Compare software

PhotoQt vs FastStone Image Viewer: catalog facts
PhotoQt	FastStone Image Viewer
Free Free and open source. The developer asks that you consider donating to humanitarian relief…	Free Free for personal use. Commercial use requires a paid licence, and the related FastStone…
Linux	Windows
More than 140 image formats, plus photo spheres, motion photos and Apple live photos Embedded and interactive maps for images with GPS data	Handles every common format including HEIC, WebP, PSD, PDF and camera raw Browser, viewer, basic editor and batch converter in one small program
Image manipulation is per-session only; it is a viewer, not an editor Some features need extension packages that not every installer includes	Free for personal use only; commercial use requires a licence Windows only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	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 21, 2026

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