All about PSB files
Photoshop Large Document (over 2 GB)
When PSD becomes too restrictive, PSB steps in. Joking aside, PSD files support a maximum of 2 GB and 30,000 x 30,000 pixels. PSB files have a (currently) rather theoretical limit of 4 exabytes and 300,000 x 300,000 pixels. Apart from that, both Photoshop formats are identical and support features such as layers, masks and smart objects.
PSB is particularly useful for large-format prints (posters, billboards), high-resolution panoramas and detailed maps. Photoshop automatically prompts you to save as PSB as soon as one of the limits is exceeded.
Last updated on March 11, 2026 by Sören Ramspeck with the experience of more than 128,397,467 converted files since 2013.
Convert, open and edit PSB files
Details about PSB files
- Software for opening PSB files
- Adobe Photoshop
- GIMP
- Photopea
- Software for editing PSB files
- Adobe Photoshop
- GIMP
- Photopea
- MIME-type for PSB
- application/x-photoshop
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