1.
Select the text.
In an email, a document, a note, any app.
One gesture, and your text is corrected on-device. Your text never leaves your computer. On Windows: double-tap the right Alt key (AltGr). On Mac: ⌃ ⌥ ⌘ C.On Mac: ⌃ ⌥ ⌘ C. On Windows: double-tap the right Alt key (AltGr).
In an email, a document, a note, any app.
The correction replaces the original and is already on your clipboard.
Grammar, spelling, conjugation. SpellFix fixes your text and auto-copies it to the clipboard. Your text is never sent to the internet.
Professional, concise, friendly, or create a custom button like "Molière", just for fun. Tones are fully customizable: add your own, remove the ones you don't use.
Automatic source-language detection, translation to any target you pick. All local, all within your clipboard flow.
On Mac, SpellFix uses Apple's Foundation Model by default; on Windows, a bundled inference engine. You can also download extra local models (Qwen, Gemma, SmolLM, etc) as needed. No model requires an internet connection, once installed.
Unlimited correction Reformulation Translation Local AI models
Watermark on output : "— Corrected by SpellFix"
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Unlimited correction Reformulation Translation Local AI models No watermarkDownload
The Pro trial starts automatically at install. For 7 days, SpellFix produces output without a watermark. After that, the app remains free, the watermark appears unless you own the Pro version.
Yes. Correction and translation run locally on your computer. Your text is never sent over the internet.
On Mac: Apple's Foundation Model, preinstalled on Apple Silicon Macs (macOS 26+). On Windows: a local model run by the bundled inference engine. On both, you can add other local models (Qwen 3.5, Gemma 4, SmolLM3) from the settings.
No. No network request is made during correction or translation. You can verify this with Little Snitch or any equivalent tool.
Yes. The shortcut is global: Mail, Notes, browser, Word, Slack, Figma, everywhere. On Windows, double-tap the right Alt key (AltGr on European keyboards); on Mac, the ⌃ ⌥ ⌘ C shortcut (change it in System Settings › Keyboard › Keyboard Shortcuts).On Mac, the ⌃ ⌥ ⌘ C shortcut (change it in System Settings › Keyboard › Keyboard Shortcuts); on Windows, double-tap the right Alt key (AltGr). Customizable.
Yes. In the settings, you can add, remove, or edit tones. Your layout is yours.
All features are identical.
The only difference: the free version appends a small "— Corrected by SpellFix" watermark to generated text. The first 7 days are on Pro, watermark-free.
Yes. $24 once and it's yours forever. No subscription, no resale, no renewal.
On Mac, Apple's App Store rules apply (refund from Apple within 14 days). On Windows, refunds are handled by the Microsoft Store.
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Concise
Friendly
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Fix grammar
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