使用 压缩图片 之前的常见问题。
Drefly re-encodes the image at a lower quality and, if needed, a smaller resolution, choosing PNG or JPEG output automatically based on whether the image needs transparency.
Original keeps full source quality and only re-encodes if that shrinks the file, Low keeps very high quality with modest savings, Medium balances size and quality, and High gives the smallest file for casual use.
Original is designed to avoid visible loss. Low, Medium, and High trade some visual quality for a smaller file, with High reducing quality the most. Medium is a good default for web use.
Yes, compressing an image is completely free with no signup and no limit on how many images you compress.
Drefly