## Description

An image viewer that allows you to browse images in folders and compressed files like a book. Powerful customization is available.

- Supported image format (bmp, jpg, gif, tiff, png, ico, WIC image)
- Compressed file support (zip, rar, 7z, lzh, cbr, cbz, cb7, …)
- Recursive compressed file support
- PDF support
- Video play support
- Touch operation supported
- Mouse gesture supported
- Key customization, gesture setting
- Movement, rotation, scaling by dragging
- Loupe mode
- Facing mode
- Full screen mode
- Slide show
- Susie plugin support
- Image drop from web browser
- Command extension by scripts

### System Requirements

- Windows 10 64bit or higher

## About ZIP Version

Portable package.

- No installation required, just extract the Zip and run “NeeView.exe”.
- User data such as configuration files are stored in the “Profile” folder.
- Uninstallation is simply a matter of deleting the file.

> Note

> Explorer-related settings use the registry. These settings do not disappear even if the application is deleted, so please turn them off in the settings before deleting.

## Portal Site

- NeeView Portal Site

## Support Contact

Create your issue on GitHub.

- NeeView (GitHub)

Or comment on our blog.

- ヨクアルナニカ

## License

MIT License

Copyright (c) 2016-2026 Ito Mitsuhiro (nee)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

## Third-Party Licenses

### 7-Zip

DLL: 7z.dll

- Copyright (C) 1999-2018 Igor Pavlov.
- URL: 7-Zip
- License: GNU LGPL + BSD 3-clause License + unRAR restriction

### SevenZipSharp

DLL: SevenZipSharpNE.dll

- Copyright (C) Markovtsev Vadim 2009, 2010
- URL: SevenZipSharp - Home
- License: GNU LGPL
- Changed:
  - VS 2015 project: Project Page
  - RAR5 Support: Project Page

### Material design icons

ICON: ic_help_24px, etc…

- Google (C)
- URL: Google Fonts
- License: Apache License 2.0

### WPFDragAndDropSample

Code-in:

- Copyright (c) 2016 takanemu
- URL: WPFDragAndDropSample
- License: MIT License

### PDFium

DLL: pdfium.dll

- Copyright 2014 PDFium Authors. All rights reserved.
- URL: PDFium
- License: 3-Clause BSD License, Apache License 2.0

### PdfiumViewer

DLL: PdfiumViewer.dll

- Copyright (c) Pieter van Ginkel, Bluegrams
- URL: PdfiumViewer
- License: Apache License 2.0

### MagicScaler

DLL: PhotoSauce.MagicScaler.dll

- Copyright (c) 2015-2020 Clinton Ingram and Contributors
- URL: PhotoSauce (GitHub)
- License: MIT License

### .NET corefx

DLL: System.Buffers.dll, etc…

- Copyright (c) .NET Foundation and Contributors
- URL: .NET
- License: MIT License

### Icon Fonts

ICON: pushpin, etc…

- OnlineWebFonts.COM (C)
- URL: Icon Fonts
- License: CC BY 3.0

### SharpVectors

DLL: SharpVectors.*.dll

- Copyright (c) 2010 - 2018, Elinam LLC All rights reserved.
- URL: SharpVectors
- License: 3-Clause BSD License

### ProcessJobObject

Code-in:

- Copyright (c) Microsoft Corporation. All rights reserved.
- URL: VSTest
- License: MIT License

### Microsoft.Xaml.Behaviors.Wpf

DLL: Microsoft.Xaml.Behaviors.dll

- Copyright (c) 2015 Microsoft
- URL: XamlBehaviors for WPF
- License: MIT License

### Jint

DLL: Jint.dll

- Copyright (c) 2013, Sebastien Ros All rights reserved.
- URL: Jint
- License: BSD 2-Clause License

DLL: Acornima.dll

- Copyright (c) Adam Simon. All rights reserved.
- URL: Esprima .NET
- License: BSD 3-Clause License

### MetadataExtractor

DLL: MetadataExtractor.dll

- Copyright 2002-2019 Drew Noakes and contributors, 2014 Imazen LLC (initial conversion from Java to C#)
- URL: MetadataExtractor
- License: Apache License 2.0

DLL: XmpCore.dll

- Copyright (c) 2009, Adobe Systems Incorporated All rights reserved.
- Copyright 2015-2017, Yakov Danila, Nathanael Jones, Drew Noakes
- URL: xmp-core-dotnet
- License: BSD 3-Clause License

### MediaInfo

DLL: MediaInfo.dll

- Copyright (c) 2002-2023 MediaArea.net SARL. All rights reserved.
- URL: MediaInfo
- License: BSD-style license

### Vlc.DotNet

- Copyright (c) 2014 ZeBobo5
- URL: Vlc.DotNet
- License: MIT License
- Changed:
  - Custom for NeeView: Project Page

### AnimatedImage

DLL: AnimatedImage.dll, AnimatedImage.Wpf.dll

- Copyright 2019 Thomas Levesque
- URL: AnimatedImage
- URL: WPF Animated GIF
- License: Apache-2.0 license
- Copyright (c) 2020 Jose M. Piñeiro and others
- URL: WebP-wrapper-animatedWebP
- URL: WebP-wrapper
- License: MIT License

### NetBeauty 2

- Copyright (C) 2022 nulastudio
- URL: NetBeauty2
- License: MIT License

### VirtualizingWrapPanel

DLL: VirtualizingWrapPanel.dll

- Copyright (c) 2019 S. Bäumlisberger
- URL: VirtualizingWrapPanel
- License: MIT License

### libwebp

DLL: libwebp.dll, libsharpyuv.dll, libwebpdemux.dll

- Copyright (c) 2010, Google Inc. All rights reserved.
- URL: libwebp
- License: BSD 3-Clause License

### Generator.Equals

Code-in:

- Copyright 2020 Diego Frata
- URL: Generator.Equals
- License: MIT license

### .NET Community Toolkit

DLL: CommunityToolkit.Mvvm.dll

- Copyright © .NET Foundation and Contributors All rights reserved.
- URL: .NET Community Toolkit
- License: MIT License

### H.NotifyIcon

DLL: H.NotifyIcon.dll, H.NotifyIcon.Wpf.dll, H.GeneratedIcons.System.Drawing.dll

- Copyright (c) 2020 havendv
- URL: H.NotifyIcon
- License: MIT License

### kanaxs C# 拡張版 1.0.2

- Copyright (c) 2011, DOBON!
- URL: DoboWiki
- License: New BSD License

## Changelog

### 46.3

(2026-08-09)

##### Fixed

- Fixed an issue where “NowLoading” might not be displayed (#1987)
- Fixed an issue where files would fail to move to the Recycle Bin when “Show confirmation dialog when deleting files that don’t fit in the Recycle Bin” was turned off (#1986)

### 46.2

(2026-08-02)

##### Fixed

- Suppressed the OS‑level confirmation dialog when deleting files (#1977)
- Fixed an issue where unselected effect settings were not carried over from older versions (#1978)
- Fixed an issue where filename formatting was not applied when using the “Save” command (#1979)
- Fixed an issue where disabled effects were still applied during image saving and printing (#1980)

### 46.1

(2026-07-27)

##### Fixed

- Fixed an issue where the language setting was not saved (#1974)
- Fixed an issue where effect parameters were not carried over when updating the version (#1973)
- Fixed an issue where multiple items were selected when the Shift‑key shortcut was assigned to book navigation (#1971)
- Fixed an issue where color properties of effects could not be set via script (#1970)

### 46.0

(2026-07-19)

##### Effects

Enhanced effect-related features.

- Added support for Effect Profiles, allowing batch switching of all settings in the Effects panel (#689)
  - Implemented the commands “Set effect profile”, “Next effect profile”, and “Previous effect profile” (#689)
  - Book settings can now store the selected effect profile. The default is “Continue”, preserving previous behavior (#1339)
- Image effects now support multiple layers (#377)
  - Added a “+” button to add effect layers
- Added a Colorize effect, which applies color based on luminance (#1716)
- In the Levels effect, changing Black/White values now preserves the Center ratio (#1194)

##### Slideshow

Enhanced slideshow functionality. Most options are available under Settings → Slideshow.

- Added slideshow UI to the address bar and navigator panel (#882)
- Added command settings for slideshow page navigation (#716)
- Added settings for selecting end-of-book behavior during slideshow (#1934)
- Added auto-scroll settings for slideshow (#1531)
- Added option to wait for animations during slideshow (#1770)
- Added timer-reset operation settings (#1939)

##### Settings File Optimization

Reduced the size of the settings file by omitting default values.
Various save-data formats were also optimized, and some data structures may differ from previous versions.

- Omit default values from the settings file (#848)
- Separated Quick Access file storage (#1902)

##### Bookmark Tags

When a bookmark is registered inside a bookmark folder, it can now be displayed as a tag in the Bookshelf.
Items inside bookmark folders show both ★ and the tag.
Items registered directly under the root continue to show ★ only.

- Display bookmark folders as tags in bookshelf items (#1851)
- Panel settings allow toggling tag visibility per display mode
- Tag colors can be configured from the bookmark folder’s context menu → Properties
- Default tag color is defined by the theme key “Tag.Background”
- Added ability to open the corresponding bookmark folder from the bookshelf context menu

##### Full Desktop Mode

Added a Full Desktop Mode that expands across all monitors. C Note: Does not work correctly in multi-DPI multi-monitor environments.

- Added Full Desktop mode to window modes (#1848)
- Added “Toggle full desktop” command (Shift+F11)

##### Task Tray Resident Mode

Added a task-tray resident mode for faster startup.

- Implemented task-tray resident functionality (#446)
- Holding Shift while exiting the app also terminates the resident process

##### Book Menu

Expanded the Book menu.

- Added “Open book in explorer” command (#1678)
- Added “Open book in external app” command (#1678)
- Added “Cut book” and “Copy book” commands (#1678)
- Added “Copy book to folder” and “Move book to folder” commands (#1678)
- Added “Export book” command. Outputs the current book to a folder or file (#758)
- Added “Rename book” command. Renames the current book’s file (#1837)

##### Table of Contents in Page List

Added Table of Contents to the page list.
Displayed via the “Contents” button in the Page List panel.
Shows archive folder hierarchy or PDF outlines as a tree.

- Added Table of Contents to the page list (#1201)
- Added TOC support for playlist books (#655)
- Added “Open as book” to TOC tree item menu (#655)

##### Standard page navigation direction

The default book opening direction is now set at first launch or when initializing commands.
Page-navigation shortcuts are initialized based on this direction.

- Added page-direction settings to command presets (#1870)

##### Added

- System: Added option to delete only invalid thumbnail cache entries (#879)
- App Settings: Added “SoftwareRendering” flag to settings.json (#1896)
- Theme: Added item for coloring critical-action buttons red (#1904)
- Command: Added “Preset scroll” command. Scrolls to a position specified by parameters (#1277)
- Command: Added “Rewind video” and “Fast forward video” commands (#1882)
- Book: Added Sort by Type (Sort by Extension) to page sorting (#708)
- Book: Added book-page initialization mode for end-of-book navigation (#1644)
- View: Improved Movement Constraints under “View operation”.
  “Snap” keeps the view centered when possible (#1645)
- View: Added setting for initial horizontal alignment based on book opening direction
- View: Added ratio setting for initial center alignment (#1760)
- Slider: Added mouse-wheel behavior settings for page slider and filmstrip (#449)
- Bookmark: Added option to restore bookmark-folder location at startup (#1919)
- Bookshelf: Added item for moving to parent folder (#1015)
- Script: Added “@argsDescription” doc comment for script arguments (#1846)
- Script: Added multi-line support for script doc comments (#1938)

##### Changed

- System: Unified placeholder format from “$Name” to C#-style “{Name}” (#1905)
- System: When expanding archive entries, duplicate filenames are now placed in subdirectories (#1808)
- System: Playlist and bookmark link-broken flags are now saved (#1871)
- System: Added “.cbt” to standard archive extensions (#1921)
- System: Suppressed automatic syncing of book settings and panel layout settings (#1884)
- System: Book-thumbnail priority filename now uses regular expressions (#1949)
- System: Added filename format options when saving images (#1477)
- Command: “Move to folder” now updates bookmark paths and similar items (#1873)
- Command: Added toggle-mode settings to toggle-type command parameters (#1718)
- Book: When sorting pages by name, sorting is now performed per directory hierarchy (#1918)
- Book: End-of-book dialog now closes when it becomes inactive (#1860)
- Book: Applied “Static two pages” correction to the “Prev/Next x pages” command (#1191)
- Window: Added setting for activating window on file drop (#1954)
- Window: Main window is now activated when closing a subwindow (#1143)
- UI: Updated scrollbar style (#1099)
- UI: Added auto-hide setting for scrollbars (#1901)
- UI: Improved behavior of auto-hide panels and show/hide commands (#1499)
- UI: Version dialog can now be closed with ESC (#1924)
- UI: Wheel scroll amount now reflects OS settings (#1941)
- UI: Improved color picker; color button now opens edit popup (#1956)
- View: Other operations are now allowed during auto-scroll (#1910)
- View: Added “Scroll” and “Fade” options for page transitions when not in panorama mode (#1883)
- View: Removed “Scaling (horizontal slide, centered)” from mouse operations; replaced by “Snap” in Movement Constraints
- Panel: Smoothed thumbnail popup switching (#1346)
- Panel: Added icon overlay settings for thumbnail display (#1946)
- Panel: Added wrap-around support for left/right keys in thumbnail view (#1832)
- Bookshelf: Added ability to register multiple bookmarks at once (#1923)
- Bookshelf: When auto-syncing folder tree, selection is not changed if the tree already has focus (#1161)
- Bookshelf: Multiple exclusion patterns can now be stored (#1877)
- Bookshelf: Subfolder loading settings now propagate to child folders (#673)
- Bookshelf: Moved thumbnail assignment to the top of the context menu; added menu shortcuts (#1950)
- History: Added confirmation dialog when deleting history (#935)
- Navigator: Auto-rotation is now reflected in navigator thumbnails (#1641)
- Bookmark: Added “Last Updated” timestamp to bookmark folders (#1928)

##### Fixed

- System: Fixed issue where closing the settings window via the settings button did not trigger save processing (#1897)
- System: Fixed issue where settings might not update when NeeView is launched via external commands (#1915)
- System: Fixed issue where closed-book state was not saved (#1927)
- Book: Improved issue where toggling “Show first/last page alone” did not update display (#1937)
- UI: Fixed issue where system accent color could be difficult to see (#1917)
- View: Fixed incorrect behavior of 1:1 display when trimming or splitting pages
- View: Fixed blurring under certain conditions when resize filter was ON (#1911)
- View: Fixed page-movement issue in panorama mode when the reference position was not centered (#1914)
- Playlist: Fixed path-following issues (#1893)
- Playlist: Fixed issue where non-default playlists were not registered for file tracking (#1888)
- Playlist: Fixed issue where playlists could fail to update under multiple instances (#1887)
- Playlist: Fixed issue where underscores in destination playlist names were omitted in item menu (#1944)
- Script: Fixed occasional failures in long-running CopyPage() operations (#1862)

Please see here for the previous change log.