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PicView vs FastStone Image Viewer: catalog facts
PicView	FastStone Image Viewer
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free for personal use. Commercial use requires a paid licence, and the related FastStone…
Windows, macOS	Windows
It opens almost every image format including animated WebP and GIF, SVG, AVIF, HEIC, PSD and comic book…	Handles every common format including HEIC, WebP, PSD, PDF and camera raw Browser, viewer, basic editor and batch converter in one small program
It is a viewer with light editing only, and there is no Linux build.	Free for personal use only; commercial use requires a licence Windows only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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