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Check writing without leaving the tab

Select text on any page, or open a Google Doc, and the extension scores it right there. Results appear in a small panel with the same sentence highlights as the full app.

Add to ChromeSee the steps

Free on every plan. Works in Chrome, Edge, Brave and Arc.

Set up in 4 steps

Install once, then scan from any tab with a right-click.

  1. Step 1: Install the extension

    Add it from the Chrome Web Store, then pin it to your toolbar so it's one click away.

  2. Step 2: Sign in

    Click the Winston AI icon and sign in. Scans use your account's credits, same as the app.

  3. Step 3: Select and scan

    Highlight text and choose Scan with Winston AI from the right-click menu, or open the panel to scan the whole page.

  4. Step 4: Open the full report

    Every scan is saved to your dashboard, where you can share it or export a PDF.

What you get

Built for reading in the browser, with the full report a click away.

  • Highlights in place

    Flagged sentences are marked on the page itself, so you can see what moved the score.

  • Whole Google Docs

    Scan an entire doc from the side panel, even when it's too long to select.

  • Right-click to scan

    Select text, right-click, done. No copying into another tab.

  • Nothing read in the background

    The extension only sees text you choose to scan. It never reads pages on its own.

  • Saved to your dashboard

    Come back to any scan later, or share the report with a colleague.

  • 14 languages

    Detects the language automatically, the same as the app.

Questions about the extension

Something else? Ask our team.

No. It only reads text when you select it and choose to scan, or when you open the panel on a page. Nothing is collected in the background.

No. The extension is free, and scans use credits from your plan exactly like scans in the app.

Yes. Open the panel in any doc you can view to scan the whole document, or select a passage to scan just that part.

Chrome and other Chromium-based browsers, including Edge, Brave and Arc. A Firefox version is planned.

Other integrations

All integrations

Start free, then add the extension

Create an account in under a minute, then follow the 4 steps above. Setup takes about a minute.

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