Convert PSB to HEIC 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 HEIC flattens the document and encodes the result as a HEIC image - and here HEIC's efficiency really pays off, since HEVC compression typically lands 40-50% smaller than an equivalent-quality JPEG on gigantic canvases where every percentage point is hundreds of megabytes. HEIC handles huge dimensions by tiling the image into an internal grid (the same mechanism iPhone uses), but many viewers still struggle above roughly 100 megapixels, and HEIC's 10-bit encoding preserves the smooth gradients of matte paintings that 8-bit JPEG would band. For practical sharing, downsize 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 a downsized review image because few applications outside Photoshop and Affinity Photo handle PSB natively. For non-massive canvases use PSD-to-HEIC 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, and large-format print. HEIC makes an unusually good preview target for PSB: its HEVC encoder supports 10-bit color, so the smooth gradients that dominate matte work survive with less banding than an 8-bit JPG - in a file roughly half the size.

Converting PSB to HEIC is a common workflow requirement wherever different software systems, platforms, and applications need to exchange image or document content. Whether you are preparing files for web publishing, print production, client delivery, or meeting upload requirements, having the right format is the starting point for every distribution workflow.

PSB files are tied to specific software ecosystems and tools. When that content needs to move into a context that requires HEIC - A different editing environment, a submission portal, a print service, or a sharing platform - A fast, reliable converter removes the format barrier without requiring software installation or technical knowledge.

heic.now processes your file securely in the cloud and returns a clean HEIC output that meets the format specification of standard applications and platforms. Files are processed privately and automatically deleted after 24 hours - Nothing is stored beyond what is needed to complete your conversion.