FastStone Image Viewer vs PngOptimizer

FastStone Image Viewer

Description: FastStone Image Viewer is a free, lightweight image viewing and organizing program. It has an intuitive interface and supports a wide range of image formats like JPEG, GIF, PNG, BMP as well as raw formats from major DSLRs. Useful features include batch editing tools, screen capture, color schemes, and the ability to view images in full screen slideshows.

Type: software

PngOptimizer

Description: PngOptimizer is a free software that optimizes PNG images by losslessly compressing them to reduce file size. It works on Windows, Mac and Linux.

Type: software

Pricing: Open Source

FastStone Image Viewer Features

• Supports all major image formats (JPEG, TIFF, PNG, GIF, BMP, PCX, TGA, WMF, ICO, etc)
• Powerful image viewing features (zooming, panning, rotating, scrolling, drag-and-drop, etc)
• Many image processing tools (resize, crop, color adjustments, add text/watermark, etc)
• Batch conversion tools for converting images between formats, resizing, renaming, etc
• Screen capture tool
• Slideshow function
• Basic image editing (brightness, contrast, saturation, etc)
• Support for RAW files
• Thumbnail preview pane
• EXIF and IPTC metadata viewer

PngOptimizer Features

• Losslessly compresses PNG files to reduce file size
• Supports PNG, APNG and MNG file formats
• Works on Windows, Mac and Linux
• Has command line interface and GUI
• Preserves transparency and metadata
• Batch optimization of multiple images
• Drag and drop support
• Custom compression levels

FastStone Image Viewer

• Not listed

PngOptimizer

• Open Source