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Stands forPhotoshop Document

initialism (file extension)P S D, letter by letter

What Does PSD Stand For?

TechDesign filesUpdated Oct 30

What does PSD stand for? In most searches it stands for Photoshop Document, the native file format of the Photoshop image editor: P and S come from Photoshop, and D is for document. A file that ends in .psd is a working image file that keeps every layer, mask and text box separate so you can keep editing later.

Outside design work, the same letters have other jobs. Engineers use PSD for power spectral density, and security and police teams use it for personal security detail or police service dog. Nearby words usually settle which sense is intended.

Quick facts

  • Stands for

    Photoshop Document (file extension .psd)

  • Other meanings

    Power spectral density, personal security detail, police service dog

  • Type

    Initialism, said letter by letter

  • Used in

    Graphic design, photo retouching, web and print layouts

  • Keeps

    Layers, masks, text, effects and guides

  • Not to be confused with

    PDF, a fixed page format for sharing and printing

What does PSD stand for in file names?

When you download a template or receive art from a designer, the file may end in .psd. That ending marks the format Photoshop saves by default. Think of it as the editable master, the version with all the pieces still apart.

A flat image such as a JPG or PNG is like a printed photo: everything is merged into one picture. A PSD file is more like a stack of clear sheets. One sheet holds the background, another holds a logo, another holds the headline text. You can move, hide or change any sheet without touching the rest.

Designer's email: "Attached are the poster PSD and a PNG preview." The PSD is for anyone who needs to edit the poster. The PNG is for quick viewing or posting.

What a PSD file holds

  • Layers: separate image parts stacked in order.
  • Masks: areas hidden or shown without deleting pixels.
  • Text layers: words that stay editable, with their font settings.
  • Adjustment layers: color and brightness changes you can undo at any time.
  • Guides and color settings: layout lines and the color profile, such as RGB for screens.

All that detail makes PSD files large, often many times the size of the exported image. For very large projects there is a related format with the extension .psb, built for files beyond the regular size limit.

Other PSD meanings by field

PSD outside the design studio
FieldStands forExample
Graphic designPhotoshop Document"Send me the PSD so I can fix the text."
Engineering, physicsPower spectral density"The PSD plot shows a spike at 60 hertz."
Security, militaryPersonal security detail"A PSD team escorted the delegation."
PolicePolice service dog"PSD units searched the field."
SchoolsPublic school district, in many district names"PSD will close early Friday."

A clothing label also uses the letters as a brand name. If the letters appear on an invoice or a school notice, read the words around them before deciding. A larger list of computer letters is in our tech acronyms section.

How to open and share a PSD

The program that created the format opens it fully, layers and all. Several other image editors, including some free ones, can open PSD files too, though complex effects may not look exactly the same. Many computers can show a flat preview without any editing tool.

  1. Keep the PSD as your master copy and never overwrite it with a flat export.
  2. Export a JPG or PNG for the web, or a PDF for print proofs.
  3. Before sending, check that fonts are included or converted, since text layers need the font installed to display right.
  4. Use a shared drive or file link for big files. Many email systems refuse large attachments.

PSD vs PDF and other look alikes

PSD and PDF differ by one letter and are easy to swap in a hurry. A PDF is a finished, fixed page meant for reading or printing. A PSD is an editable workspace for building images. A print shop may ask for a PDF, while a designer taking over your project will want the PSD.

Also watch for PSB, the large size version of the same format, and for older file types such as TIFF, which can also store layers in some programs. When someone simply says "the source file," they often mean the PSD.

Saying and writing PSD

Say it as three letters, "P S D." Write it in capitals in sentences, such as "the PSD," and in lowercase only when you mean the file ending itself: banner.psd. Use a before it, since "pee" opens with a hard sound: "a PSD file." The plural is PSDs, with no apostrophe.

Questions people ask

What does PSD mean in design?

It means Photoshop Document, the layered working file of that image editor. It saves each part of an image on its own layer so the design can be changed later.

Can I open a PSD file without the original program?

Often yes. Several other image editors can open PSD files, and many systems show a preview. Complex effects or text may not display perfectly outside the original program.

Is a PSD file the same as a JPG?

No. A JPG is a single flattened picture that is easy to share. A PSD keeps layers and edits, so it is larger and meant for editing, not for posting.

What does PSD stand for in the military?

For soldiers and protection teams, PSD usually means personal security detail. That is a small team that protects a specific person while they travel or work.

What is the plural of PSD?

Add a small s and skip the apostrophe: PSDs. For example: "I saved both PSDs to the shared folder."