---
name: "funpack"
section: "1"
platform: "linux"
package: "libcfitsio-bin"
version: "4.6.2-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/funpack"
---

# funpack(1)

FITS image decompression program

## NAME

funpack - FITS image decompression program

## SYNOPSIS

**funpack** \[*OPTION*\]... *FILE*...

## DESCRIPTION

**funpack** is an utility to restore a compressed FITS image file back to its original state.

## OPTIONS

Flags must be separate and appear before filenames. Use '-' to read from stdin.

- **-E** *HDUlist* Unpack only the list of HDU names or numbers in the file.

  - **-P** *pre*

  Prepend *pre* to create new output filenames.

- **-O** *name*

  Specify full output file name.

- **-Z**

  Recompress the output file with host GZIP program.

- **-F**

  Overwrite input file by output file with same name.

- **-D**

  Delete input file after writing output.

- **-S**

  Output uncompressed file to STDOUT file stream.

- **-L**

  List contents, files unchanged.

- **-C**

  Don't update FITS checksum keywords.

- **-v**

  Verbose mode; list each file as it is processed.

- **-H**

  Show this message.

- **-V**

  Show version number.

## SEE ALSO

[**fpack**(1)](/fpack/1.md), [**fitscopy**(1)](/fitscopy/1.md).