Compress images with a quality slider and download the optimized result
An image compressor reduces the file size of a photo or graphic while keeping it looking as close to the original as possible. It works by discarding data the eye barely notices: subtle colour variations, fine detail in busy areas and precision that no screen can actually show. The result is an image that looks the same at a glance but downloads several times faster — which matters because images are usually the heaviest part of a web page and the main reason pages feel slow.
Most compression of photos is "lossy", meaning some quality is permanently traded for a smaller file; formats like JPEG and WebP let you choose how aggressive that trade is. A small drop in quality often cuts the file size dramatically with no visible difference, while pushing too far introduces blocky artefacts. This tool compresses entirely in your browser — your images are never uploaded — so you can shrink screenshots, product photos or assets for email and the web privately, and compare the result before saving.
A moderate level of compression is usually invisible — you remove data the eye cannot perceive. Quality only degrades noticeably at aggressive settings, where you may see blockiness or blur. Previewing the result lets you find the point where size drops a lot but quality still holds.
Lossy compression (JPEG, WebP) permanently removes some detail for much smaller files and is ideal for photos. Lossless compression (PNG) keeps every pixel exact but saves less space; it suits logos, screenshots and graphics with sharp edges and flat colours.
No. Compression runs entirely in your browser using your device's processor, so the images never leave your machine. This makes it safe for private photos, internal screenshots or confidential documents.
PNG is lossless, so it cannot drop detail the way JPEG does. For photographic content, converting to JPEG or WebP yields far smaller files. PNG is best reserved for images that need transparency or perfectly sharp edges.
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