RIOT v0.6.0 Portable | 4.5 MB
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. The image optimizer is lightweight, fast and simple to use, yet powerful for advanced users.
open many image types including rare/scientific types
save and optimize JPEG, 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
What's New in This Release:
+ added "Auto, Original Format" mode, renamed modes
+ Batch: added option to save in original folder in order to keep folder structure
+ Batch: added option to backup originals on overwrite
* fixed behavior for using the original image if smaller only if we use an option from the batch mode
* fixed resize issues when keep aspect ratio is checked and both dimensions are provided
Links are Interchangeable - No Password - Single Extraction