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PSD file format

File extension
.psd
File category
Description
PSD – is an image file format created by Adobe for Graphic Designers to create layered images. With this format, a wide range of data from "Photoshop" is available, including texts, graphic layers, or notes. The extension can support multiple shades of gray, monochrome images, as well as CMYK and RGB color models. Such files can be converted to various formats (JEPG, PNG, and others) for subsequent transfer or storage. After changing the format, all the layers are transformed into one, which does not happen when saving with the PSD extension. In this case, they are available for viewing and editing, making them especially useful for working with drafts of various documents. The format is irreplaceable when saving the intermediate results. It is supported by most versions of Photoshop, as well as other Adobe programs.
Technical details
The PSD extension is characterized by the ability to support various visualization options, including a mask, spot colors, two-color settings, clipping. There are files with the .psb extension in some cases, which support a resolution limit of 30 thousand pixels in width and height. PSD files use the RLE compression algorithm, which allows compressing with minimal loss. However, they are still large, so it is better to use archivers for storing them on disk.
Programs
Adobe Illustrator CS6
Adobe InDesign CS6
GIMP
Main program
Adobe Photoshop
Developer
Adobe Systems
MIME type
application/psd
application/octet-stream