Click a photo and wait two seconds for it to open? The default Windows Photos app got heavy for no reason. ImageGlass opens any image instantly regardless of size.
A super light image viewer, free and open source, built for one job done well: showing your photos fast with zero clutter. Arrow keys to move between images, mouse wheel to zoom, done.
What is ImageGlass?
ImageGlass is a free open-source image viewer for Windows that opens 80+ image formats, including modern ones Windows struggles with like WebP, HEIC and AVIF, and even design files like SVG. The interface is clean and minimal, and the speed is what makes you never go back to the default viewer.
How to make it your default viewer
- Download it from imageglass.org and install.
- Right-click any image, choose Open with, then Choose another app.
- Pick ImageGlass and enable Always.
- From now on every image opens in it instantly.
Why it stands out
- Opens images instantly, even large ones.
- Supports WebP, HEIC and AVIF that Windows viewer sometimes rejects.
- Fast folder-wide browsing with arrow keys.
- Free, open source and ad-free.
Why replace the Windows viewer at all?
The default Photos app in Windows 11 ships with AI features, editing and cloud hooks, and all of it slows it down. If all you want is to see your photos fast, a light dedicated image viewer for Windows like ImageGlass saves you seconds every single time, and those seconds add up.
Frequently asked questions
Can it edit photos?
It has basic tools like crop and rotate, but it is primarily a viewer, not an editor.
Does it work on Windows 10?
Yes, it supports Windows 10 and 11.
Is it safe?
Fully open source with the code public on GitHub, just download from the official site only.
Alternatives
And if you want to clean Windows of the features slowing it down in the first place, check our guide to the RemoveWindowsAI script.
Note: During install, pick which formats it should open by default, and you can change that anytime in settings.
The bottom line
Open the same photo in the default viewer and in ImageGlass, and the difference will settle it. A tiny tool that upgrades your everyday computer use.
Link: ImageGlass
