---
name: "crunchjpgs"
section: "1p"
platform: "linux"
package: "libcam-pdf-perl"
version: "1.60-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/crunchjpgs"
---

# crunchjpgs(1p)

Compress all JPG images in a PDF

## NAME

crunchjpgs - Compress all JPG images in a PDF

## SYNOPSIS

```
 crunchjpgs [options] infile.pdf [outfile.pdf]
 Options:
   -j --justjpgs       make script skip non-JPGs
   -q --quality        select JPG output quality (default 50)
   -s --scale=num      select a rescaling factor for the JPGs (default 100%)
   -m --scalemin=size  don't scale JPGs smaller than this pixel size (width or height)
   -O --only=imnum     only change the specified images (can be used multiple times)
   -S --skip=imnum     don't change the specified images (can be used multiple times)
   -o --order          preserve the internal PDF ordering for output
      --veryverbose    increases the verbosity
   -v --verbose        print diagnostic messages
   -h --help           verbose help message
   -V --version        print CAM::PDF version
```

The available values for --scale are:

```
    1  100%
    2   50%
    4   25%
    8   12.5%
```

`"imnum"` is a comma-separated list of integers indicating the images in order that they appear in the PDF.  Use *listimages* to retrieve the image numbers.

## DESCRIPTION

Requires the ImageMagick **convert** program to be available

Tweak all of the JPG images embedded in a PDF to reduce their size. This reduction can come from increasing the compression and/or rescaling the whole image.  Various options give you full control over which images are altered.

## SEE ALSO

CAM::PDF

*listimages*

*extractallimages*

*extractjpgs*

*uninlinepdfimages*

## AUTHOR

See CAM::PDF