FastStone Image Viewer vs OptiPNG

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

OptiPNG

Description: OptiPNG is an open-source PNG optimizer that reduces the file size of PNG images while preserving transparency. It works by applying lossless compression and interpolation methods.

Type: software

Pricing: Free

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

OptiPNG Features

• Lossless compression of PNG images
• Removes unnecessary metadata
• Optimization of IDAT chunk ordering
• Interlacing optimization
• Color palette optimization
• Grayscale conversion
• Bit depth reduction

FastStone Image Viewer

• Not listed

OptiPNG

• Free