PowerShell/docs/convert-images2webp.md

convert-images.ps1

This PowerShell script converts images in a directory or a single image file to WebP format in parallel.

Parameters

Parameter	Description
-InputPath	The path to the input directory containing images or a single image file.
-OutputDir	The path to the directory where the converted WebP files will be saved. It will be created if it doesn't exist.
-Quality	The quality setting for the WebP conversion (0-100). Lower values mean smaller files but potentially lower quality. Defaults to 50.
-Lossless	Specifies whether to use lossless WebP compression ($true) or lossy compression ($false). Defaults to $true.
-MaxParallel	The maximum number of image conversions to run concurrently. Defaults to 10.

Description

The script takes advantage of PowerShell's parallel processing capabilities to efficiently convert multiple image files. It supports various input formats including:

• jpg/jpeg
• png
• gif
• bmp
• tiff

The converted files are saved in WebP format, which often provides superior compression while maintaining quality.

Examples

# Convert all images in a directory
./convert-images.ps1 -InputPath .\covers -OutputDir .\covers-webp -Quality 50 -Lossless $true -MaxParallel 10

# Convert a single image
./convert-images.ps1 -InputPath .\my_image.png -OutputDir .\output -Quality 80 -Lossless $false

Requirements

• PowerShell 7.0 or higher (required for ForEach-Object -Parallel)
• ImageMagick must be installed and accessible via the 'magick' command in your PATH