RIOT - Radical Image Optimization Tool


Portable version available: 

A portable version of this product is available from the developer.

Our rating: 

License type: 

Download file size: 

1.5 MB



Additional information: 

Also available as a plug-in for GIMP, Irfanview and other products. Input formats include bmp, cut, dds, g3, gif, ico, iff, j2k/j2c, jng, jpeg/jif/jpg/jpe, koa, lbm, mng, pbm, pct/pict/pic, pcx, pdc, pgm, png, ppm, psd, ras, sgi, tga/targa, tif/tiff, wap/wbmp/wbm, xbm, xpm.

64 Bit compatibility: 

32 bit but 64 bit compatible

Page anchor: 


Review article: 

Best Free Windows 64-bit Image View and Edit


Dual-pane comparison view; Outputs up to 32-bit color for jpeg, gif and png; Reduce colors (quantization); Compress; Transforms include rotate, flip, and resize; Adjustments include brightness, contrast, gamma and negative; Inputs from many bitmap file types; Option to keep or strip metadata.


Metadata is automatically removed on some formats.

Product type: 

Runs as a stand-alone program on a user's computer

Top Pick?: 


Download page:

Developers website: