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Proofly

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Overview

Proofly — private, offline proofreading powered by packaged Harper, with optional Chrome AI rewrites.

Proofly is a Chrome extension for private, on-device proofreading, powered by the packaged Harper English proofing engine. It puts an editor pane in the browser side panel — you type, and grammar, spelling, punctuation, capitalization, usage and style feedback comes back in real time. It also spell checks ordinary websites. Everything runs client-side; your text never leaves the device unless you explicitly turn on optional sync to your own GitHub repo. Proofreading—including spelling—is always handled by Harper. Gemini Nano is used only by the optional Rewrite feature when Chrome's built-in Rewriter API is enabled.

Details

  • Version
    0.1.3
  • Updated
    July 23, 2026
  • Offered by
    Bill Hedworth
  • Size
    8.03MiB
  • Languages
    English (United Kingdom)
  • Developer
    Email
    bill.hedworth@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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