Why Does My Photo Look Blurry After Compressing? How to Fix It

Oct 24, 2026 · 3 min read · Media

You shrink a photo to fit a form or a website, and it comes out soft, blotchy or full of little squares. That does not mean compression is bad. It usually means the file was asked to do something it cannot do well. Here is what is going on and how to get a small file that still looks sharp.

Too many pixels for the file size

The most common cause is keeping a huge picture while forcing it into a tiny file. A 4000-pixel-wide photo squeezed into 50 KB has almost no data to spend on each pixel, so detail is thrown away everywhere. The same 50 KB spread over a 600-pixel-wide photo looks crisp.

Fix: make the picture smaller in pixels first. In the image compressor, set Max width to what you actually need, such as 600 pixels for a form photo or 1600 for a website, and then set the target size or quality. The target-size option does this for you when it has to, but choosing a sensible width yourself gives the best result.

Compressing a photo that was already compressed

Every time a JPG is saved again, it loses a little more detail. A photo that came through WhatsApp, Instagram or an email has already been squeezed once, often heavily. Compressing it again adds a second layer of blur and blocks.

Fix: always start from the original photo in your phone's gallery or camera folder, not a copy that was sent to you.

Quality set too low

Below about 40% JPG quality, blocks and smears start to show, especially in skies, skin and smooth walls.

Fix: keep quality at 70 to 85% for photos, and make the file smaller by reducing the width instead. If you need an exact size, use Target size (KB), which always picks the highest quality that fits.

The wrong format for the picture

• Screenshots and text saved as JPG get fuzzy edges around letters. Use PNG for screenshots, logos and drawings.
• Photos saved as PNG stay sharp but are very large. Use JPG or WebP for photos.
• WebP is often smaller than JPG at the same quality, so try it for websites. Some forms do not accept it, so use JPG for applications.

More on choosing a format in our guide to PNG, JPG and WebP.

It was blurry before you started

A photo taken in dim light is full of grainy noise, and the camera smooths it away, which already softens the picture. Compression then has to store all that noise, which makes the file large and the result worse.

Fix: take the photo in daylight, hold the phone steady, and tap on the subject to focus. A good original compresses far better than any setting can rescue a poor one.

The website shrinks it again

Many sites and apps compress every photo you upload. If you upload an already small, compressed file, it gets squeezed twice. For social media, upload a moderately sized photo (around 1080 to 2048 pixels wide, quality 85%) and let the site do the rest. For forms with fixed sizes, use the exact size the form asks for, such as our SSC or bank exam presets, so the portal does not need to resize it.

Frequently asked questions