Reduce large PSB file size
Working with large Photoshop documents? PSB files easily reach gigabytes — and metadata bloat makes it worse.
PSB (Photoshop Big) was designed for documents Photoshop can’t fit into a regular PSD — billboard art, large composites, multi-gigapixel scans. Just like PSD, PSB files accumulate unnecessary XMP metadata over time. The difference: with files this big, even a few hundred MB of bloat becomes a real cost.
What this tool does for PSB
- Strips
DocumentAncestorsand related XMP fields - Preserves all layers, smart objects, and 64-bit binary chunks
- Output opens identically in Photoshop
- Same processing path as PSD — no special handling needed
Browser memory limit. Browsers cap a single tab at roughly 2–4 GB. The tool loads your entire file into memory, so PSBs up to ~1.5 GB usually work. For larger files, see below.
For very large files
Files above ~1.5 GB exceed what most browser tabs can hold in memory. If you regularly work with PSBs that big, a desktop-class solution is needed. We can suggest options depending on your platform and workflow — get in touch.
FAQ
Why is my PSB so much bigger than my PSD?
PSB (Large Document Format) supports documents larger than 30000×30000 pixels and over 2 GB. The format itself is similar to PSD but with 64-bit offsets. The bloat sources are the same: accumulated XMP metadata.
What’s the file size limit for the browser version?
Browsers cap a single tab’s memory at roughly 2–4 GB. The tool loads your file into memory, so files up to ~1.5 GB usually work reliably. Above that, your browser may run out of memory mid-process.
What if my PSB is bigger than 1.5 GB?
For files this large you’ll need a desktop solution that processes the file outside the browser memory cage. Get in touch and we can suggest options for your workflow.
Can I batch-process many PSBs?
Not in the browser — the UI processes one file at a time. For batch needs, contact us about workflow options.