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MD at a glance
MD
Markdown was created in 2004 by John Gruber with Aaron Swartz, but the later CommonMark effort became important because the original syntax description was too ambiguous to keep implementations aligned.
PSB at a glance
PSB
Photoshop's native format became one of the de facto interchange anchors of raster design and retouching, even outside Adobe-only teams, because so many creative pipelines converged around its feature set.
Format comparison
| Feature | MD | PSB |
|---|---|---|
| File type | Document | Image |
| Extensions |
|
|
| MIME type |
|
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| Created year | 2004 | 1990 |
| Inventor | John Gruber and Aaron Swartz | Adobe |
| Status | active | proprietary |
| Primary use cases |
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| Vector scaling | Not supported | Not supported |
When to use each format
When to use MD
- Your source file is already in MD.
- Preserve source expectations before exporting to PSB.
- MD is commonly used in document workflows.
When to use PSB
- Your target workflow expects PSB.
- Improve delivery compatibility with PSB.
- PSB is commonly used in image workflows.
FAQs
Why convert MD to 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.
What changes when converting MD to PSB?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting MD to PSB?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.