Image
What is a .pk file?
A .pk file is a Peak Graphical Waveform File. This is an image format — a picture, drawing or graphic.
How to open a .pk file
- GIMP (free) and IrfanView open a very wide range of image formats, including obsolete ones.
- XnView MP is the best bet for unusual or legacy image types.
- Your operating system's built-in viewer may work for mainstream formats.
The registry records this extension against Peak Graphical Waveform File, so software from that family is the most likely match.
How to convert a .pk file
- Open it in GIMP or XnView and export as .png (lossless) or .jpg (smaller).
The technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .pk.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Peak Graphical Waveform File | — | — | fmt/330 |