img_optimize

img_optimize.sh

Optimize images for size while maintaining quality.

Usage

Optimize a single image:

./img_optimize.sh photo.jpg

Optimize all images in a directory:

./img_optimize.sh vacation-photos/

Optimize with custom quality:

./img_optimize.sh --quality 90 cat-meme.png

Mix files and directories:

./img_optimize.sh logo.png banner.jpg downloads/

Example Output

% ./img_optimize.sh --quality 85 sample-images/
Optimizing images with quality: 85

Processing directory: sample-images/
✓ sample-images/beach-sunset.jpg
  2MB → 456KB (saved 1MB, 76%)
✓ sample-images/cat-portrait.png
  3MB → 892KB (saved 2MB, 70%)
✓ sample-images/food-photo.webp
  1MB → 312KB (saved 780KB, 74%)

Summary:
Processed: 3 images
Total size: 6MB → 1MB
Total saved: 4MB (73%)

How It Works

The script uses ImageMagick to optimize images with lossy compression:

• Strips metadata (EXIF data, thumbnails, etc.) to reduce file size
• Applies quality compression (default: 85%)
• Creates new files with .optimized suffix (originals are preserved)
• Supports JPEG, PNG, WebP, and GIF formats

Installation

Requires ImageMagick:

# macOS
brew install imagemagick

# Linux (Debian/Ubuntu)
sudo apt-get install imagemagick

# Linux (Fedora/RHEL)
sudo dnf install ImageMagick