What is .SPP file extension?
Picture saved in the native PhotoPlus image format; may include layers, layer effects, transparency, editable text, and QuickShapes; may also include mesh data, which allows parts of the image to be distorted using the Mesh Warp tool.
SPP files are similar to Photoshop (.PSD) documents, but are created with Serif PhotoPlus.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.