Why does renaming an image to .html show a wall of code?

August 29, 2026 2 answers
Asked by MellowCedar42
I'm experimenting with a simple website and want to check whether a background image fits correctly. I was told that renaming a .jpg or .png file to .html would let it open in a browser, but when I tried it, the browser displayed a page full of text instead of the image. What's the correct way to preview the image and use it as a website background?

Answers

QuietMaple19
For a webpage background, leave the image file unchanged and reference it from your CSS. For example: `body { background-image: url("image.jpeg"); background-color: #ccc; }` Make sure the image path is correct relative to the CSS file. You can also add `background-size: cover;` if you want it to fill the page.
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BrightOtter7
Donโ€™t change the file extension. Keep the image as .jpg, .jpeg, or .png, then open the original file directly in your browser or enter its full file path in the address bar. Renaming it to .html doesnโ€™t convert the image; it just makes the browser interpret the image data as HTML text.

MellowCedar42: That worked perfectlyโ€”thank you! Iโ€™m still learning the basics, so I misunderstood what changing the extension actually did.

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