FastStone Image Viewer
6.8#4 in file viewer software$34.95 one-timeFree planWindows
VisitFastStone Image Viewer vs SumatraPDF
SumatraPDF
6.3#8 in file viewer softwareFree planFree planWindows
VisitWhat both publish
| Fact | FastStone Image Viewer | SumatraPDF |
|---|---|---|
| Formats | It supports major graphic formats and popular camera RAW formats, including HEIC, WEBP, PDF, SVG, and JPEG XL. | It supports PDF, EPUB, MOBI, CBZ, CBR, DjVu, XPS, CHM, and common image formats. |
| Free plan | Yes | Yes |
| Portable use | A portable version can run from removable storage. | A portable version can run without installation, including from a USB drive. |
| Support | FastStone lists technical support by email at [email protected]. | Users can report bugs through the issue tracker and ask questions or share feedback in the forum. |
FastStone Image Viewer plans
- Personal and educational—
- Commercial lifetime license$34.95, paid once
- FastStone Image Viewer (personal and educational use)Free
- FastStone Image Viewer (commercial license)$34.95, paid once
SumatraPDF plans
- FreeFree
Pick FastStone Image Viewer if…
FastStone Image Viewer may suit Windows users who need to browse, edit, compare, or batch-process images, including camera RAW formats. It may also fit users who want scanner support or a portable version for removable storage.
Pick SumatraPDF if…
SumatraPDF suits Windows users who want a free reader for documents, ebooks, or comics, including readers who need text-to-speech or keyboard-only use. Its portable version may suit people who want to run it without installation.