Proofly
What Proofly is
Proofly is a free Chrome extension for proofreading and writing assistance that processes text on your device. It checks spelling, grammar, punctuation, capitalization, prepositions, and missing words, then provides inline suggestions. You can use auto-correct or manual editing, a sidebar, Chrome side panel, keyboard shortcuts, and undo or redo. Correction types, highlight colors, underline styles, and shortcuts are configurable. Proofly works in input fields, textareas, and contenteditable elements, and adds a right-click context menu. Its language support follows those available through Chrome’s built-in Gemini Nano model. The model must be downloaded before use; the privacy policy puts that download at about 22 GB. Afterward, the extension works offline. Proofly requires Chrome 141 or later and a device able to run Chrome’s built-in AI models. The README lists Windows 10/11, macOS 13+, and Linux. The project is described as alpha, and Chrome Web Store installation is listed as coming soon; manual installation is available from a GitHub release.
Who it suits
Proofly suits Chrome users who want local proofreading and configurable correction tools. It is for people able to download the large AI model and run Chrome’s built-in AI features.
What it does well
- Processes proofreading locally on-device
- Checks spelling, grammar, and punctuation
- Works offline after model download
- Offers configurable correction and display settings
- Provides keyboard shortcuts and undo/redo
What to know first
- Initial AI model download is about 22 GB
- Requires Chrome 141 or later
- Chrome Web Store installation is coming soon
- Project is described as alpha
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | Free forever · no subscriptions | Free |
As github.com lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
Proofly provides a free, local proofreading extension with configurable suggestions and offline use after setup. Its Chrome and hardware requirements, large initial download, and alpha status are important before installation.
Facts from Proofly's own pages
- Availability
- The README describes Chrome Web Store installation as coming soon and gives instructions for manual installation from a GitHub release. · github.com, 12 Oct 2026
- Browser extension
- Yes · github.com, 21 Sept 2026
- Corrections
- It checks spelling, grammar, punctuation, capitalization, prepositions, and missing words. · github.com, 12 Oct 2026
- Customization
- Users can configure correction types, highlight colors, underline styles, and keyboard shortcuts. · github.com, 12 Oct 2026
- Editing tools
- It offers inline suggestions, auto-correct and manual modes, a sidebar, keyboard shortcuts, and undo/redo. · github.com, 12 Oct 2026
- Free plan
- Yes · github.com, 21 Sept 2026
- Integrations
- It works with input fields, textareas, and contenteditable elements, and includes a right-click context menu and Chrome side panel. · github.com, 12 Oct 2026
- Languages
- It supports the languages provided by Chrome’s built-in Gemini Nano model. · github.com, 12 Oct 2026
- Offline use
- Proofly works offline after the initial AI model download, which the privacy policy says is about 22 GB. · github.com, 12 Oct 2026
- Privacy
- The maker says Proofly does not collect or transmit user data and processes proofreading locally; the AI model must be downloaded initially. · github.com, 12 Oct 2026
- Project status
- The maker’s retrospective describes the project as alpha and says it had not yet been battle-tested extensively. · github.com, 12 Oct 2026
- Purpose
- Proofly is a Chrome extension for writing assistance, proofreading, and grammar correction that processes text on-device. · github.com, 12 Oct 2026
- Requirements
- Proofly requires Chrome 141 or later and a device capable of running Chrome’s built-in AI models; the README lists Windows 10/11, macOS 13+, and Linux. · github.com, 12 Oct 2026
- Security
- The project describes minimal Chrome permissions, a strict content security policy, Shadow DOM isolation, and bundled assets. · github.com, 12 Oct 2026
- Style suggestions
- Yes · github.com, 21 Sept 2026
- Support
- The maker directs users to GitHub Issues for bug reports and feature requests and GitHub Discussions for questions. · github.com, 12 Oct 2026
Where Proofly stands on Freedom251
- Grammar checkers#36 of 88