I needed a tool to batch resize transparent images, so I started searching around. I found ImageMagick which does the trick perfectly.
Here is a simple guide on how to (batch) convert images using ImageMagick.
Note: This is a tutorial for Windows users. (Specifically Windows 7.)
What is ImageMagick?
ImageMagick is a software tool that helps you work with images on your computer. It can do lots of things with pictures, like resizing them, changing their colors, and adding text or shapes to them. It’s handy for editing photos, creating graphics, and even converting between different image formats (like changing a picture from JPEG to PNG).
You can use ImageMagick through commands on your computer, or there are also programs with a user-friendly interface that use ImageMagick in the background. It’s like having a virtual toolbox for pictures, making it easier to edit and manipulate images for various purposes, whether it’s for websites, documents, or creative projects. ImageMagick is widely used because it’s powerful and can help you do many image-related tasks quickly and efficiently.
Batch Convert Images with ImageMagick
Step 1:
Download & install ImageMagick.
Step 2:
Right-click in your folder with the images while holding Shift. In your menu, you will see “Open command window here”.
Step 3:
To batch resize all the images in the folder, type in the following command:
convert -resize 100×100 *png filename.png
What this will do is resize all .png files in the folder and it will give them the filename you specified + 1 number. The size will be 100×100. Simply edit that data to suit your needs.
See the image above. The files called diamond_test-*.png are 100×100, the files below it are the original sizes.
To resize only one image, use the following command:
convert -resize 100×100 filename.png filename_new.png
Again, what this will do is resize your file called filename.png to 100×100 pixels and it will call it filename_new.png.
It pretty simple and very useful. Good luck!
