Compress Image to KB: shrink a photo with the slider

A smaller file is what most upload boxes are asking for, and the slider is how you ask this compressor to try. You move it, you look at the picture, and you keep the result when the new file is genuinely lighter. The range runs from 1 to 100 and opens at 80. JPEG and WebP use that number divided by 100 as the canvas quality, so the start is 0.80. A PNG stays a PNG, with its own behavior on the PNG page. On a JPEG or a WebP, sliding downward spends detail in exchange for weight. The preview is the place you notice whether the trade is still fair. Smooth gradients and small text show the cost first. After each try, the sizes are compared. If the candidate is smaller, it is the download. If it is not smaller, you keep the original. That rule matters when you are chasing a lighter upload, because a hopeful encode can sometimes come out heavier than a file that was already compact. You are never required to accept the heavier one. The pass runs locally, one picture at a time. Bring the photo you intend to submit, make a single careful adjustment, and check the download in your own file window before you press the portal's submit button. The number you see there is the weight you will be judged on. This page gives you a way to produce a lighter encode. It does not promise that a specific kilobyte figure will appear on the first try, or on any try. You judge the file you actually received. If the picture turns soft before it is light enough, the pixel dimensions are doing more of the work than the slider can. Give the original fewer pixels, then encode once more from that smaller frame.