Batch resizing a folder of JPEGs is the fastest way to shrink multiple images simultaneously for web use, email attachments, or to save local device storage. Because process steps depend directly on the software available on your operating system, several simple, step-by-step methods exist for processing whole folders of JPEGs without needing third-party tools. Method 1: Windows 11 PowerToys (Fastest Free Option)
Microsoft provides a built-in bulk resizer via its official PowerToys utility suite.
Install PowerToys: Download and open the free Microsoft PowerToys suite and toggle on the Image Resizer tool.
Select Folder Contents: Open your JPEG folder, press Ctrl + A to select all files, right-click, and choose Resize pictures.
Choose Preset Size: Select a profile (Small, Medium, Large, or custom pixel dimensions) from the menu.
Configure Settings: Check the option to Remove original metadata if you want smaller files, or ensure Only shrink pictures is checked so smaller images are not awkwardly scaled up.
Execute Batch: Click Resize. The program automatically generates newly dimensioned files side-by-side with your originals without overwriting them. Method 2: Mac Preview App (Built-in macOS)
Mac users do not need to install extra software, as the native Preview app supports folder-level scaling.
Open All Images: Select all JPEG files inside your folder, right-click, and select Open With > Preview.
Select in Sidebar: Press Cmd + A inside the Preview sidebar to target every open image simultaneously.
Adjust Size: Click Tools in the top menu bar and select Adjust Size.
Input Constraints: Enter your target pixel width or height. Ensure Scale Proportionally is checked to maintain the aspect ratio and avoid image stretching.
Save Folder: Go to File > Save All to update the files, or Export Selected Images to direct the newly scaled JPEGs into an entirely new destination folder.
Method 3: Adobe Photoshop Image Processor (Professional Option)
If you own Adobe Creative Cloud, Photoshop contains a dedicated script designed exclusively for automated folder adjustments.
How to Reduce the Size of a JPEG Using 7 Different Methods – Indeed
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