Offline Grammar
Checker
Grambo is a grammar checker that works entirely offline. Using local AI models on your Mac, it corrects grammar without ever touching the internet. Fast, private, and available everywhere — even at 30,000 feet.
Download Grambo — Offline Grammar CheckermacOS 14+ · Apple Silicon · 7-day free trial
Grammar Correction With No Internet Required
Every cloud-based grammar checker has the same fundamental limitation: it stops working without a reliable internet connection. Travel, working in restricted environments, or simply a spotty connection can kill your workflow.
Grambo solves this by processing grammar locally on your Mac. The AI model runs directly on your Apple Silicon chip — the same M-series processors that power the rest of your Mac's performance. The result is grammar correction that's fast, accurate, and completely independent of any network.
When Offline Grammar Checking Matters
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✈️
Traveling or in flight — Write and edit on a plane, train, or anywhere without Wi-Fi, without interrupting your workflow.
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🏢
Secure corporate environments — Many regulated industries (finance, healthcare, legal) prohibit sending documents to external services. Offline grammar checking solves this entirely.
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Sensitive documents — Legal filings, confidential reports, NDA-covered work — content that should never leave your device.
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⚡
Speed over cloud latency — Local processing is often faster than round-tripping to a cloud server and back, especially on Apple Silicon Macs.
Powered by Local AI Models
Grambo uses state-of-the-art language models that run entirely on your device. You don't need to set up anything technical — Grambo handles model management with a single-click auto-setup.
Llama & Qwen Models
Choose from optimized models like Llama 3.2 3B or Qwen 3 1.7B. Grambo auto-downloads and configures the model for you.
Apple Silicon Optimized
Local models run natively on your M1/M2/M3 chip using Metal GPU acceleration — fast responses without draining battery unnecessarily.
One-Click Auto Setup
Go to Settings → Local AI → Auto Setup. Grambo downloads and configures everything automatically. No command line, no technical knowledge needed.
Optional Cloud Mode
Need instant setup without local models? Enable Grambo Cloud (monthly plan). Switch back to offline anytime with one click.
Secure Writing — Nothing Ever Leaves Your Mac
In offline mode, Grambo has zero network activity related to your writing. The AI model processes your text on-device, returns the correction, and nothing is transmitted or stored externally.
This isn't just a privacy promise — it's the architecture. There's no mechanism to send your text anywhere because offline mode doesn't use any network calls for grammar processing.
Want to understand how Grambo's privacy model works in more detail? Read about our privacy-first approach to writing tools or see how Grambo stacks up against the competition in our Grambo vs Grammarly comparison.
Grammar Checking That Works Anywhere
Download Grambo and experience grammar correction that doesn't need the internet. Fast, private, and always available on your Mac.
Download Grambo for Mac