RIOT 2024.1.0 | Portable

Graphics
24 January 2024, 18:26

Download Now

Radical Image Optimization Tool (RIOT for short) is a free image optimizer that will let you visually adjust compression parameters while keeping minimum file size. It uses a side by side (dual view) or single view interface to compare the original with the optimized image in real time. You will be able to control compression, number of colors, metadata settings and much more, and select image format (JPEG, GIF or PNG) for your output file. RIOT can be integrated as plugin in well-known programs like the GIMP, IrfanView and XnView.

Features

open many image types including rare/scientific types
save and optimize JPEG, WEBP, GIF and PNG with a simple, clean user interface
automatic optimization selects the most suitable format and parameters
works in dual view: (original – optimized image) or single view (optimized image).
automatic preview of resulting image
in-place compare function (alternativelly display the original image over the optimized image to notice small pixel changes)
compress files to desired filesize threshold
fast processing (all is done in memory);
see instant results including resulting filesize
batch support (process multiple files at once)
transparency handling options
decide if you want to keep metadata (comments, IPTC, Adobe XMP, EXIF profiles, ICC profiles).
Unsupported metadata is removed
transfer metadata between image formats (destination format must support them)
common tools: pan and zoom, rotate, flip
basic image adjustments: brightness, contrast, gamma, invert
visually reduce number of unique colors for PNG and GIF images in order to reduce filesize
(two quantization methods are available: Xiaolin Wu and NeuQuant neural net)
resize image by using well known resample filters (ex: Lanczos3, Catmull Rom, Bicubic, and others)
out-of-the-box support for external PNG optimizers (optipng, pngout, etc)
the compression and the results are comparable to those of commercial products, even higher.
Adaptive logarithmic tone mapping algorithm (Drago) used for HDR images