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From kjgarza-base
Process images using ImageMagick for format conversion, resizing, cropping, batch processing, effects, composition, watermarks, and optimization. This skill should be used when the user wants to convert image formats (PNG, JPEG, WebP, GIF), resize or crop images, apply effects (blur, sharpen, sepia, grayscale), add watermarks or text overlays, batch process multiple images, create thumbnails, or optimize images for web.
npx claudepluginhub kjgarza/marketplace-claude --plugin kjgarza-baseHow this skill is triggered — by the user, by Claude, or both
Slash command
/kjgarza-base:image-processingThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Process images using ImageMagick command-line tools for conversion, optimization, and manipulation tasks.
Convert and manipulate images using ImageMagick: format conversion, resizing, batch processing, thumbnails, quality adjustment, rotate, flip, crop.
Processes web images: resize, crop, trim whitespace, convert PNG/WebP/JPG, optimize size, generate thumbnails/OG cards via Python Pillow CLI or scripts.
Compresses images to WebP (default) or PNG using automatic tool selection (sips, cwebp, ImageMagick, Sharp). Supports batch, recursive, quality, and keep-original options.
Share bugs, ideas, or general feedback.
Process images using ImageMagick command-line tools for conversion, optimization, and manipulation tasks.
brew install imagemagick
sudo apt-get install imagemagick
winget install ImageMagick.ImageMagick
# Or download: https://imagemagick.org/script/download.php
magick -version
# or
convert -version
# Convert format
magick input.png output.jpg
# Resize maintaining aspect ratio
magick input.jpg -resize 800x600 output.jpg
# Create square thumbnail
magick input.jpg -resize 200x200^ -gravity center -extent 200x200 thumb.jpg
# Resize all JPEGs to 800px width
mogrify -resize 800x -quality 85 *.jpg
# Output to separate directory
mogrify -path ./output -resize 800x600 *.jpg
# Add watermark to corner
magick input.jpg watermark.png -gravity southeast \
-geometry +10+10 -composite output.jpg
# Generate multiple sizes
for size in 320 640 1024 1920; do
magick input.jpg -resize ${size}x -quality 85 "output-${size}w.jpg"
done
# Convert PNG to optimized JPEG
mogrify -path ./optimized -format jpg -quality 85 -strip *.png
# Gaussian blur
magick input.jpg -gaussian-blur 0x8 output.jpg
# Resize, crop, border, adjust
magick input.jpg \
-resize 1000x1000^ \
-gravity center \
-crop 1000x1000+0+0 +repage \
-bordercolor black -border 5x5 \
-brightness-contrast 5x10 \
-quality 90 \
output.jpg
# Create with delay
magick -delay 100 -loop 0 frame*.png animated.gif
# Optimize size
magick animated.gif -fuzz 5% -layers Optimize optimized.gif
# Basic info
identify image.jpg
# Detailed format
identify -verbose image.jpg
# Custom format
identify -format "%f: %wx%h %b\n" image.jpg
-strip-interlace PlaneDetailed guides in references/:
800x600 - Fit within (maintains aspect)800x600! - Force exact size800x600^ - Fill (may crop)800x - Width onlyx600 - Height only50% - Scale percentageImageMagick "not authorized"
# Edit policy file
sudo nano /etc/ImageMagick-7/policy.xml
# Change <policy domain="coder" rights="none" pattern="PDF" />
# to <policy domain="coder" rights="read|write" pattern="PDF" />
Memory errors
# Limit memory usage
magick -limit memory 2GB -limit map 4GB input.jpg output.jpg