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IrfanView vs Oculante: catalog facts
IrfanView	Oculante
Freemium Free for private, educational and charitable use. A paid licence is required for…	Free Free open-source software.
Windows	Windows, macOS, Linux
Opens instantly, even on old hardware Batch conversion and renaming across whole folders	Fast viewer built in Rust Wide image format support
Windows only and closed source Commercial use needs a paid licence	Project is in maintenance mode Editing features are basic
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.