# Clever Checker

> Run every Clever Checker writing check on selected text, without leaving the page.

Canonical page: [https://chrome-stats.com/d/cleverchecker](https://chrome-stats.com/d/cleverchecker)

## Overview

- **ID:** `cleverchecker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Clever Checker
- **Category:** language-support
- **Daily users:** 1
- **Version:** 0.3.4
- **Last updated:** 2026-08-24
- **First published:** 2026-07-22
- **Size:** 226 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cleverchecker/)
- **Website:** [https://cleverchecker.com](https://cleverchecker.com/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/cleverchecker/privacy/](https://addons.mozilla.org/firefox/addon/cleverchecker/privacy/)

## Description

Clever Checker puts the whole <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/a36ad7d55e97cc9370b6789cda8ce864655a19a1a6257c42bff325f785413cb5/http%3A//cleverchecker.com" rel="nofollow">cleverchecker.com</a> toolkit in a side panel, so you can check writing where you wrote it instead of pasting it into another tab.

Select text on any page, right-click, and pick Clever Checker. The panel opens with your selection already in it.
<ul><li>Grammar and spelling, checked as you type, with corrections you apply in one click</li><li>AI-writing detection, scored sentence by sentence</li><li>Plagiarism, matched against sources on the open web</li><li>Readability, word and keyword counts, reading time</li><li>Paraphrasing, humanising and summarising, written back into the field you were typing in</li></ul>
Nothing is set up and nothing is configured. There is no sign-in step and no server address: open the panel and press the button. Five checks a day are free without an account, and signing in on the website carries a subscription across to the panel.

The panel only ever sees text you select or type into it. It does not read the pages you browse, and it carries no analytics.

## Rankings

- #109,244 — Overall
- #32 — paraphraser
- #32 — paraphrasing
- #45 — paraphrase

## Permissions and access

### Permissions

- `contextMenus`
- `storage`
- `activeTab`
- `scripting`
- `clipboardRead`
- `clipboardWrite`

### Host permissions

- `https://cleverchecker.com/*`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/cleverchecker)