.PSB File Extension

Photoshop Large Document Format

Developer Adobe Systems
3.5  |  45 Votes

What is a PSB file?

A PSB file is an image file created by Adobe Photoshop, a professional image-editing application. It contains an image that is larger than 30,000 x 30,000 pixels or 2 GB in size. PSB files are nearly identical to .PSD files except that they contain large images, so they tend to have large file sizes.

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Screenshot of a .psb file in Adobe Photoshop 2022
PSB file open in Adobe Photoshop 2022

When a Photoshop user wants to save an image larger than 30,000 x 30,000 pixels and preserve the layer-based edits they've made to that image, they must save the image as a PSB file. The PSB file format is designed specifically to allow Photoshop users to save large Photoshop documents, whether the document is large in actual size or file size. Images larger than 2 GB in file size must also be saved as PSB files, regardless of how many pixels they contain.

PSB files contain the same types of image, text, edit, and effect layers as PSD files. In fact, the PSB file format is roughly identical to the PSD file format, except that the PSB format supports larger images. However, the PSB format is not supported by as many programs as the PSD format, which means you may have trouble opening a PSB file outside of Photoshop and other Adobe programs.

NOTE: PSB files can contain images that are up to 300,000 x 300,000 pixels in size. Photoshop does not allow users to create images larger than 300,000 x 300,000 pixels.

How to open a PSB file

You can open a PSB file in Adobe Photoshop in Windows and macOS. To open a PSB file, select File → Open..., then choose the PSB file.

In macOS, you can preview the image a PSB file contains with the Quick Look feature (by selecting your PSB file and pressing your spacebar).

How to convert a PSB file

Adobe Photoshop can convert PSB files to the following formats:

  • .PSD - Adobe Photoshop Document
  • .PSDC - Adobe Photoshop Cloud Document
  • .PDF - Portable Document Format
  • .JPG - JPEG Image
  • .PNG - Portable Network Graphic
  • .TIF - Tagged Image File Format
  • .GIF - Graphical Interchange Format
  • .WEBP - WebP Image
  • .AI - Adobe Illustrator Artwork
  • .BMP - Bitmap Image
  • .DCM - DICOM Image
  • .EPS - Encapsulated PostScript
  • .TGA - Targa Graphic

Open and view .PSB files with File Viewer Plus.Free Download

Programs that open PSB files


PowerDivX Subtitles File

Developer PowerDivX
3.6  |  15 Votes

Movie subtitles file created for use with PowerDivX, an older multimedia player; saves subtitles in a simple text format, specifying the start and stop time of each subtitle; for example:

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{0:01:21}{0:01:51}My Movie Subtitle 1.
{0:01:21}{0:01:51}My Movie Subtitle 1.

The PSB format is still supported by VLC media player.

Programs that open or reference PSB files

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