Some operations can occasionally cause minor lags on very large image folders. 3. ImageGlass: The Modern Minimalist
It supports an astonishing number of file formats (including RAW) and offers powerful batch conversion and renaming tools.
Snappy performance, no bloatware, and highly customizable via plugins.
IrfanView is widely considered the gold standard for free Windows photo viewers due to its incredible speed and tiny footprint.
Comparing multiple photos side-by-side or performing quick edits without opening a heavy editor.
Clean UI, completely free and open-source, and supports various theme skins.