convert.im6

convert.im6 [options...] input-file [output-file]

-alpha
    Manage alpha (transparency) channel

-background
    Set background color

-blur
    Blur image with radius and sigma

-border
    Add border with width and height

-channel
    Apply operation to specific channels (e.g., RGBA)

-colorspace
    Set colorspace (e.g., RGB, CMYK, Gray)

-compress
    Image compression type (e.g., JPEG, LZW)

-crop
    Crop to specified widthxheight+x+y

-density
    Set resolution for input/output

-despeckle
    Reduce noise in image

-format
    Output format specifier for expressions

-fuzz
    Colors within fuzz percent match

-gravity
    Direction for positioning (North, Center)

-quality
    Compression quality (0-100)

-resize
    Resize image (e.g., 800x600, 50%)

-rotate
    Rotate image clockwise

-scale
    Deprecated alias for resize

-sharpen
    Sharpen with radius and sigma

-strip
    Remove all image profiles and comments

-trim
    Trim edges to content

convert.im6 is the ImageMagick 6 utility for converting and manipulating raster images from the command line.

It supports over 200 image formats including JPEG, PNG, GIF, TIFF, PDF, and more. Users can resize, crop, rotate, apply filters, adjust colors, add text, and perform batch operations.

Ideal for automation in scripts, web processing, or thumbnails. Unlike the newer magick command in ImageMagick 7, convert.im6 is specifically for version 6 installations, often symlinked or renamed to avoid conflicts with Windows or other Unix convert tools.

Key strengths include geometry-based operations (e.g., -resize 50%), colorspace transformations, and metadata handling. Output defaults to the extension-specified format if omitted.

Deprecated in modern setups but widely used in legacy systems and distributions like older Ubuntu/Debian.

Deprecated in ImageMagick 7 (use magick); potential name conflict with other convert commands; resource limits may cause failures on large images without tuning.

convert.im6 rose.jpg -resize 50% thumb.jpg
convert.im6 input.png -quality 85 output.jpg
convert.im6 *.png +append result.png

Use with shell: for f in *.jpg; do convert.im6 "$f" -resize 1024x thumb_"$f"; done
Supports multiple inputs with operators like -append, -mosaic.

Developed as part of ImageMagick 6 (2002-2018) by ImageMagick Studio LLC. Renamed to convert.im6 in some distros (e.g., Ubuntu 18.04+) to avoid clashing with Windows convert.exe or other tools. Superseded by unified magick CLI in v7 (2017+).

magick(1), identify(1), mogrify(1), display(1), montage(1)