Convert PSB to JPG Online

PSB (Photoshop Large Document) is Adobe's extended version of the PSD format, designed for canvases that exceed PSD's 30,000 x 30,000 pixel and 2GB limits. Introduced in Photoshop CS (2003), PSB supports up to 300,000 x 300,000 pixels and a theoretical 4 exabyte file size, making it the working format for billboard-resolution prints, gigapixel panoramic stitches, IMAX matte paintings, digital painters at 60,000 pixels for highly-detailed concept art, satellite imagery composites, and AI-upscaled hero canvases that routinely cross the 2GB threshold.

Converting PSB to JPG flattens the document and rasterizes to a single JPEG at the canvas pixel dimensions. The output JPG can itself be very large - a 50,000 x 30,000 pixel PSB produces a 1.5 gigapixel JPG that some viewers struggle to open (Windows Photos and macOS Preview both throttle at roughly 100 megapixels; ImageGlass, IrfanView, and Photoshop itself handle larger). For practical sharing, downsize to a manageable resolution during conversion - 8000 pixels on the long edge is enough for most billboard and large-print review workflows.

Matte painters at ILM, Weta FX, and DNEG; concept artists working on Marvel and Disney productions; medical imaging specialists handling whole-slide pathology scans; cartographers stitching satellite tiles; and large-format printer operators are the typical PSB audiences. Most ship final deliverables as flattened TIFF or downsized JPG because few applications outside Photoshop and Affinity Photo handle PSB natively. For non-massive canvases use PSD-to-JPG instead. PSB files can take minutes to load even on M2 Ultra workstations with 64GB RAM, so be patient.

Adobe introduced the .psb (PSD Big) format with Photoshop CS in 2003 to break the 2 GB / 30,000-pixel-per-side limit of the original PSD format that had stood since 1990. PSB extends every field that PSD constrained to 32 bits, lifting the canvas ceiling to 300,000 x 300,000 pixels and removing the file-size cap. It became indispensable for VFX matte painting, gigapixel composites, panorama stitching, satellite imagery work, large-format print, and digital matte work for film. The format remains a Photoshop-only standard, with partial reads in Affinity Photo and Krita but no editor matches Photoshop's full feature set on PSB files.

PSD is Photoshop's native working format, preserving layers, smart objects, masks, and adjustment data for ongoing editing. When a composition is finished and needs to leave the Photoshop environment - For delivery to a client, upload to a platform, or insertion into a document - The file must be flattened and exported as JPG. PSD files cannot be opened by browsers, viewed in standard photo apps, or uploaded to most online platforms, so the JPG export is the mandatory final step in any Photoshop production workflow.

Retouchers who process portrait, product, and architectural photography in Photoshop produce JPG deliverables sized and compressed to the exact specifications of the end platform - Amazon product image requirements, magazine bleed dimensions, website hero image limits. These platform-specific JPG exports are the primary production output of commercial retouching work, with the PSD kept on file only as the editable source in case revision requests arrive after delivery.

Print bureaus, photo labs, and large-format print operators that receive PSD files from designers convert them to JPG before feeding the image into their RIP or print management software. Most production print workflows are calibrated for JPEG input rather than layered Photoshop documents, and flattening the PSD to JPG at a specified DPI and colour profile ensures the file enters the print pipeline correctly without requiring the print operator to have Photoshop installed.