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FastStone Image Viewer vs pngquant

Professional comparison and analysis to help you choose the right software solution for your needs.

FastStone Image Viewer icon
FastStone Image Viewer
pngquant icon
pngquant

FastStone Image Viewer vs pngquant: The Verdict

⚡ Summary:

FastStone Image Viewer: 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.

pngquant: pngquant is an open source image optimization utility for lossy compression of PNG files. It reduces file sizes by converting images to a more efficient 8-bit PNG format while preserving transparency and retaining good visual quality.

Both tools serve their respective audiences. Compare the features, pricing, and user ratings above to determine which best fits your needs.

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature FastStone Image Viewer pngquant
Sugggest Score — —
Category Photos & Graphics Photos & Graphics
Pricing — Open Source

Product Overview

FastStone Image Viewer
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

pngquant
pngquant

Description: pngquant is an open source image optimization utility for lossy compression of PNG files. It reduces file sizes by converting images to a more efficient 8-bit PNG format while preserving transparency and retaining good visual quality.

Type: software

Pricing: Open Source

Key Features Comparison

FastStone Image Viewer
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
pngquant
pngquant Features
  • Lossy compression of PNG files
  • Reduces file size by converting to more efficient 8-bit PNG format
  • Preserves transparency
  • Retains good visual quality
  • Open source command-line utility

Pros & Cons Analysis

FastStone Image Viewer
FastStone Image Viewer

Pros

  • Free and open source
  • Intuitive and easy to use interface
  • Fast and lightweight
  • Supports many image formats
  • Lots of useful viewing, editing and organizing features

Cons

  • Lacks some advanced editing features of paid software
  • No cloud sync or storage features
  • No mobile app version
  • Limited batch editing capabilities compared to Lightroom
pngquant
pngquant

Pros

  • Significantly reduces PNG file sizes
  • Lossy compression is reversible
  • Simple command-line interface
  • Cross-platform
  • Free and open source

Cons

  • Lossy compression leads to some quality loss
  • Limited to optimizing PNG files only
  • No GUI available
  • Requires some technical knowledge to use

Pricing Comparison

FastStone Image Viewer
FastStone Image Viewer
  • Not listed
pngquant
pngquant
  • Open Source

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Learn More About Each Product

FastStone Image Viewer
FastStone Image Viewer
Reviews, pricing & alternatives →
pngquant
pngquant
Reviews, pricing & alternatives →

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