How do I install the Imagemagick CLI skill?

Run npx skillmds@latest add grandamenium/imagemagick-cli in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Imagemagick CLI safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Imagemagick CLI?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Imagemagick CLI free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Imagemagick CLI?

grandamenium (@grandamenium) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Imagemagick CLI by grandamenium — Agent Skill

Name: Imagemagick CLI
Author: grandamenium

File contents

ImageMagick

Image manipulation toolkit. Resize, crop, convert, composite, and annotate images in 200+ formats.

Official site: https://imagemagick.org
Docs: https://imagemagick.org/script/command-line-processing.php

Common Commands

Format Conversion

magick input.png output.jpg                          # PNG to JPEG
magick input.svg output.png                          # SVG to PNG
magick input.webp output.png                         # WebP to PNG
magick *.jpg output.pdf                              # Multiple images to PDF

Resize

magick input.png -resize 800x600 output.png          # Resize to fit within 800x600
magick input.png -resize 50% output.png              # Scale to 50%
magick input.png -resize 800x600! output.png         # Force exact dimensions (distort)
magick input.png -resize 800x600^ -gravity center -extent 800x600 output.png  # Fill and crop

Crop

magick input.png -crop 400x300+100+50 output.png     # Crop 400x300 at offset (100,50)
magick input.png -gravity center -crop 400x300+0+0 output.png  # Center crop
magick input.png -trim output.png                     # Auto-trim whitespace

Quality and Compression

magick input.png -quality 85 output.jpg               # JPEG quality
magick input.png -strip output.png                    # Remove metadata
magick input.png -colors 256 output.png               # Reduce colors

Annotate and Draw

magick input.png -pointsize 24 -fill white -gravity south -annotate +0+10 "Caption" output.png
magick input.png -fill red -draw "circle 100,100 150,100" output.png

Composite and Overlay

magick base.png overlay.png -gravity southeast -composite output.png
magick base.png -page +10+10 watermark.png -flatten output.png

Batch Processing

magick mogrify -resize 800x600 -path ./resized *.jpg  # Batch resize to directory
magick mogrify -format png *.jpg                       # Batch convert format

Info

magick identify input.png                              # Basic info
magick identify -verbose input.png                     # Detailed info
magick identify -format "%wx%h" input.png              # Just dimensions

Agent Best Practices

Use magick (v7) instead of convert (v6 legacy)
Use magick identify to inspect images before processing
Use magick mogrify for in-place or batch operations
Use -strip to remove EXIF data for smaller files
Use -quality 85 for JPEG - good balance of size and quality
Chain operations in a single command for efficiency
Use -gravity with -extent for precise cropping

Example Workflows

Create a thumbnail

magick input.jpg -resize 200x200^ -gravity center -extent 200x200 -quality 85 thumb.jpg

Get image dimensions

magick identify -format "%w %h" input.png

---name: imagemagick-clidescription: Use ImageMagick (magick/convert) to resize, crop, convert, annotate, and process images from the terminal.---# ImageMagickImage manipulation toolkit. Resize, crop, convert, composite, and annotate images in 200+ formats.- **Official site:** https://imagemagick.org- **Docs:** https://imagemagick.org/script/command-line-processing.php## Common Commands### Format Conversion```bashmagick input.png output.jpg # PNG to JPEGmagick input.svg output.png # SVG to PNGmagick input.webp output.png # WebP to PNGmagick *.jpg output.pdf # Multiple images to PDF```### Resize```bashmagick input.png -resize 800x600 output.png # Resize to fit within 800x600magick input.png -resize 50% output.png # Scale to 50%magick input.png -resize 800x600! output.png # Force exact dimensions (distort)magick input.png -resize 800x600^ -gravity center -extent 800x600 output.png # Fill and crop```### Crop```bashmagick input.png -crop 400x300+100+50 output.png # Crop 400x300 at offset (100,50)magick input.png -gravity center -crop 400x300+0+0 output.png # Center cropmagick input.png -trim output.png # Auto-trim whitespace```### Quality and Compression```bashmagick input.png -quality 85 output.jpg # JPEG qualitymagick input.png -strip output.png # Remove metadatamagick input.png -colors 256 output.png # Reduce colors```### Annotate and Draw```bashmagick input.png -pointsize 24 -fill white -gravity south -annotate +0+10 "Caption" output.pngmagick input.png -fill red -draw "circle 100,100 150,100" output.png```### Composite and Overlay```bashmagick base.png overlay.png -gravity southeast -composite output.pngmagick base.png -page +10+10 watermark.png -flatten output.png```### Batch Processing```bashmagick mogrify -resize 800x600 -path ./resized *.jpg # Batch resize to directorymagick mogrify -format png *.jpg # Batch convert format```### Info```bashmagick identify input.png # Basic infomagick identify -verbose input.png # Detailed infomagick identify -format "%wx%h" input.png # Just dimensions```## Agent Best Practices- Use `magick` (v7) instead of `convert` (v6 legacy)- Use `magick identify` to inspect images before processing- Use `magick mogrify` for in-place or batch operations- Use `-strip` to remove EXIF data for smaller files- Use `-quality 85` for JPEG - good balance of size and quality- Chain operations in a single command for efficiency- Use `-gravity` with `-extent` for precise cropping## Example Workflows### Create a thumbnail```bashmagick input.jpg -resize 200x200^ -gravity center -extent 200x200 -quality 85 thumb.jpg```### Get image dimensions```bashmagick identify -format "%w %h" input.png```

Frequently asked questions

Imagemagick CLI