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FB2 at a glance
FB2
FB2 became especially visible in Eastern European ebook ecosystems, where community standards and open library habits shaped ebook distribution differently from Kindle or EPUB-first markets.
PNM Raw at a glance
PNM Raw
PNM survived because engineers kept needing a no-drama raster family for scripts, fixtures, codecs, and image-processing experiments where the format should not be the hard part.
Format comparison
| Feature | FB2 | PNM Raw |
|---|---|---|
| File type | Ebook | Image |
| Extensions |
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| MIME type |
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| Created year | 2004 | 1988 |
| Inventor | Russian eBook community | Jef Poskanzer |
| Status | active | active |
| Primary use cases |
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When to use each format
When to use FB2
- Your source file is already in FB2.
- Preserve source expectations before exporting to PNM Raw.
- FB2 is commonly used in ebook workflows.
When to use PNM Raw
- Your target workflow expects PNM Raw.
- Improve delivery compatibility with PNM Raw.
- PNM Raw is commonly used in image workflows.
FAQs
Why convert FB2 to PNM Raw?
Convert to PNM raw when you need a no-frills lossless raster format for scripts, benchmarking, image-processing experiments, or toolchains that prefer direct pixel access with minimal container complexity.
It is especially useful as an intermediate representation between automated processing steps.
What changes when converting FB2 to PNM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting FB2 to PNM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.