROUND IMAGE */
  background: url("city.webp") center no-repeat;
  background-size: cover;
}
 
/* (C) <MAIN> - FOREGROUND */
main {
  padding: 20px;
  color: #fff;
  background: rgba(0,0,0,0.5);
}

Just what is happening here?

We set both <body><main> to width: 100vw and min-height: 100vh. This will make the page fill up the entire window by default.
Remember that <body> will serve as the background?
- (B1) First, use margin: 0; padding: 0; to remove the annoying default page spacing.
- (B2) background: url("city.webp") center no-repeat Set the background image, centered on the page.
- (B2) background-size: cover The background image will cover the entire page. You can also set this to contain, but it will not fill the entire page.
Finally, <main> will serve as foreground content. All we are doing here is setting the font and color “as usual”. Give it a transparent background so that the text can show up a little better.

EXTRAS

That’s all for the tutorial, and here is a small section on some extras and links that may be useful to you.

LINKS & SUMMARY

Property	Description	Reference
`background-image`	Set background image.	Link
`background-size`	Set the size of the background image.	Link
`background-position`	Set the position of the background image.	Link
`background-repeat`	Repeat the background image.	Link

Perfect Full Page Background Image – CSS Tricks
How to Create a Responsive Full Background Image Using CSS – WebFX

INFOGRAPHIC CHEAT SHEET

Fullscreen Responsive Background Image (Click To Enlarge)

THE END

Thank you for reading, and we have come to the end. I hope that it has helped you to better understand, and if you want to share anything with this guide, please feel free to comment below. Good luck and happy coding!

Responsive Fullscreen Background Image In HTML CSS (Simple Example)

TABLE OF CONTENTS