ImageMagick Usage Examples

ImageMagick is a powerful open-source tool for creating, editing, and converting images directly from the command line.
It supports hundreds of image formats and offers a wide variety of operations, including resizing, cropping, filtering, color adjustments, annotations, and more.

Whether you want to process a single image or automate transformations on large image collections, ImageMagick provides a versatile and scriptable solution.

You can download ImageMagick by using link below.

https://imagemagick.org/script/download.php

⚡ Basic Image Operations

Convert image format:

convert input.png output.jpg

Display image information:

identify input.jpg

Get detailed metadata:

identify -verbose input.jpg

Resize image to width 800px (keep aspect ratio):

convert input.jpg -resize 800x output_resized.jpg

Resize to exact dimensions (ignore aspect ratio):

convert input.jpg -resize 800x600! output_exact.jpg

Crop image (x=100, y=50, width=400, height=300):

convert input.jpg -crop 400x300+100+50 output_cropped.jpg

 

🎨 Color & Effects

Convert to grayscale:

convert input.jpg -colorspace Gray output_gray.jpg

Adjust brightness/contrast:

convert input.jpg -brightness-contrast 10x15 output_bc.jpg

Apply sepia tone:

convert input.jpg -sepia-tone 80% output_sepia.jpg

Blur image:

convert input.jpg -blur 0x8 output_blur.jpg

Sharpen image:

convert input.jpg -sharpen 0x2 output_sharpen.jpg

Negate colors (invert):

convert input.jpg -negate output_negate.jpg

 

🖋️ Text & Annotation

Add simple text:

convert input.jpg -gravity South -pointsize 36 -annotate 0 "Sample Text" output_text.jpg

Add watermark/logo:

composite -gravity southeast watermark.png input.jpg output_watermarked.jpg

Draw shapes (rectangle example):

convert input.jpg -fill none -stroke red -strokewidth 5 -draw "rectangle 50,50 200,200" output_rect.jpg

 

🗂️ Batch Processing Examples

Resize all .png images in a directory:

mogrify -resize 800x *.png

Convert all .png to .jpg:

mogrify -format jpg *.png

Add watermark to all images:

for f in *.jpg; do composite -gravity southeast watermark.png "$f" "wm_$f"; done

Convert all images to grayscale:

mogrify -colorspace Gray *.jpg

Crop all images to 400x300:

mogrify -crop 400x300+0+0 *.jpg

 

🧪 Advanced Examples

Combine multiple images into a single montage:

montage img1.jpg img2.jpg img3.jpg -tile 3x1 -geometry +10+10 montage.jpg

Create an animated GIF from images:

convert -delay 20 frame*.png -loop 0 animation.gif

Add border to an image:

convert input.jpg -bordercolor black -border 10x10 output_border.jpg

Overlay semi-transparent rectangle:

convert input.jpg -fill "rgba(255,0,0,0.25)" -draw "rectangle 50,50 200,200" output_overlay.jpg

Resize and compress images for web:

convert input.jpg -resize 1024x768 -quality 85 output_web.jpg

 

🚀 Final Notes

ImageMagick provides a comprehensive suite of tools for image manipulation, suitable for single files or automated pipelines.
It supports a huge variety of formats and operations, making it ideal for conversion, editing, filtering, and batch processing.

💡 Pro tip: Always work on copies of original images when running batch operations. Commands like mogrify overwrite files by default, so backups are recommended.

With ImageMagick, you can efficiently enhance, standardize, and automate image processing tasks across any project.