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From the Microsoft Store. It runs on Windows 10 (version 1809 or later) and Windows 11, and the Store keeps it up to date. There is no Mac or Linux version.

US$11.99, and free until 31 October 2026. A copy you get while it’s free stays free, updates included. A later price applies only to people who get Leaf after that, never backwards. The Store listing shows today’s price.

Yes, within 30 days of purchase, with no reason needed: write to [email protected]. The Microsoft Store’s own refund process also applies. See the terms.

Send us its file extension, and the file if you can, through the support form.

Leaf never takes a file type from an app you already use; it adds itself to “Open with” instead. To make Leaf the default for a type, click Opening files with Leaf in Leaf’s title bar and then Open Windows Settings, or go to Settings › Apps › Default apps › Leaf Viewer.

Press Ctrl+U to see the file’s source. If the source looks right but the page doesn’t, it’s a bug: send us the file if you can.

Leaf only reads; it never changes the files it opens. Edit in your usual app, and Leaf updates when you save.

Press F1 or ? in Leaf for the full list. The common ones: Ctrl+O open, Ctrl+P print or save as PDF, F11 full screen, F fill the screen with a film, picture or model, Ctrl++ and Ctrl+− zoom, Ctrl+Shift++ and Ctrl+Shift+− text size, Space play and pause, C subtitles.

Leaf follows Windows: change it in Settings › Personalisation › Colours. Documents keep the paper they are read on: a letter or a spreadsheet stays light, and code and films stay dark.

Write to [email protected], or use the support form, rather than posting it publicly.