How to Resize All Photos in a Folder

By Dee Shneiderman

Dgital photo files are easier to share or store if they are a reduced file size.
i Ryan McVay/Digital Vision/Getty Images

Digital photo files can be more than 2 megabytes for a single picture, depending on the camera’s settings. The size of these large files can cause problems for storing, emailing or online sharing, especially when there are a number of photos to manage. You can resize an entire digital folder full of photos using either a computer’s native software or third party software. There are a number of software apps available for free on the web.

Windows Image Resizer Application

Navigate to the website. Click on the link to “Image Resizer.” The software will download to your computer. After it downloads, double-click on the file to install the software.

Use Windows Explorer to navigate to the desired folder in the “My Pictures” folder. Click on the first photo file you want resized then hold down the shift key and click on the last photo. This selects all the files between the first and last you click on. To select several but not all of the pictures click on the first then hold down the CTRL key and click on the files you want to select.

Right click on the selected files and select “Resize Pictures” from the context menu that opens. The software offers sizes small, medium, large and custom. Click the radio button beside the desired size. The custom size allows you to type in the exact size and gives you the option to select pixels, inches, millimeters and percent.

Uncheck the “Replace the originals” so you will have the possibility of reverting back to the original size pictures. Click “resize” and the software will create new files in the desired size. The filenames will be the same except for the size in parentheses.

Mac OS X Native Software Application

Navigate to the desired folder. With the cursor on the folder icon, use CMD+C to copy the folder. Use CMD+V to paste the original folder. Rename the new folder. This prevents saving over the original pictures.

Open the new folder and click on the first photo in the new folder, select “Edit” from the context menu and choose "Select All". Select “Tools” and choose "Adjust Size" from the context menu.

The software offers a variety of preset sizes or offers a “Custom” size. Select or type in your desired size, choose the type of measurement (pixels, inches) and resolution for all the images. Select “File” and “Save All.”

Softonic PixResizer Application

Navigate to the Softonic PixResizer site. Download and install the software.

Open the application. Click on the “Work with multiple files” tab at the top of the menu.

Click on “Source” to go to and select your desired folder. Click on “Destination” to select the folder where you want to save the resized photos. Click on “New Folder” to create a folder to save the resized files instead of overwriting the originals.

Move the slider to set the desired size. The app offers a variety of picture formats including jpeg, png, tiff or the same as the original. Select the desired the file format. Click on “Save Pictures.”

FastStone Photo Resizer Application

Navigate to the FastStone Photo Resizer website. Download and install the software.

Open the application and click on the “Batch Convert” tab at the top of the menu. Click the button to the right of the file and path box below the tabs and navigating to the desire folder. The application will show the contents of the folder on the left side box.

Click on “Add All” to fill the right side box with all the files to be resized. You can also select individual files from the left side box and click “Add” to put the selected files in the box to be resized.

Click on the “Output Format” drop down menu button to select the desired file format. The application offers most of the common file formats including jpg, png, or tiff. Click on the “Settings button and move the slider to adjust the quality, Click on the “Browse” button to the right of the file path box. Select the desired output folder or click “Create New Folder.”

Click on the “Advanced Options” button and select the “Resize” tab at the top of the Advanced Options menu. Click the radio button to select measurement type like “In Pixels,” “In Percent” or “Based on one side.” If you select “In Pixels,” the app offers several preset percentages or you can type the desired percentage. After you have made your selections click the “OK” button to return to the app’s main menu. Click on “Convert” to resize and save the photos.

Items you will need

  • Digital photo files

  • Internet connection


Windows XP has the Image Resizer already installed. Research social media requirements to determine the appropriate file size for a particular social media site. Experiment with several sizes to determine which size is best for the purpose for which the photos will be used. Take care to save files in a different folder than the original one.