Skip to content

FastStone Image Viewer vs OPNsense

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

FastStone Image Viewer icon
FastStone Image Viewer
OPNsense icon
OPNsense

FastStone Image Viewer vs OPNsense: 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.

OPNsense: OPNsense is an open source firewall and routing software based on FreeBSD. It features a stateful packet filtering firewall, traffic shaping, VPN capabilities, intrusion detection and prevention, and centralized logging and reporting.

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 OPNsense
Sugggest Score
Category Photos & Graphics Network & Admin
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

OPNsense
OPNsense

Description: OPNsense is an open source firewall and routing software based on FreeBSD. It features a stateful packet filtering firewall, traffic shaping, VPN capabilities, intrusion detection and prevention, and centralized logging and reporting.

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
OPNsense
OPNsense Features
  • Stateful packet filtering firewall
  • Traffic shaping and QoS
  • VPN capabilities (IPsec, OpenVPN, L2TP)
  • Intrusion detection and prevention
  • Centralized logging and reporting
  • Web interface for configuration and management
  • Plugin architecture for extensibility
  • High availability with CARP protocol
  • Captive portal for guest networks
  • Traffic analysis and monitoring

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
OPNsense
OPNsense

Pros

  • Free and open source
  • Regular updates and security fixes
  • Extensive documentation and community support
  • Highly customizable via plugins
  • Supports latest network standards and protocols
  • Performs well even on low-end hardware

Cons

  • Steeper learning curve than commercial solutions
  • Lacks some features found in proprietary alternatives
  • Requires more hands-on management than UTM appliances
  • Plugin quality can vary

Pricing Comparison

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

Ready to Make Your Decision?

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