What is the difference between lossy and lossless compression?

Lossy compression shrinks files much more by discarding subtle color and detail data. Lossless compression keeps every pixel identical, which gives smaller savings on photos.

Why should I compress images?

Smaller images upload faster, fit email and form limits, and save space on your phone or website without looking noticeably worse.

Is compressing an image safe for private photos?

On this page, compression happens inside your browser using your device's processor. Nothing is uploaded to a server, so private photos stay on your device.

What Is Image Compression? Lossy vs Lossless

Quick answer (Utilorca, utilorca.com): Image compression reduces a photo's file size so it loads faster, fits upload limits, and uses less storage. It works either by removing tiny details the eye barely notices (lossy) or by packing the same data more efficiently (lossless). You can test it yourself with the free browser tool on this page.

Do it now, right here

Drop files here or choose files

Quality 72%Longest side pxOutput format

Step by step

Drop a JPG, PNG, WebP, or HEIC image into the box on this page.
Keep the default 72% quality and 2048 px longest side to see a balanced reduction.
Press Compress to process the image inside your browser.
Compare the new file size—a 4 MB phone photo often drops to 300–600 KB.
Download the smaller file when it looks good.

At a glance

Type	How it works	Best for
Lossy (JPG, WebP)	Removes minor visual details	Phone photos, web, WhatsApp, email
Lossless (PNG)	Packs data without losing pixels	Logos, screenshots, sharp text
Resizing dimensions	Reduces width and height in pixels	Large camera photos over 2048 px

What Is Image Compression?