Download RIOT

RIOT (Radical Image Optimization Tool) is a fast and powerful tool allowing you to save and optimize JPEG, GIF, and PNG with a simple, clean user interface. The free image optimizer can visually adjust compression parameters.

RIOT has an easy to use interface to compare the original with the optimized image in real time and instantly see the resulting file size. Moreover, there is also an option to compress files to desired filesize threshold. The program will automatically select the proper settings.

RIOT on Windows 10, 24bit JPEG

This feature-rich image processor is processing all operations in memory. You can open many image types including rare/scientific types, see instant results including resulting filesize, use common tools like pan and zoom, rotate, flip, and basic image adjustments including brightness, contrast, gamma, and invert.

There is also support for metadata. You can decide if you want to keep metadata (comments, IPTC, Adobe XMP, EXIF profiles, ICC profiles), or delete them for smaller file size. Unsupported metadata is removed. Batch support allows you to process multiple image files at once.

Radical Image Optimization Tool can also resize an image by using well known resample filters (ex: Lanczos3, Catmull Rom, Bicubic, and others), and offers support for external PNG optimization tools like optipng, pngout, etc.

Radical Image Optimization Tool

The image optimization tool's automatic optimization will select the most suitable format and parameters. You can also change all setting in manual mode. All results are automatically previewed in the app window, thx to the dual view: (original – optimized image) or single view (optimized image). There is also support for adaptive logarithmic tone mapping algorithm (Drago) used for HDR images.

Activate the in-place compare function to display the original image over the optimized image to notice small pixel changes. Transfer metadata between image formats (destination format must support them), and visually reduce the number of unique colors for PNG and GIF images in order to reduce file size.