PSB ("Photoshop Big") is PSD's large-format sibling — the same layered structure, sized for documents beyond 30,000 pixels that plain PSD cannot hold.
Typical use: Convert PSB files like PSD — layers and composite extract the same way.
About the PSB format
PSD is Adobe Photoshop's native document format and the source-of-truth file of the design industry. It keeps everything editable: layers with masks, adjustment layers, smart objects, layer effects and live text. The format is big-endian and only partially documented, but its ubiquity means libraries in every language can read the common parts.
Two practical gotchas define PSD life outside Photoshop. First, files are enormous — hundreds of megabytes is normal for layered work. Second, the flattened composite other apps display is only embedded when the file was saved with “Maximize Compatibility” enabled; without it, converters that read the composite will fail. Sharing to non-designers means exporting a JPG, PNG or PDF copy.
Strengths
- ✓ Fully editable: layers, masks, effects and live text
- ✓ The universal design source format
- ✓ Smart objects allow non-destructive scaling and filters
Limitations
- ✗ Very large files
- ✗ Full fidelity requires Photoshop or Creative Cloud apps
- ✗ Composite preview may be missing without Maximize Compatibility
- Compression
- Lossless (RLE/ZIP layers)
- Transparency
- Per-layer alpha
- Animation
- Timeline exists, exported as frames
- Metadata
- XMP, EXIF, guides, paths
- Best for
- Design source files
Convert PSB to…
39 direct directions plus 9 workflows, sorted A–Z; 🔥 marks popular targets.
Cross-engine workflows
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Frequently asked questions
What is a PSB file?
PSB ("Photoshop Big") is PSD's large-format sibling — the same layered structure, sized for documents beyond 30,000 pixels that plain PSD cannot hold.
How do I convert PSB files online?
Pick a target format from the "Convert PSB to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.
Is it safe to convert PSB files here?
Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.
Which formats can PSB convert to?
This page lists all 48 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.