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Proofly

Proofly

Private AI proofreading that runs 100% on your device

Website chromewebstore.google.com
Overview

What it is

Proofly is a free, open-source Chrome extension that gives you industry-class proofreading without sending a single word to the cloud. Powered by Chrome’s built-in on-device AI, it underlines issues as you type and fixes spelling, grammar, punctuation and more – all locally. No accounts, no tracking, works offline, and a lightweight, non-invasive UI that respects your page, your focus and your privacy.

Intent

I need it when

Customize grammar checking by toggling specific correction types based on personal writing preferences

Proofly offers customizable correction settings allowing users to enable or disable specific checks (e.g., grammar, capitalization) and provides custom keyboard shortcuts for manual triggering, plus a dedicated sidebar for reviewing all issues

Use a lightweight, non-invasive grammar checker that doesn't require account creation or tracking

Proofly is free, requires no sign-up, collects no data, and provides a native-feeling UI with underlines and correction popovers that integrate seamlessly into the browser without telemetry or account requirements

Check grammar and spelling in real-time while writing emails, messages, or documents without sending data to external servers

Proofly runs 100% locally on the device using Chrome's built-in Gemini Nano AI, catching spelling, grammar, punctuation, capitalization, and preposition errors instantly with zero data transmission, enabling private writing assistance across input fields and textareas

Access writing assistance offline after initial setup without relying on internet connectivity

Proofly works completely offline after the initial model download, allowing users to proofread and correct text anywhere without internet access, making it ideal for users in low-connectivity environments

Drop

Not a fit when

  • User requires cloud-based data storage or cross-device synchronization of corrections
  • User needs advanced features like tone adjustment, style suggestions, or content rewriting beyond grammar fixes
  • User operates on Chrome versions below 141 or devices unable to run Chrome's built-in AI models
  • User requires integration with third-party writing platforms beyond browser input fields and textareas
  • User needs real-time collaborative editing or team-based writing feedback
Commercials

Pricing

Free View pricing