XnView MP is a versatile and powerful photo viewer, image management, image resizer and image converter.
XnView is one of the most stable, easy-to-use, and comprehensive photo editors.
All common picture and graphics formats are supported (JPEG, TIFF, PNG, GIF, WEBP, PSD, JPEG2000, OpenEXR, camera RAW, HEIC, PDF, DNG, CR2)
Its features include slideshow, contact sheets, image compare, batch rename, screen capture, batch conversion and image processing...

Unrivalled Digital Asset Management
XnView has file management capabilities (finding, sorting, moving, organizing). Add ratings, hierarchical keywords, tags, categories, and color labels.