Switcher3way for Windows · last updated 3 August 2026
Switcher3way does not collect, store, or transmit anything you type. All processing happens on your device, in memory, and nothing is written to disk or sent anywhere.
To fix a word typed in the wrong keyboard layout, Switcher3way has to see the keys you press. It uses a system-wide keyboard hook for this. The keys of the word you are currently typing are held in memory only, and are discarded as soon as the word ends, you move the caret, click, or switch applications. No keystroke history is kept, no log of typed text is produced, and nothing is uploaded.
Reading a selection. When you press the trigger key, Switcher3way checks whether you
have text selected — the only way Windows offers to read a selection from another application is to ask
it to copy. So the app sends a Ctrl+C, reads what arrived (at most 200 characters), and
puts your previous clipboard contents back. The text is used solely to work out which
layout it belongs to. It is not stored or sent anywhere.
Writing a replacement. Since version 0.3.0, when the corrected text is longer than about two dozen characters the app puts it on the clipboard and pastes it, then restores your previous clipboard contents. Typing long text one keystroke at a time proved both slow and unreliable — applications sometimes received it garbled — so a single paste is how a long correction is made safely. Shorter corrections, which is nearly all of them, are typed and never touch the clipboard. This can happen during an automatic correction as well as a manual one, so it is not limited to the moment you press the trigger.
The text involved is always your own text, on its way back into the document you are editing. It is not stored by this app and never leaves your device. One consequence worth knowing: if you use a clipboard-history tool — including Windows' own clipboard history — it may record that momentary clipboard entry, exactly as it would for anything else you copy.
Your preferences (whether the app is enabled, the trigger key, interface language, and your exception lists) are stored on your own PC. Nothing in them is shared.
An optional debug log is off by default. If you turn it on to troubleshoot, it records what was detected and converted — so it may contain words you typed. It stays on your PC, you can open its folder from Settings, and you can delete it at any time. Turning the setting off stops it being written.
Word checking uses dictionaries bundled inside the app, so validating what you type never requires a network connection.
The app is a keyboard utility, is not directed at children, and collects no personal information from anyone.
If this policy changes, the updated version will be published on this page with a new date.
Questions or reports: open an issue at github.com/WhisKeySwitch/Switcher3way.