Lightroom is a photo editing software that supports a variety of file formats. Some of the supported file formats are JPEG, PNG, TIFF, and RAW. The following is a list of some of the most common file formats that Lightroom supports: JPEG: This format is used to store images as JPEG files. PNG: This format is used to store images as PNG files. TIFF: This format is used to store images as Tiff files. RAW: This format is used to store images as RAW files.