| 1 |  ImageGlassA lightweight, versatile image viewer | 10.0.906.0 | Open source | September 5, 2026 | — | 978.6K ↓ |
| 2 |  WeasisWeasis is a DICOM viewer available as a desktop application or as a web-based application. | 4.7.3 | Open source | August 25, 2026 | — | 482.7K ↓ |
| 3 |  QuickLookBring macOS “Quick Look” feature to Windows | 4.5.0 | Open source | April 26, 2026 | — | 84.8K ↓ |
| 4 |  MSBuild Structured Log ViewerA logger that can be passed to MSBuild to record a detailed log file and a WPF viewer app to view the log files in a tree form. | 2.3.150 | Open source | March 30, 2026 | — | 56.7K ↓ |
| 5 |  LogExpertWindows tail program and log file analyzer. | 1.50.0 | Open source | October 22, 2026 | — | 52.3K ↓ |
| 6 |  JPEGViewFork of JPEGView by David Kleiner - fast and highly configurable viewer/editor for images with a minimal GUI. Basic on-the-fly image processing is provided. | 1.3.46.0 | Open source | January 31, 2024 | — | 47.8K ↓ |
| 7 |  PicView100% free and open source picture viewer | 5.1.4 | Open source | September 28, 2026 | — | 3.5K ↓ |
| 8 |  DevDocsA full-featured desktop app for DevDocs.io. | 0.7.2 | Open source | May 22, 2021 | — | 5.4K ↓ |
| 9 |  Belgium e-ID viewerAccess your eID card data. | 5.1.6342 | Proprietary | July 28, 2026 | — | 1.3M ↓ |
| 10 |  qimgvImage viewer. Fast, easy to use. Optional video support. | 1.0.2 | Open source | October 14, 2021 | — | 3.1K ↓ |
| 11 |  PDF-XChange ViewerPDF-XChange Viewer is a small and fast PDF reader for Microsoft Windows XP and above. | 2.5.322.10 | Free | August 26, 2022 | 35.8 MB | 68.4K ↓ |
| 12 |  iNFekt NFO ViewerThe ultimate best NFO viewer, ever! | 1.3.0 | Open source | September 25, 2023 | — | 2.8K ↓ |
| 13 |  ImagineImagine Freeware Image & Animation Viewer for Windows | 2.7.2 | Free | October 10, 2026 | — | 2.4K ↓ |
| 14 |  Microsoft Visio Viewer 2016Microsoft Visio 2016 Viewer allows anyone to view Visio drawings inside their Microsoft Internet Explorer Web browser. | 16.0.4339.1001 | Proprietary | June 8, 2021 | 24.1 MB | 113.6K ↓ |
| 15 |  Thumbs ViewerThumbs Viewer - Extract Windows Thumbs.db database files. | 1.0.3.1 | Open source | June 20, 2024 | — | 1.3K ↓ |
| 16 |  HoneyviewA fast, powerful, and free image viewer. | 5.53 | Free | October 9, 2024 | — | 72K ↓ |
| 17 | WwindjviewA fast, compact, and powerful DjVu viewer | 2.1 | Open source | | — | 69.1K ↓ |
| 18 |  GlyphCross-platform markdown viewer | 0.27.0 | Open source | October 24, 2026 | — | 861 ↓ |
| 19 |  RadiAnt DICOM ViewerA PACS DICOM viewer for medical images designed to provide you with a unique experience. | 2026.1 | Proprietary | July 30, 2026 | 8.2 MB | 18.8K ↓ |
| 20 |  SageThumbsA powerful shell extension allowing to preview enormous amount of image formats directly in Windows Explorer. | 2.0.0.23 | Open source | June 24, 2021 | 2.2 MB | 14.6K ↓ |
| 21 |  Last Activity ViewA tool for displays a log of actions/activity made by the user and events occurred on this computer. | 1.37 | Free | January 14, 2025 | 90 KB | 14.1K ↓ |
| 22 |  QubaQuba is a viewer for electronic invoices | 1.5.1 | Open source | May 6, 2026 | — | 113 ↓ |
| 23 |  ChromeCacheViewCache viewer for Google Chrome Web browser. | 2.52 | Free | February 3, 2025 | 262 KB | 8.1K ↓ |
| 24 | NNFOPadSmall, fast and flexible text editor and nfo viewer. | 1.81 | Free | May 27, 2026 | 1.5 MB | 7.8K ↓ |
| 25 | QquickviewerAn image/comic viewer | 1.2.8 | Open source | | — | 7.1K ↓ |
| 26 | BbabelmapUnicode Character Map for Windows | 16.0.0.6 | Free | | 7.1 MB | 6.1K ↓ |
| 27 |  EPS ViewerA free tool to open, view and convert EPS (Encapsulated PostScript) graphics files. | 3.2.0.0 | Free | February 5, 2026 | 8.9 MB | 3.2K ↓ |
| 28 |  ImageGlass (MSI)A lightweight, versatile image viewer | 10.0.6.906 | Open source | October 15, 2026 | — | ★ 14.7K |
| 29 |  IconViewerIconViewer is a free Windows Explorer extension that lets you easily view, copy, and save icons contained within programs and libraries. Open a file's Properties box, select the "Icons" tab, and view the icons contained in the file. | 3.2.147 | Other licence | March 7, 2022 | 1.0 MB | 1.9K ↓ |
| 30 |  nomacs - Image Lounge (Beta)nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images. | 3.23.3 | Open source | July 21, 2026 | — | ★ 3.3K |
| 31 |  qViewAn image viewer designed with minimalism and usability in mind. | 7.1 | Open source | August 8, 2025 | — | ★ 3.7K |
| 32 |  nomacs - Image Loungenomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images. | 3.22.4 | Open source | October 2, 2026 | — | ★ 3.3K |
| 33 |  LeafViewA minimalist image viewer based on Leaflet.js and Electron. | 4.5.1 | Open source | October 25, 2026 | — | ★ 362 |
| 34 |  qView NightlyqView is an image viewer designed with minimalism and usability in mind. | 2025.10.11.1 | Open source | November 7, 2025 | — | ★ 3.7K |
| 35 |  NeeViewAn image viewer that allows you to browse images in folders and compressed files like a book. Powerful customization is available. | 46.3 | Open source | August 9, 2026 | — | ★ 1.1K |
| 36 | Qqimgv-videoFast, configurable and easy to use image viewer with video support | 1.0.2 | Open source | | — | ★ 3.2K |
| 37 |  Tree Data ExplorerViewer/Explorer for XML, YAML and JSON | 1.4 | Free | December 15, 2025 | 26.6 MB | 486 ↓ |
| 38 |  JarkViewerA simple image viewer. | 1.34 | Open source | August 17, 2026 | — | ★ 1.3K |
| 39 |  void Image ViewerLightweight image viewer for Windows with animated GIF/WEBP support | 1.0.0.13 | Free | September 3, 2025 | 272 KB | ★ 2.5K |
| 40 |  mcata powerfull extended cat command, to cat all the things you couldn't before | 0.4.6 | Open source | November 17, 2025 | — | ★ 1.4K |
| 41 |  DatasetViewerA modern, high-performance dataset viewer built with Tauri, React, and TypeScript. Designed to handle massive datasets from multiple sources with efficient streaming for large files (100GB+) and lightning-fast search capabilities. | 1.6.4 | Free | October 19, 2025 | — | ★ 1.1K |
| 42 |  Quick Picture ViewerLightweight, versatile desktop image viewer for Windows. The best replacement for the default Windows photo viewer. | 3.1.4 | Open source | May 15, 2021 | — | ★ 836 |
| 43 |  QuickViewA blazingly fast, lightweight image viewer for Windows powered by Direct2D and SIMD. | 6.40.1.1 | Open source | October 7, 2026 | — | ★ 623 |
| 44 |  ImagotA fast, lightweight image viewer built with Godot. | 0.2.18 | Open source | August 18, 2026 | — | 52 ↓ |
| 45 |  TintaFast, lightweight markdown and Mermaid viewer for Windows | 3.7.4 | Open source | September 22, 2026 | — | ★ 235 |
| 46 |  Nexa Markdown ViewerNexa Markdown Viewer — GitHub 스타일 크로스플랫폼 Markdown 뷰어 (by SosomLab, Tauri+React) | 0.4.0 | Open source | October 9, 2026 | — | 110 ↓ |
| 47 | AACDSee FreeACDSee Free is a fast and powerful file browser, ideal for viewing RAW images, as well as searching and sorting your media libraries. | 2.5.0.1164 | Proprietary | August 5, 2025 | 388.6 MB | — |
| 48 |  LocalPDF StudioLocal-first desktop PDF studio | 0.18.0 | Open source | July 11, 2026 | — | 34 ↓ |
| 49 |  Thumbcache ViewerThumbcache Viewer - Extract Windows Vista, Windows 7, Windows 8, Windows 8.1, and Windows 10 thumbcache database files. | 1.0.4.0 | Open source | June 20, 2024 | — | ★ 172 |
| 50 |  openexr-viewerSimple viewer for OpenEXR images with detailed metadata probing. | 0.6.1 | Open source | December 11, 2023 | — | ★ 124 |