Reduce image file sizes in your browser and choose how much quality to keep. Supports JPG, PNG, SVG, GIF and WebP.
High (95%) keeps almost all detail and gives a modest saving. Medium (75%) is a good default for photos going to a website or an email. Low (50%) gives the smallest files, but fine detail and small text can turn soft or blocky, so check the result before you use it. If compressing a file would make it larger, the original is kept instead.
Each format is handled differently. JPG and WebP photos are re-saved at the quality you choose. Below 90%, PNGs are reduced to a limited colour palette, which often shrinks screenshots and graphics a lot but can add bands to smooth gradients. GIFs keep fewer colours at lower settings, and SVGs are cleaned up and their numbers rounded rather than turned into pixels. For JPG, PNG, WebP and GIF, hidden metadata such as camera details and location is removed as well.
No. Compression runs in your browser, so your images stay on your device the whole time.
It can. Compression removes detail that is hard to notice, and the lower the quality setting, the more it removes. At High the difference is rarely visible. At Low, zoom in on fine detail and text before you use the result.
Some images are already compressed about as far as they can go. When re-saving would make a file larger, the tool keeps the original and shows 0%. Try a lower quality level, or for a photo saved as PNG, convert it to JPG, which usually makes it much smaller.
No. Compression changes the file size, not the width and height. To make an image smaller in pixels as well, use the image resizer first, then compress the result.