RIOT (Radical Image Optimization Tool) is a free image optimizer that lets you visually adjust compression parameters while maintaining a minimum file size. The software offers side-by-side and single-view modes, allowing you to compare original and optimized images in real time and monitor the output file size.
It is lightweight, fast, simple, and powerful for advanced users. You can control compression, number of colors, metadata settings, and much more, and select image format (JPG, GIF, or PNG) for your output file.
Also, you can integrate RIOT as a plug-in in well-known software such as GIMP, IrfanView, and XnView.
Main features of RIOT:
- open many image types, including rare/scientific types
- save and optimize JPEG, GIF, PNG, and Web 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 the resulting image
- in-place compare function (alternatively display the original image over the optimized image to notice small pixel changes)
- Compress files to the desired file size threshold
- fast processing
- 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).
- 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 the number of unique colors for PNG and GIF images to reduce filesize
- (Two quantization methods are available: Xiaolin Wu and NeuQuant neural net)
- resize images 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, and even higher.
- Adaptive logarithmic tone mapping algorithm (Drago) used for HDR images
Input image types
- common bitmap images as well as Adobe Photoshop PSD files
- popular HDR formats and RAW camera images
- rare/scientific types (up to 128 bpp, integer, and floating point)
RIOT – Pros & Cons
| Pros | Cons |
|---|---|
| ✓ Optimizes and compresses images while maintaining good visual quality, helping reduce file sizes for websites and digital content. | ✗ Focuses on image optimization rather than advanced photo editing, so it lacks features such as layers, retouching, and graphic design tools. |
| ✓ Supports popular image formats, including JPEG, PNG, and WebP, making it useful for a wide range of optimization tasks. | ✗ The interface appears dated compared to many modern image optimization applications. |
| ✓ Provides a real-time before-and-after preview, allowing users to compare image quality before saving. | ✗ Advanced compression settings may require experimentation to achieve the ideal balance between image quality and file size. |
| ✓ Includes batch processing to optimize multiple images at once, improving productivity for large image collections. | ✗ Supports fewer image formats than some full-featured image editors and professional graphics software. |
| ✓ Offers adjustable compression, resizing, metadata removal, and other optimization settings for greater control over output files. | ✗ Large batch optimization jobs may take longer to complete, depending on image size and the selected compression settings. |
What's New in RIOT 2024.1.0 (2024-01-23):
- fixed display of batch settings
- increased UI font size
Official Homepage – https://riot-optimizer.com
Supported Operating Systems: Windows 7, 8, 8.1, 10, 11.
Size: 2.69 MB
DOWNLOAD Installer for Windows 64-bit
