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PNM at a glance
PNM
Convert to PNM when you need a plain, easily processed raster format for scripts, research, or utility pipelines.
It is useful as an intermediate representation in technical imaging workflows.
Xfig at a glance
Xfig
Technical diagrams and figures in Unix academic workflows, legacy Xfig drawing migration, and scientific publication figure production on Unix.
Format comparison
| Feature | PNM | Xfig |
|---|---|---|
| File type | Image | Vector |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | scalable |
| File size characteristics | medium | small |
| Compatibility | broad | moderate |
| Editability | moderate | high |
| Created year | 1988 | 1985 |
| Inventor | Jef Poskanzer / Netpbm lineage | Supoj Sutanthavibul |
| Status | active | legacy |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | good |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | design |
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Supported |
When to use each format
When to use PNM
- capture ingest
- editing
- web or print delivery
- Very simple to parse and generate.
When to use Xfig
- illustration
- diagramming
- brand asset delivery
- Preserves object-level editability for technical diagrams.
FAQs
Why convert PNM to Xfig?
Technical diagrams and figures in Unix academic workflows, legacy Xfig drawing migration, and scientific publication figure production on Unix.
What changes when converting PNM to Xfig?
This conversion changes how the format behaves in downstream tools and delivery environments.
Size profile changes from medium in PNM to small in Xfig. Quality profile changes from depends in PNM to scalable in Xfig. Editability profile changes from moderate in PNM to high in Xfig. Compatibility profile changes from broad in PNM to moderate in Xfig. Archival profile changes from moderate in PNM to good in Xfig. Workflow profile changes from delivery in PNM to design in Xfig.
Moving to Xfig adds vector scaling.
What should I review after converting PNM to Xfig?
Check the exported file for Closely tied to the Xfig ecosystem and long-tail compatibility workflows.; Not a mainstream modern illustration exchange format..