Krita Image Document
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What is a KRA file?
A KRA file is an image file created by Krita, a cross-platform, open source raster graphics editor. It is the native format used to save files in Krita and may include image layers, adjustment layers, assistants, masks, color spaces, and other Krita-specific elements. KRA files are similar to working files used by other image editors, such as .PSD files used by Adobe Photoshop and .XCF files used by GIMP.
You can open, edit, and save KRA files using Krita. Since KRA files are compressed with Zip compression, you can also extract and examine the contents of the KRA files. You can use a Zip decompression utility, such as Windows File Explorer, 7-Zip, or Apple Archive Utility, but you must first rename the .kra file extension to .zip.
Krita is typically used by graphic artists, such as illustrators, concept artists, and texture artists. You can create and edit images with various painting, animation, and vector tools and masks. When you are finished editing your KRA image, you can export it to a different format, such as JPEG, PNG, or GIF.
NOTE: Since the KRA file is used to save all the information about an image, it can grow rather large in size.