Browser extension

Check everywhere you write

Select some text and check it where it is. Every tool on the site, in the page you are already on.

Add to Chrome Add to Safari Add to Edge Add to Firefox

Free to add. Works with your Clever Checker account.

How to use it

Select some text Open Clever Checker

Where to use it

Everywhere you browse

In the tab

What it looks like

The panel checking grammar: fourteen issues found, each correction listed beside the marked-up text.
Grammar, as you type
The panel scoring text for AI writing: 90% AI-generated, with every sentence marked as AI-like, mixed or human.
An AI score per sentence
The panel scoring readability: a post-graduate reading level and the six formula scores under it.
What makes it hard to read

What it does

The whole toolbox, in the tab

Select, then check

Highlight a paragraph in your doc, your inbox or your CMS and pick a tool. The extension reads the selection so you never leave the page.

The same result

Reports render from the exact layouts the site uses: the AI-generated score, per-sentence highlights, matches and issues.

Rewrite in place

Paraphrase or humanize a selection and drop the result straight back into the field you were editing. Only when you ask it to.

Get it

Works on Every browser

Chrome Chrome Web Store Firefox Firefox Add-ons Safari Mac App Store Edge Edge Add-ons Brave Chrome Web Store Opera Chrome Web Store Yandex Chrome Web Store Vivaldi Chrome Web Store

One extension, one source tree. Chrome, Edge, Brave, Opera, Yandex and Vivaldi all install the Chromium build from the Chrome Web Store; Firefox and Safari have their own.

QR code linking to cleverchecker.com

On your phone

Scan to visit on mobile

The extension is for desktop browsers. Point your phone's camera at this code to open Clever Checker on mobile, where every tool runs in the browser.

Pricing

Included with Unlimited

The extension is part of Clever Checker Unlimited, not an add-on. Start free with the same daily checks, and everything unlocks the moment you upgrade. See Pricing for plans and Billing for the terms.

Your text is handled exactly as it is on the site: sent only to run the check, then saved to your account until you delete it, or auto-deleted if you are not signed in. Details in Privacy.

See every tool