How to Batch Resize Images in Photoshop

Resizing images one at a time is tedious when you have five photos. It is agonizing when you have five hundred. Photoshop's Actions and Batch Processing features automate the task, letting you resize an entire folder of images to specific dimensions while maintaining quality and preserving the originals. The setup takes about two minutes, and then Photoshop handles the rest.

Recording the Action

Open the Actions panel (Window, then Actions). Click the folder icon to create a new set called Image Processing. Click the New Action button. Name it Resize and press Record. Photoshop is now recording every step you take.

Open any image from your source folder. Go to Image, then Image Size. Set your target dimensions. For web use, 1920 pixels on the long side at 72 PPI covers most needs. For social media thumbnails, 1080x1080 pixels works. Check Resample and set the method to Bicubic Automatic (or Bicubic Sharper for reduction). Click OK.

If you want to sharpen after resizing (recommended for web images), go to Filter, then Sharpen, then Unsharp Mask. Set Amount to 50, Radius to 0.5, and Threshold to 0. This adds a subtle sharpening pass that compensates for the softness introduced by downsampling.

Go to File, then Save As (or Export, then Save for Web for more control over file size). Choose your output format and quality settings. Close the image without saving changes to the original. Press the Stop button in the Actions panel. Your action is now recorded.

Running the Batch

Go to File, then Automate, then Batch. In the dialog, select your Resize action from the Image Processing set. Set the Source to Folder and browse to your source folder containing the images. Check Suppress File Open Options Dialogs and Suppress Color Profile Warnings to prevent Photoshop from pausing on every file.

Set the Destination to Folder and choose an output folder. This keeps your originals untouched. Under File Naming, configure how you want the output files named. The default uses the original filename, which works for most situations. Click OK, and Photoshop processes every image in the folder automatically.

Using the Image Processor Script

Photoshop also includes a built-in Image Processor that simplifies the batch process for common scenarios. Go to File, then Scripts, then Image Processor. Select the source folder. Choose whether to save as JPEG, PSD, or TIFF. Set the maximum dimensions for width and height. The Image Processor automatically fits images within those dimensions while preserving aspect ratio.

The Image Processor is faster to set up than a custom Action but offers less control. You cannot add sharpening, adjust specific export settings, or apply other effects. For straightforward resize-and-save operations, it is the fastest option available.

Tips for Better Results

Always resize to a specific pixel dimension rather than a percentage. Percentages produce inconsistent results when source images vary in size. Create separate actions for different output sizes: one for web, one for social media, one for email. Store these in the same Image Processing set for easy access.

For the best quality when reducing image size, resize in one step to the final dimension rather than gradually stepping down. Photoshop's resampling algorithms produce cleaner results in a single pass. Test your action on a few images before running it on a large batch to verify the output meets your expectations.