Compress Image
Reduce image file size without noticeable quality loss. Free, fast, 100% in your browser.
How to use
- Drag your images into the upload area, or click to select files (batch supported).
- Drag the Quality slider and watch the file size change — lower means smaller.
- Click download when you're happy; multiple images can be saved together as a ZIP.
About Compress Image
Image compression reduces the number of bytes a photo takes up so it loads faster on websites, sends more easily by email, and uses less storage. This tool re-encodes your picture with the JPEG (or WebP) algorithm at a quality level you choose. JPEG is "lossy": it discards fine detail the human eye barely notices — subtle gradients in a blue sky, tiny texture in shadows — and keeps the structure that matters. A photo straight from a phone is often 4–8 MB; at quality 70–80 it can drop to a few hundred kilobytes while still looking sharp on screen.
How to pick a quality level
For photos shared online, quality 70–80 is the sweet spot — large size savings with no obvious loss. Go to 85–90 only when you need print-grade fidelity. Below 50 you'll start to see blocky "artifacts" around edges and text. Because everything runs on your own device with the HTML5 Canvas API, your originals are never uploaded, so you can compress sensitive photos privately and instantly.