| Extension | .psb |
| Category | images |
| Description | PSB (Photoshop Big) is a proprietary file format developed by Adobe for storing large Photoshop documents, with dimensions up to 300,000 pixels in any dimension. PSB is a successor to the more commonly used PSD (Photoshop Document) file format, which is limited to a maximum size of 30,000 by 30,000 pixels. |
| Technical details | PSB files have a similar structure to PSD files, containing layers, masks, channels, and other features found in Photoshop. However, PSB files use a different file header and are stored in a 64-bit format to handle larger document sizes. PSB files also support all color modes available in Photoshop, such as RGB, CMYK, grayscale, and Lab. In addition to Photoshop, some other image editing software like GIMP and PaintShop Pro can open and edit PSB files. However, many applications may not support the PSB format due to its proprietary nature. |
