PSD

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File Format
Name PSD
Ontology
Extension(s) .psd
MIME Type(s) image/vnd.adobe.photoshop
PRONOM x-fmt/92
Released ≥1990

PSD is the native layered raster graphics file format of the Adobe Photoshop program line. The format has gone through multiple versions, each being downwards (but not always upwards) compatible.

PSD is a partially-documented proprietary format. It is very large and complex. Despite this, decoding the primary image of a PSD file is often fairly simple. If an application claims to support PSD, that could mean just about anything.

Images are usually compressed with PackBits, or uncompressed. "Zip" compression, which apparently means zlib, is also supported.

It does not appear to be possible to reliably determine the encoding used by non-Unicode text in a PSD file. A reasonable guess is MacRoman, but other encodings are common.

Contents

See Also

See Photoshop for other related formats.

Identification

PSD files begin with bytes '8' 'B' 'P' 'S' 0x00 0x01.

Specifications

Software

Viewers, editors, and converters

Libraries and tools

Sample files

Links

See also Photoshop#Links.

Commentary

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