Skip to content

PngOptimizer vs Preview

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

PngOptimizer icon
PngOptimizer
Preview icon
Preview

PngOptimizer vs Preview: The Verdict

⚡ Summary:

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

Preview: Preview is a free and open-source document viewer application for macOS. It allows quick viewing of multiple file formats including images, PDFs, Markdown files, Office documents, and more. Preview has basic editing capabilities and annotation tools for PDFs.

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 PngOptimizer Preview
Sugggest Score — —
Category Photos & Graphics Office & Productivity
Pricing Open Source Open Source

Product Overview

PngOptimizer
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

Preview
Preview

Description: Preview is a free and open-source document viewer application for macOS. It allows quick viewing of multiple file formats including images, PDFs, Markdown files, Office documents, and more. Preview has basic editing capabilities and annotation tools for PDFs.

Type: software

Pricing: Open Source

Key Features Comparison

PngOptimizer
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
Preview
Preview Features
  • View PDFs, images, text files and more
  • Annotate PDFs with shapes, text boxes, signatures
  • Basic image editing tools
  • Fill out and sign PDF forms
  • Combine PDFs and export as PDF or other formats
  • Tabbed interface to view multiple files
  • Quick Look support to preview files
  • Built-in screen capture tool

Pros & Cons Analysis

PngOptimizer
PngOptimizer
Pros
  • Free and open source
  • Simple and easy to use
  • Effective compression to reduce file sizes
  • Cross-platform compatibility
  • Preserves image quality
  • Fast batch processing
  • Actively developed and maintained
Cons
  • Limited to PNG file format only
  • No advanced editing features
  • Compression results can vary
  • GUI is basic and minimal
  • Requires technical knowledge to use CLI
Preview
Preview
Pros
  • Free and included with macOS
  • Fast and lightweight
  • Supports many common file formats
  • Useful annotation and editing tools
  • Easy to use interface
Cons
  • Limited functionality compared to paid alternatives
  • Lacks advanced PDF editing features
  • No OCR for scanning text in images
  • No collaboration tools

Pricing Comparison

PngOptimizer
PngOptimizer
  • Open Source
Preview
Preview
  • Open Source

Related Comparisons

FastStone Image Viewer
vs PngOptimizer vs Preview
Caesium Image Compressor
vs PngOptimizer vs Preview

Learn More About Each Product

PngOptimizer
PngOptimizer
Reviews, pricing & alternatives →
Preview
Preview
Reviews, pricing & alternatives →

Ready to Make Your Decision?

Explore more software comparisons and find the perfect solution for your needs

PngOptimizer Alternatives
Preview Alternatives
Browse More Software