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HTML at a glance
HTML
WHATWG's living-standard model replaced the idea that HTML should be treated only as a periodically finished static edition.
PGM at a glance
PGM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
Format comparison
| Feature | HTML | PGM |
|---|---|---|
| File type | Document | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1993 | 1988 |
| Inventor | Tim Berners-Lee | Jef Poskanzer / Netpbm lineage |
| Status | active | active |
| Primary use cases |
|
|
| Vector scaling | Not supported | Not supported |
When to use each format
When to use HTML
- Your source file is already in HTML.
- Preserve source expectations before exporting to PGM.
- HTML is commonly used in document workflows.
When to use PGM
- Your target workflow expects PGM.
- Improve delivery compatibility with PGM.
- PGM is commonly used in image workflows.
FAQs
Why convert HTML to PGM?
Convert to PGM when you need a straightforward grayscale raster for scripting, research, or low-overhead image processing.
It is a good target for technical pipelines and intermediate data exchange.
What changes when converting HTML to PGM?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting HTML to PGM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.