How to Compress an Image Without Losing Quality
A practical guide to shrinking image file sizes for the web, email and social media while keeping them sharp — no software required.
Large images slow down websites, clog inboxes and eat up storage. The good news: with the right settings you can cut an image's file size by 50–80% while keeping it looking crisp. Here's how.
Choose the right format first
Format matters more than any other single setting:
- JPG — best for photographs and complex images with lots of colour.
- PNG — best when you need transparency or razor-sharp edges (logos, screenshots).
- WebP — a modern format that usually beats both, with smaller files at the same quality.
Lower the quality — just a little
JPG and WebP use lossy compression, controlled by a quality slider. The trick is that the last 10–20% of quality adds a lot of file size for almost no visible difference. Setting quality to around 70–80% is the sweet spot for most photos — dramatically smaller with no obvious loss.
Resize before you compress
If your image is 4000px wide but it will only ever display at 1200px, you're storing millions of wasted pixels. Resizing to the size you actually need is often the single biggest saving you can make.
Compress it in your browser
You don't need to install anything or upload your photos to a stranger's server. Our compressor runs entirely on your device — pick a format, drag the quality slider, and watch the file size drop in real time.
Try the tool
Image Compressor