What is a PSB file?
The .PSB extension most commonly represents the Photoshop Large Document Format, created by Adobe Systems. Professional designers and photographers use this format to store extremely large raster images. While standard .PSD files are limited to 30,000 pixels on any edge, .PSB files can support dimensions up to 300,000 pixels by 300,000 pixels. They retain all image data, including layers, masks, filters, and color channels.
However, a .PSB file can also serve different technical purposes. It is sometimes used as a game data archive for the Ethornell/CatSystem2 game engine, an animation file for E-mote, a system backup file for Siemens SIMATIC HMI panels, or even a subtitle file for PowerDivX.
How to open PSB files?
Because .PSB files are highly specialized, most basic image viewers cannot open them. You typically need Adobe Photoshop to edit them. If your file is a game archive or a system backup, you need specific extraction tools or engineering software.
Since .PSB has multiple possible meanings, we recommend using viewer.online/psb to identify the actual format of your file. viewer.online/psb analyzes .PSB files to identify their exact format and creator software, shows which programs can open the file, and usually previews it directly.
Converting PSB files
Large graphic files are difficult to share online. If you want to send an image to a client or friend, we recommend file conversion to sensible target formats on convert.guru. You can easily convert .PSB files to smaller .JPG, .PNG, or flat .TIFF files.
Summary
viewer.online/psb directly opens and previews .PSB files in the browser, eliminating the need to install software or troubleshoot compatibility issues.