imagemagick

suite of tools for image manipulation

TLDR

Convert image format (v7 syntax)

$ magick [input.png] [output.jpg]

Resize image

$ magick [input.jpg] -resize [800x600] [output.jpg]

Create thumbnail

$ magick [input.jpg] -thumbnail [150x150^] -gravity center -extent [150x150] [thumb.jpg]

Add text watermark

$ magick [input.jpg] -gravity south -annotate +0+10 "[Copyright]" [output.jpg]

Combine images horizontally

$ magick [a.jpg] [b.jpg] +append [combined.jpg]

Create GIF from images

$ magick -delay [100] [*.png] [animation.gif]

Identify image info

$ magick identify [image.jpg]

Batch convert all PNGs to JPEGs in the current directory

$ magick mogrify -format jpg [*.png]

SYNOPSIS

magick [input] [operations] outputmagick identify [options] imagemagick mogrify [options] images

ImageMagick is a suite of tools for image manipulation. It can convert, resize, crop, rotate, combine, and apply effects to images in over 200 formats.Key tools: magick (transform, replaces convert in v7), identify (info), mogrify (in-place edit), composite (combine), montage (collage). In v7, all subcommands are invoked via `magick` (e.g., `magick identify`, `magick mogrify`).

PARAMETERS

-resize geometry

Resize image.

-crop geometry

Crop image.

-rotate degrees

Rotate image.

-quality value

Compression quality (JPEG: 1-100, PNG: 0-9 for zlib compression level).

-gravity type

Anchor point for operations.

-annotate geometry text

Add text annotation.

-blur radius

Apply blur.

-sharpen radius

Sharpen image.

-colorspace type

Convert colorspace.

-density value

Set resolution (DPI).

-strip

Remove all metadata and profiles from image.

-format type

Set the output image format.

CAVEATS

Memory-intensive for large images. The default security policy (policy.xml) may restrict some operations and file formats. In v7, the `convert` command is deprecated in favor of `magick`; legacy v6 syntax still works but emits warnings.

HISTORY

ImageMagick was created by John Cristy in 1987 at DuPont. It's been continuously developed and remains the most widely used command-line image processing toolkit.