ImageGlass for PC: Download & Install on Windows (2026)

The built-in Windows photo app is slow to open and fussy about formats. This imageglass download for pc guide covers the free image viewer many users switch to instead: a lightweight photo viewer that opens instantly, handles more than 80 image formats, and stays out of your way while you browse.

This guide covers the official download, the install steps, and how to set ImageGlass as your default photo viewer. It also explains the current Classic versus Pro situation honestly, so you know exactly what is free before you download.

What Is ImageGlass?

ImageGlass is a free, open-source image viewer for Windows, developed by Duong Dieu Phap and contributors since 2012. It was built to be the opposite of bloated photo suites: it opens fast, renders images cleanly, and supports an unusually wide range of formats out of the box — JPG, PNG, GIF, SVG, WebP, AVIF, HEIC and RAW camera files among them.

Everyday viewing is where it shines. Folder browsing, zooming, rotating, slideshow playback and quick format conversion all happen in a clean interface with themes you can restyle. Keyboard shortcuts cover almost every action, so working through a large shoot with the arrow keys alone becomes second nature within a day. There is also a portable version that runs from a folder or USB stick without installing anything.

In August 2026 the project released ImageGlass 10, a rebuilt cross-platform version. The long-running Classic edition remains free and open source; a separate Pro edition adds extras such as HDR tone mapping, a file watcher and admin controls. For most people, Classic is the complete viewer they need.

Key Features

Free image viewer: A complete, open-source viewer with no ads, no account and no feature timers.
80+ image formats: Opens JPG, PNG, GIF, WebP, AVIF, HEIC, SVG, ICO and RAW photos without extra codecs in most cases.
Lightweight and fast: Starts in a fraction of the time of the stock Photos app, even in folders with thousands of images.
Slideshow mode: Play folders as slideshows with adjustable timing for presentations and family viewing.
Themes and layouts: Change colours, toolbar layout and thumbnail panel to match how you like to browse.
Portable version: Run ImageGlass from any folder without installation — ideal for USB toolkit drives.
Handy tools built in: Zoom, rotate, flip, crop, colour picker and quick conversion between common formats.

System Requirements

Operating System: Windows 10 or Windows 11 (64-bit)
Processor: Any modern Intel or AMD CPU
RAM: 2 GB minimum, 4 GB recommended for very large RAW files
Storage: Under 100 MB for the app (portable version is similar)
Display: 1024×768 or higher
Runtime: Current versions use the .NET runtime — the official download page links the exact build you need
Internet: Only needed for the download and updates

How to Download ImageGlass (Official Method)

ImageGlass is free, so unofficial download portals offer you nothing except risk — repackaged installers and outdated builds are common. The official website links to the genuine releases, including the portable version and the Classic edition.

Official Website: Download ImageGlass from the official website

Step-by-Step Installation

Open the official ImageGlass website linked above and go to the Download page.
Choose the standard Windows installer (or the portable ZIP if you prefer not to install).
Download the file and save it to your Downloads folder.
Double-click the installer and approve the Windows permission prompt.
Keep the default install location and finish the setup wizard.
Launch ImageGlass from the Start menu and open any image to test it.
When Windows asks which app should open images, pick ImageGlass — or set it later in Settings using the tip below.

Tip: To make ImageGlass your default photo viewer, open Windows Settings → Apps → Default apps, search for ImageGlass, and assign it to JPG, PNG, WebP and the other formats you use most.

How to Browse Photos with ImageGlass

Open any image in a folder with ImageGlass — the whole folder loads automatically.
Use the arrow keys or the on-screen arrows to move between photos quickly.
Scroll the mouse wheel to zoom, and drag to pan around large images and RAW files.
Press the slideshow button to play the folder automatically at your chosen interval.
Use the rotate and flip tools for phone photos that imported sideways, then save the fix.
Open Settings to pick a theme and set thumbnail size for easier browsing of big folders.

ImageGlass Classic vs Pro: What Is Free?

The Classic edition is free and open source, and it is the version this guide installs. It includes the full viewer — the wide format support, slideshows, themes, portable build and editing basics — with no expiry and no licence key.

The Pro edition is an optional paid upgrade from the same developer. It adds power-user extras such as HDR tone mapping, a file watcher that refreshes folders automatically, and additional admin controls aimed at managed workplaces. Casual and even serious home users rarely need it. If you simply want a fast default photo viewer, Classic is the right download and it costs nothing.

Frequently Asked Questions

Is ImageGlass safe to download?
Yes, from the official website linked above, which the developer publishes himself. Unofficial download sites may bundle the installer with extras or host outdated versions, so stay with the official source.

Is ImageGlass really free?
Yes. The Classic edition is free and open source under GPLv3, with no trial period. The separate Pro edition is paid, but it only adds advanced extras — the core viewer remains free.

Can ImageGlass open HEIC and RAW photos?
Yes. It supports HEIC photos from iPhones and RAW files from major camera brands, along with more than 80 other formats. Some RAW rendering depends on the built-in Windows codec support on your PC.

How do I make ImageGlass my default viewer?
Open Windows Settings → Apps → Default apps, choose ImageGlass, and assign it to the image formats you use. After that, double-clicking a photo opens it in ImageGlass directly.

Conclusion

ImageGlass is the rare utility that simply makes Windows better: faster photo opening, far wider format support and a clean interface, all free. Download the Classic edition from the official website, set it as your default viewer, and forget the slow stock app.

Download ImageGlass from the Official Website