PSD (Adobe Photoshop Document) Image Format

Format name: Adobe Photoshop Document
File extension: .psd, .pdd

PSD (an abbreviation from "PhotoShop Document") is Adobe Photoshop's native image format, though some other applications can read it too. This format can store a bitmap image with multiple layers, additional color channels, masks, and other information. If you have mastered Adobe Photoshop, surely you can fully appreciate the usefulness of P.S.D., which lets you save all complexity of the image that you created. Starting from version 5, Adobe Photoshop can save files using a compression that reduces file size but doesn't affect image quality.