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PAM at a glance
PAM
Convert to PAM when using Unix-style image tools or scripted workflows that benefit from a simple, explicit raster container with more flexibility than PBM/PGM/PPM.
It is useful as an intermediate technical format.
MOBI at a glance
MOBI
Convert to MOBI when the destination involves older Kindle-compatible devices, legacy ebook libraries, or compatibility requirements tied to older handheld readers.
It is useful as a bridge format during migration.
For new general-purpose ebook publishing, EPUB or newer Kindle-targeted formats are usually better.
Format comparison
| Feature | PAM | MOBI |
|---|---|---|
| File type | Image | Ebook |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | reflowable |
| File size characteristics | medium | small |
| Compatibility | broad | moderate |
| Editability | moderate | moderate |
| Created year | 2000 | 2000 |
| Inventor | Jef Poskanzer / Netpbm lineage | Mobipocket |
| Status | active | active |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | reading |
When to use each format
When to use PAM
- capture ingest
- editing
- web or print delivery
- Very simple to parse and generate.
When to use MOBI
- ebook publishing
- reader distribution
- digital libraries
- Historically important in early ebook delivery.
FAQs
Why convert PAM to MOBI?
Convert to MOBI when the destination involves older Kindle-compatible devices, legacy ebook libraries, or compatibility requirements tied to older handheld readers.
It is useful as a bridge format during migration.
For new general-purpose ebook publishing, EPUB or newer Kindle-targeted formats are usually better.
What changes when converting PAM to MOBI?
This conversion changes how the format behaves in downstream tools and delivery environments.
Size profile changes from medium in PAM to small in MOBI. Quality profile changes from depends in PAM to reflowable in MOBI. Compatibility profile changes from broad in PAM to moderate in MOBI. Workflow profile changes from delivery in PAM to reading in MOBI.
What should I review after converting PAM to MOBI?
Check the exported file for Amazon no longer accepts MOBI for new KDP uploads.; Modern open publishing workflows usually prefer EPUB or newer Kindle-oriented formats..