Data file
What is a .sig file?
A .sig file is a Siegfried Signature File. This is a data file — structured information used by a program rather than read directly. Confusingly, this extension has been used by 4 different formats over the years — they're all listed below.
This extension has been used by more than one format
4 different formats have claimed .sig over the years, so two files with the same extension aren't necessarily the same kind of thing.
How to open a .sig 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 Siegfried Signature File, Reduced Resolution Dataset, Broderbund The Print Shop/PrintMaster/American Greetings Project and others, so software from that family is the most likely match.
How to convert a .sig 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 .sig.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Siegfried Signature File | — | — | fmt/883 |
| Reduced Resolution Dataset | — | — | fmt/1215 |
| Broderbund The Print Shop/PrintMaster/American Greetings Project | 10-23 | — | fmt/1300 |
| PrintMaster Gold Project | 1 | — | fmt/1302 |