Image Compressor

Image compression works by adjusting the quality value to reduce the file size. The JPG and WebP formats in particular let you adjust the compression rate, so you can shrink the file size while keeping a reasonable level of quality. A higher compression rate makes the file smaller but can make the image look blurry or lose detail. Keeping the quality value high, on the other hand, looks better but offers less size reduction.

No. The image you choose is not sent to a server; it's processed entirely in your browser. Compression happens locally, and you download only the result image yourself. Files you'd rather not upload to an external server — like personal photos, document captures, or work images — can be compressed more safely.

Some quality can be lost depending on the compression settings. With an appropriate quality value, though, you can keep the difference hard to notice while significantly reducing the file size. In general, web images often don't need the original's top quality. For blog, thumbnail, banner, and detail-page images, it's best to choose a suitable quality while checking the preview.

PNG files can be handled too, but it may differ from the way JPG or WebP shrink the size by lowering the quality value. PNG is strong at preserving transparent backgrounds and crisp images, but for images with many colors, like photos, the file size can grow. If you want to reduce the size of a PNG image, you can convert it to WebP, or — if you don't need a transparent background — consider saving it as JPG.

Yes, the original image stays intact. Compression doesn't modify the original file directly; it works by creating a new compressed file for you to download. For example, even if you compress photo.jpg, the original file stays on your device, and only the compressed result image is saved anew.

How much the size drops depends on the image format, resolution, number of colors, and the compression quality value. For JPG images with many colors, like photos, lowering the quality just a little often reduces the size a lot. On the other hand, images that are already limited in compression efficiency — like solid-color logos, icons, or transparent PNGs — may see only a small reduction. The sizes before and after compression are shown together, so you can check the savings right away.

WebP is a great image format for use on websites. It can generally deliver a similar level of quality at a smaller file size than JPG or PNG, which helps improve page load speed. When you want to optimize images for websites, blogs, landing pages, or thumbnails, the WebP save option is especially handy.

Yes, you can select and compress images in mobile browsers too. Compress a photo or screenshot saved on your phone right away to reduce its size. That said, high-resolution photos or large images can take longer depending on your mobile device's performance, so large images may be more stable to work with on a PC.