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How to open .PK files on Windows

To open .PK files on Windows, install a TeX distribution that includes the classic font utilities (for example, TeX Live).

Step-by-step instructions

  1. Install a TeX distribution that includes the classic font utilities (for example, TeX Live).
  2. Open a Command Prompt/terminal and run: pktype yourfont.pk to inspect the file’s contents (metadata and glyph information).
  3. If you need a different format for processing, convert with TeX utilities (for example, pktogf to convert PK to GF, or gftopk to produce PK from GF).

Common issues

The .pk file won’t open in a viewer or editor

A PK file is a packed bitmap font for TeX, not a document or image format meant for general-purpose viewers.

  1. Use TeX font utilities to inspect it (run pktype on the file).
  2. If you need an intermediate format for a font workflow, convert it using pktogf (PK → GF) or regenerate it from GF using gftopk.

“Command not found” when running pktype/gftopk/pktogf

The required TeX utilities are not installed or not in your PATH.

  1. Install a TeX distribution that includes these tools (for example, TeX Live).
  2. Verify the tools are available by running pktype --help (or checking your TeX installation’s documentation) and ensure the TeX bin directory is on your PATH.

The file is not a valid PK font (or pktype reports errors)

The file may be corrupted, truncated, or not actually a TeX PK font despite the .pk extension.

  1. Re-download or re-copy the file (binary-safe transfer) and try pktype again.
  2. Confirm the file’s origin: PK fonts are typically produced by gftopk from Metafont GF output; if the source is unknown, it may be a different format using the same extension.

TeX can’t find or use the PK font during typesetting

Even if the PK file is valid, TeX-related tools may not locate it due to font map/path configuration or mismatched resolution/filename conventions.

  1. Confirm the font is the expected one by inspecting it with pktype (name/checksum/metrics-related info as shown by the tool).
  2. Ensure the PK file is placed in a location your TeX setup searches for fonts (consult your TeX distribution’s font path configuration) or regenerate the PK at the required resolution via the normal Metafont → GF → PK process (gftopk).

Security note

PK files are data-only bitmap font files, not executable programs, but they are parsed by complex tooling; only open/inspect PK files from sources you trust to reduce the risk of triggering parser bugs in font utilities.

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