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gThumb vs OptiPNG

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

gThumb icon
gThumb
OptiPNG icon
OptiPNG

gThumb vs OptiPNG: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature gThumb OptiPNG
Sugggest Score — —
Category Photos & Graphics Photos & Graphics
Pricing Free Free

Product Overview

gThumb
gThumb

Description: gThumb is an image viewer and organizer for Linux. It allows you to browse and manage your photos in a simple interface, view images in fullscreen, rotate and crop images, reduce red-eye, and more. gThumb supports common image formats like JPEG, PNG, GIF, and RAW.

Type: software

Pricing: Free

OptiPNG
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

Key Features Comparison

gThumb
gThumb Features
  • View images
  • Browse and manage photos
  • Simple interface
  • Fullscreen mode
  • Rotate and crop images
  • Red-eye reduction
  • Support for JPEG, PNG, GIF and RAW formats
OptiPNG
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

Pros & Cons Analysis

gThumb
gThumb
Pros
  • Free and open source
  • Lightweight and fast
  • Easy to use
  • Good set of basic image editing tools
  • Supports many common image formats
Cons
  • Limited advanced editing capabilities
  • Fewer features than some alternatives
  • Basic user interface
  • Lacks support for some RAW formats
OptiPNG
OptiPNG
Pros
  • Significantly reduces PNG file sizes
  • Lossless optimization preserves image quality
  • Open source and free
  • Works on Linux, Mac and Windows
  • Easy to use with command line interface
  • Can process multiple PNG files at once
Cons
  • Command line only, no GUI
  • Fewer features than some paid PNG optimizers
  • Slower than some alternatives
  • Requires technical knowledge to use command line
  • Not ideal for optimizing PNGs in bulk

Pricing Comparison

gThumb
gThumb
  • Free
OptiPNG
OptiPNG
  • Free

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Learn More About Each Product

gThumb
gThumb
Reviews, pricing & alternatives →
OptiPNG
OptiPNG
Reviews, pricing & alternatives →

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