Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your PSB images to TIFF64 format. This tool works for both professionals and casual users. Convert your images to TIFF64 in seconds.
Photoshop Big
The 'Large Document Format' for managing gigapixel images.
PSB (Photoshop Big) is an extension of the PSD format designed to break the barriers of the 2GB file size limit and 30,000 pixel dimension limit of standard PSD files. It is structurally almost identical to PSD but uses 64-bit offsets inside the file to support massive files up to 4 Exabytes (theoretically) and 300,000 pixels in width/height.
Internally, a PSB file mirrors the block structure of a PSD (Header, Color Mode, Image Resources, Layer and Mask Info, Image Data). The key difference is the bit-width of length integers; PSB uses 8 bytes (64-bit) where PSD uses 4 bytes (32-bit) for describing file offsets and dimensions.
Introduced in Adobe Photoshop CS (v8.0) in 2003 to support the growing needs of astronomical imaging, billboard printing, and HDR photography.
BigTIFF
TIFF for files larger than 4GB.
BigTIFF (often referred to as TIFF64) is an extension of the classic TIFF format designed to break the 4GB file size barrier. It uses 64-bit offsets instead of 32-bit, allowing for files up to 18,000 petabytes.
Standard TIFF uses 32-bit integers for file offsets, limiting the file size to 2^32 bytes (4GB). BigTIFF changes the internal structure to use 64-bit integers. It is not backward compatible with older TIFF readers that only understand 32-bit offsets.
Developed to address the needs of geospatial and medical imaging, where single images often exceed 4GB. It is supported by LibTIFF starting from version 4.0.
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