Installation

Installation

Pre-built binaries are attached to every GitHub Release.

Windows

The easiest way is winget:

winget install StruisICT.InLook
winget upgrade StruisICT.InLook   # later, to update

Or download inlook-<version>-x86_64.msi (installer) or the standalone inlook.exe from the releases page.

WebView2: InLook renders the email body with the Microsoft Edge WebView2 Runtime, which ships with Windows 10/11 by default. If it is missing, InLook shows a clear message telling you how to install it (it is a free Microsoft download).

Make InLook your default email-file viewer

After installing, run once from an elevated terminal:

inlook register

This registers InLook for .eml, .msg, and .oft and opens Windows Settings on InLook's page — click Set default (Windows 11) or pick InLook per file type (Windows 10). InLook also offers this the first time you open a file. To undo: inlook unregister.

Linux

Package	Install
Debian/Ubuntu .deb	sudo apt install ./inlook_<version>-1_amd64.deb
AppImage	chmod +x InLook-<version>-x86_64.AppImage && ./InLook-<version>-x86_64.AppImage
Flatpak	com.struisict.InLook (Flathub, once accepted)

The .deb pulls in the WebKitGTK runtime it needs. For the AppImage you may need libwebkit2gtk-4.1-0 installed.

macOS

Download InLook-<version>-universal.dmg (works on Apple Silicon and Intel), or use the Homebrew cask:

brew install --cask inlook

Gatekeeper note: signed + notarized builds are coming. Until then the .dmg is unsigned, so on first launch macOS may say InLook "is damaged" or "cannot be verified." Open it once with right-click → Open → Open, or run xattr -dr com.apple.quarantine /Applications/InLook.app. This is a one-time step.