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PSB at a glance
PSB
Convert to PSB when the image must remain editable in Photoshop at very large dimensions or layer counts.
It is useful for oversized composites, print backdrops, and complex production artwork.
LWP at a glance
LWP
Convert to LWP when maintaining compatibility with Lotus-era document archives or when an inherited repository still depends on Word Pro files.
In most modern contexts the practical task is to open, preserve, or migrate LWP documents into DOCX, ODT, or PDF.
Use LWP only when the surrounding workflow truly still depends on it.
Format comparison
| Feature | PSB | LWP |
|---|---|---|
| File type | Image | Document |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | medium | medium |
| Compatibility | broad | broad |
| Editability | moderate | moderate |
| Created year | 1990 | 1996 |
| Inventor | Adobe | Lotus Development Corporation / IBM |
| Status | proprietary | active |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | strong |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | exchange |
| Vector scaling | Not supported | Not supported |
When to use each format
When to use PSB
- capture ingest
- editing
- web or print delivery
- Preserves rich editable raster-document state.
When to use LWP
- authoring
- review and collaboration
- distribution
- Important in office-suite history.
FAQs
Why convert PSB to LWP?
Convert to LWP when maintaining compatibility with Lotus-era document archives or when an inherited repository still depends on Word Pro files.
In most modern contexts the practical task is to open, preserve, or migrate LWP documents into DOCX, ODT, or PDF.
Use LWP only when the surrounding workflow truly still depends on it.
What changes when converting PSB to LWP?
This conversion changes how the format behaves in downstream tools and delivery environments.
Archival profile changes from moderate in PSB to strong in LWP. Workflow profile changes from delivery in PSB to exchange in LWP.
What should I review after converting PSB to LWP?
Check the exported file for Largely obsolete as a current editable target.; Less familiar than other legacy office formats to modern users..