Data file
What is a .pgmb file?
A .pgmb file is a Portable Grey Map - Binary. This is a data file — structured information used by a program rather than read directly.
How to open a .pgmb file
- Start with the program that produced it; that's almost always the right tool.
- Open it in a text editor to see whether it's readable text or binary.
- For database formats, DB Browser for SQLite or LibreOffice Base can often import it.
The registry records this extension against Portable Grey Map - Binary, so software from that family is the most likely match.
How to convert a .pgmb file
- If you can view the data, exporting to .csv is usually the most portable option.
The technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .pgmb.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Portable Grey Map - Binary | — | — | fmt/406 |