Batch image processors are often underrated and don’t get the attention they deserve. But this type of software is worth getting familiar with. With batch image processing, a user can select a size or file type, and then convert all the selected images.
This way, hundreds or thousands of images can be processed with just a few clicks. Unfortunately, there are not that many tools that do batch conversion really well. But these five tools save loads of time and effort.
If you deal with writing content on the web, you are likely to need to process images, and face the pain of converting many images to different sizes and formats. The best batch image processors do lots more than resize and convert images. They also offer some advanced functions including graphics editing.
Here’s our verdict captured in a legendary LinuxLinks-style ratings chart. All of the software featured here is free and open source goodness.

| Batch Image Processors | |
|---|---|
| ImageMagick | Create, edit, and compose bitmap images. Extremely versatile software |
| XL Converter | Easy-to-use image converter for modern formats |
| imgp | Multi-core batch image file resize and rotate |
| GraphicsMagick | Swiss army knife of image processing |
| FotoKilof | GUI for ImageMagick |
| Caesium | Image compression software |
| Converseen | Qt-based open source batch image converter and resizer |
| Switcheroo | Utility to convert and manipulate images |
| PixelBatch | Batch image optimization tool |
| Imagine Plus | Image optimisation utility for compressing, converting and resizing images |
| Image Normalizer | Batch-processing tool that resizes and compresses images |
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