Microsoft Powershell Tips & Tricks Windows 10

How to Convert WebP to JPG in Bulk Using PowerShell

Muhammad FaizanMarch 14, 2024 - Last Updated: March 22, 2024

0 1,012 2 minutes read

Table of Contents

Introduction

WebP is a modern image format developed by Google that offers superior compression compared to traditional JPGs and PNGs. This results in smaller files, helping websites load faster. However, not all image editing software and devices fully support WebP yet. If you need to use your images with older tools or platforms, converting them to the universally-supported JPG format might be necessary. Here’s how to automate this process with PowerShell.

Prerequisites

Windows PowerShell: This guide assumes you’re on a Windows system.
WebP Encoder (cwebp.exe): Download the WebP command-line utilities from Google Developers (https://developers.google.com/speed/webp/download). You’ll need the cwebp.exe file.
WebP Images: A collection of WebP files you want to convert.

PowerShell Script

# Specify the folder containing your WebP files
$webpFolder = "C:\Your\WebP\Folder\Path"

# Path to the cwebp.exe file (modify if needed)
$cwebpPath = "C:\Path\To\Your\cwebp.exe"

# Get all WebP files in the folder
$webps = Get-ChildItem -Path $webpFolder -Filter "*.webp"

foreach ($webp in $webps) {
    # Create output JPG filename
    $jpgFileName = $webp.BaseName + ".jpg"
    $jpgFilePath = Join-Path $webpFolder $jpgFileName

    # Construct the command to run cwebp
    $command = "& '{0}' '{1}' -o '{2}'" -f $cwebpPath, $webp.FullName, $jpgFilePath

    # Execute the conversion command
    Invoke-Expression $command
}

Explanation

Setting Folders: Replace placeholders with the path to your WebP folder and the location of your cwebp.exe file.
Retrieving WebP Files: The code finds all .webp files in the specified folder.
Generating JPG Names: The script creates an output JPG filename with the same base name as the input WebP file.
Constructing the cwebp Command: The script builds the command to execute the cwebp.exe utility to perform the conversion.
Executing the Command: The Invoke-Expression command runs the cwebp command, converting each WebP to JPG.

How to Run the Script

Download cwebp.exe: Get it from Google Developers and place it in a convenient location.
Open PowerShell: Find it in your Windows Start menu.
Paste the Code: Paste the code into the PowerShell window.
Modify Paths: Ensure the paths to your WebP folder and cwebp.exe are correct.
Execute: Press Enter to run the script.

Additional Tips

Transparency: If you need to convert WebP images to JPG while preserving transparency, consider using PNG format instead. PNG offers both transparency and a wide color range.

More Image Conversions with PowerShell

Interested in automating other image conversion tasks? Check out these related guides:

Let me know if you have other image formats you’d like assistance converting with PowerShell!