2015 - Xnview Review
You could adjust colors, levels, and apply red-eye reduction, but all were destructive (saved over the original or created a new file). No history panel, no adjustment layers. For serious edits, you still launched Photoshop or GIMP.
The portable version ran perfectly off a USB 2.0 stick. Memory usage rarely exceeded 50MB even with large directories. Weaknesses & Frustrations (2015 Perspective) 1. The Interface Aged Poorly Even in 2015, XnView looked like a Windows 2000 application. Icons were small, gray, and unintuitive. New users would struggle to find "Lossless Crop" or "JPG Rotation" buried in menus. The dual-pane browser (tree + thumbnails) was functional but ugly. xnview review 2015
While it supported RAW, decoding a 24MP Canon CR2 file took ~4-5 seconds on a 2015 mid-range PC, and the preview quality was mediocre (lots of noise, poor highlight recovery). Lightroom was far superior, but also $10/month. You could adjust colors, levels, and apply red-eye
Unlike Picasa (which scanned everything into a massive SQLite DB) or Windows Live Photo Gallery, XnView worked on a browser-based system. You navigated folders, it cached thumbnails ( .db files), but never forced you to "import" anything. This made it ideal for external drives and network shares. The portable version ran perfectly off a USB 2
The batch convert dialog was a beast. You could resize, add watermarks, change color depth, apply filters (sharpen, blur, emboss), and rename with regex-like patterns—all in one queue. No other free tool in 2015 offered this much control without a script.
By 2015, Picasa had excellent face recognition and Google Maps integration. XnView had none of that. Its "category" tagging was manual and clunky.