How to Reduce Image Size Without Noticeable Quality Loss

Images often account for more than half of a web page's total weight. A single uncompressed photo from your phone's camera can exceed 5 MB — enough on its own to slow down an entire page on mobile networks. Fortunately, most images can be shrunk to a tenth of their size without any difference you can see.

Understand Image Formats First

• JPG: best for photographs; lossy compression with no noticeable loss.
• PNG: best for graphics, logos, and text; lossless but larger, and it supports transparency.
• WebP: a modern format that combines the best of both — small file size, high quality, and transparency support.

Three Steps to a Lighter Image

First, resize: there's no need for a 4000-pixel-wide image if it will be displayed at 800 pixels. Resizing alone can save 80% of the weight.

Second, pick the right format: a photograph? Use JPG or WebP. A screenshot with text in it? PNG or WebP.

Third, tune the quality: 70–80% for JPG and WebP is the golden balance between size and appearance.

The Privacy of Your Photos

When compressing personal photos, be careful: some websites upload your images to their servers. Local tools that run entirely inside the browser — like our image compression tool — process your photos on your own device and never send them anywhere.