N1 Viewer is a fast native Windows photo and image viewer app built for anyone who wants more control than a typical viewer offers. It combines ultra-fast browsing, true Windows Explorer order, direct GPU / iGPU selection, high-precision HDR and wide-gamut output, advanced color management, batch tag and metadata editing, and powerful local AI tools for visual and semantic search, similar image finding, auto-tagging, metadata suggestions and OCR text search — all in a customizable Modern or Classic interface and a local-first workflow designed for serious image browsing, culling, inspection, and comparison. Supported image formats: JPEG / JPG / JPE / JFIF, HEIC / HEIF / HIF, AVIF, JPEG XR / JXR / WDP, PNG, WebP, TIFF/ TIF, BMP, GIF, PSD, OpenEXR, Radiance HDR and JPEG XL RAW formats: CR2, CR3, DNG, NEF, NEF HE / HE Star, NRW, ARW, RAF, ORF, RW2, PEF, 3FR Highlights: • Fast browsing: Preview-first navigation maintains an adaptive preview runway — a dynamically preloaded set of nearby images — with persistent SSD caching and automatic full-quality loading for the current image. • AI Engine: Semantic Search, Find Similar and reference-image search, Fast and Detailed Auto Tags, AI-generated titles, descriptions and metadata suggestions, OCR text search. Runs locally with GPU, iGPU or CPU acceleration. • Duplicate Search: Find exact duplicates and near-duplicates, including visually similar copies with different filenames, formats, resolutions, or compression. • Viewing workflow: Fullscreen, Clean View, adaptive fit-to-window behavior and fast 100% inspection for detail checking. • Gallery File Explorer & Folder Tree: Browse folders and nested subfolders directly from Gallery without leaving the image workflow. • Compare & thumbnails: Quick 2-image comparison is available directly in the main viewer, while Gallery mode supports 2- and 4-image comparison. Thumbnail size can be adjusted in both Filmstrip and Gallery views. • Filmstrip, Gallery and Culling with ratings, Pick / Reject, labels and auto-advance. • Filename search, folder search, filters, Explorer-order persistence, multi-select, copy and undoable delete. • Touch / Pen gestures, Photoshop / Lightroom handoff and multi-monitor workflow support. Color Management & HDR Pipeline: • Advanced Color Mode: Extended ICC / Wide Gamut / HDR processing — Adobe RGB, Display P3 / DCI-P3, ProPhoto RGB, Rec.2020, Rec.2100 PQ / HLG, HDR10 / PQ, linear scRGB and custom embedded ICC profiles • Standard Color Mode: Fast color-managed SDR / HDR viewing with sRGB and common ICC-managed color profiles • Precision: 8 / 10 / 12 / 16-bit source handling where supported by the format and decode path, HALF / FLOAT HDR source handling, FP16 / scRGB presentation and selective FP32 processing for precision-sensitive Advanced transforms • Color metadata: ICC, CICP, PQ / HLG signaling, Rec.2100 metadata, OpenEXR chromaticities and Radiance primaries • Output: Color-managed SDR, Wide Gamut and HDR presentation through scRGB / Windows Advanced Color. OpenEXR Support for common single-part OpenEXR images with HALF / FLOAT RGB, RGBA and grayscale channels, scanline and supported tiled images, and NONE / RLE / ZIP / ZIPS / PIZ compression. EXR chromaticities are converted to linear scRGB for Wide Gamut and HDR presentation. Radiance HDR Native Radiance RGBE / XYZE decoding with raw, legacy RLE and modern RLE decoding, standard image orientations and embedded or default primaries converted to linear scRGB. JPEG XL JPEG XL support through the Microsoft JPEG XL Image Extension / WIC where available, including validated 16-bit floating-point HDR Rec.2020 / PQ decoding into the linear scRGB / FP16 presentation pipeline. • For best compatibility, we recommend installing HEIF Image Extensions, HEVC Video Extensions, JPEG XL Image Extension and Raw Image Extension from the Microsoft Store.