Why Images Look Blurry on Your Website (And How to Fix It)

You upload a photo that looks crisp on your computer, publish the page, and it comes out soft or fuzzy. It's one of the most common complaints from people running a website, and it's frustrating because the original file looks fine.

In almost every case the image itself isn't the problem. The problem is the relationship between the image's pixel dimensions, the size the browser displays it at, the screen it's viewed on, and how much it was compressed along the way. Once you know which of those is responsible, the fix usually takes a few minutes.

1. The image is smaller than the space it fills

This is the cause most of the time. If your theme displays an image in a 1200px-wide column but the file you uploaded is only 600px wide, the browser has to stretch every pixel to twice its size. It fills the gaps by guessing (interpolating), and that guessing produces soft edges, blurry text and muddy fine detail.

How to check: right-click the image in Chrome or Edge and choose Inspect. Hover over the <img> element: the tooltip shows the displayed size and, next to it, the file's natural ("intrinsic") size. If the displayed width is larger than the intrinsic width, you've found the problem.

Fix: upload a version that is at least as wide as the largest size it will ever be displayed at. Go back to the original photo, not a copy you already shrank, and export it at the right width.

2. High-density (Retina) screens need more pixels

Modern phones, MacBooks and many Windows laptops have screens that pack two or three physical pixels into every CSS pixel. An image displayed at 800 CSS pixels wide on such a screen is actually drawn across 1600 or more physical pixels. If the file is only 800px wide, it will look slightly soft on those screens even though it looks perfect on an ordinary monitor.

The fix is to give the browser a sharper version to choose from with srcset:

<img
  src="team-photo-800.jpg"
  srcset="team-photo-800.jpg 1x, team-photo-1600.jpg 2x"
  width="800" height="533"
  alt="Our team at the 2026 company retreat"
/>

Browsers on standard screens download the 800px file; browsers on high-density screens download the 1600px one. If you use WordPress, it generates these sizes for you automatically as long as the image you upload is large enough in the first place.

3. CSS is stretching or squashing the image

A common CSS pattern forces images into a fixed box:

.card img {
  width: 100%;
  height: 300px;
}

If the image's shape doesn't match that box, the browser distorts it, and distortion reads as blur. Either let the height follow the width:

.card img {
  width: 100%;
  height: auto;
}

or, if you need a fixed-height box, crop instead of stretching with object-fit:

.card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

4. The image was compressed too hard

Compression is good: it's what makes pages load quickly. But JPG and WEBP compression throw information away, and if you push the quality setting too low you get blocky patches in smooth areas like sky, halos ("ringing") around sharp edges, and smeared texture. Many people also compress the same file several times, for example once in a phone app, again in an online tool and again in their CMS, and each pass removes more detail.

As a starting point, JPG quality around 80–85 and WEBP quality around 75–82 keep photos looking clean at a fraction of the original size. Always compress once, from the original, rather than re-compressing a file that has already been compressed.

5. The wrong format for the content

Photographs and graphics behave very differently. JPG is designed for photos and handles them well, but it smears the sharp edges in logos, screenshots and images containing text. PNG keeps those edges perfectly sharp but produces enormous files for photographs.

• •Photos: JPG or WEBP.
• •Logos, icons, screenshots, diagrams, anything with text: PNG, or SVG for logos and icons if you have a vector version.

6. Your platform re-processed the image

Some website builders and page builders automatically resize and re-compress uploads, sometimes quite aggressively. If your image looked fine before upload but blurry afterwards, check your platform's media settings. Look for options such as "image quality", "optimize images" or a maximum upload size, and compare the file the page actually serves (open the image in a new tab and check its dimensions) with the one you uploaded.

Recommended widths for common uses

A quick troubleshooting checklist

1. 1Inspect the image: is the natural width at least as large as the displayed width, ideally double it?
2. 2Check the CSS: is anything forcing a width and height that don't match the image's shape?
3. 3Look closely for blocky patches or halos around edges, which point to over-compression.
4. 4Make sure photos are JPG or WEBP and graphics with text are PNG or SVG.
5. 5Open the served image in its own tab to see whether your platform changed it.

Fixing the first two usually solves the problem on its own. If you need to prepare a correctly sized copy, BG Bueno's Image Resizer and Image Compressor both run in your browser, so you can resize from the original and compress once without uploading the file anywhere.