RIOT 0.5.2

A free program designed to efficiently optimize images for the Web
RIOT - The main window of RIOT enables users to choose the image they want to compress and preview the applied changes
  10 Screenshots
RIOT is an application that enables you to reduce the size of your images for your websites.

Since this is an ad-supported software, you should be careful when installing it. RIOT offers to download a third-party component that it is not necessary for the program to fully function.

The interface of the tool is clean and simple. You can import images by using the file browser or the "drag and drop" method (batch processing is also supported).

You have several options at your disposal, according to the file format - JPEG, GIF or PNG.

So, you can configure JPEG options (e.g. adjust quality, select the chrome subsampling, apply a grayscale filter), metadata settings (e.g. remove IPTC info and the EXIF profile) and make image adjustments (e.g. brightness, contrast, gamma).

When it comes to the GIF and PNG extensions, you can select a color reduction method, specify the value to reduce colors to, as well as select the color quantization algorithm.

In addition, you can zoom in and out of the image, switch to batch mode, rotate, flip or resample the image, switch to full screen mode, disable dual view, use external optimizers, and more.

The app requires a low-to-moderate amount of system resources and includes a well-drawn help file with hints. We haven't come across any issues during our tests.

The fact of the matter is that RIOT is an excellent tool for optimizing image files and we highly recommend it to all users.

Reviewed by , last updated on October 8th, 2013

Also available: Portable RIOT

our in-depth analysis
Editor's Review
file size:
1.7 MB
license type:
developed by:
Lucian Sabo
operating system(s):
Windows All
C: \ Multimedia \ Graphic \ Digital Photo Tools
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What's New in This Release:
  • fixed r s h l v keys prohibited in batch->output path
  • fixed filesize different single file vs batch mode if image is resized and using automatic mode.The original was analyzed instead of the resized one in batch mode.
  • fixed RIOT stops opening images after switching to batch mode and back
  • fixed scrollbar flicker
read full changelog
10 Screenshots
RIOT - RIOT comes in handy when users want to remove EXIF and ICC profiles from the current pictureRIOT - One can access the Image adjustments tab when they want to modify the brightness and the contrast levelsRIOTRIOTRIOTRIOTRIOTRIOTRIOT

Application description

The Radical Image Optimization Tool (RIOT for short) was developed to be a free image optimizer that will let you to v...

Users are advised to pay attention while installing this ad-supported application:

  • Offers to download or install software or components that the program does not require to fully function: OpenCandy

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