Radical Image Optimization Tool (RIOT for short) is a free image optimizer that will let you to visually adjust compression parameters while keeping minimum filesize. It uses with a side by side (dual view) or single view interface to compare the original with the optimized image in real time and instantly see the resulting file size.

Changelog:
+ added Help file (not yet complete)
+ DLL version: added flags for all JPEG chroma settings
* DLL version: the default chroma for RIOT_SaveToFile is now "medium" instead of "low"
* Batch mode: fixed a bug when using a bat file as external PNG optimizer and @echo off is not on the first line.
This problem does not occur in normal mode.
* DLL version: fixed some sliders going nuts when pressed during tooltip display
* fixed preview executed twice when asked to resample big images
* Batch settings "Keep original date/time" and "Report file size changes" are now remembered at startup
* if "Report file size changes" is checked and the selected external optimizer is not installed the reported size is -100% or ~ -99.9%. Fixed !
* fixed error running same batch twice with external optimizer and "Keep original date/time is checked
* file is now set as modified only if OptimizePNG is successfully executed
* fixed related issues reported in the RIOT forum, with the external PNG optimizer implementation
* fixed a memory leak in FileIsWritetable
! avoid some file locking problems

Program Information Category: Multimedia Type: Free Version: 0.4.6 Size: 1.15MB Works on: Windows Product page: here