# ReadEase: Readability Score Calculator

> Calculate and display readability scores for web page content

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

## Overview

- **ID:** `readease-readability`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Kuwin Day
- **Category:** other
- **Daily users:** 2
- **Version:** 1.0
- **Last updated:** 2024-08-25
- **First published:** 2024-08-24
- **Size:** 31 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/readease-readability/)

## Description

Calculates and displays Flesch-Kincaid Grade Level and Flesch Reading Ease scores
Shows word count, sentence count, average words per sentence, and average syllables per word
Highlights difficult sentences (optional and customizable)
Customizable minimum word count for analysis
Options page for easy customization
Popup with quick access to results and options
Refresh button to recalculate scores
Works with dynamic content changes
Error handling for insufficient content
Persistent settings across browser sessions

## Rankings

- #67,202 — Overall
- #118 — score
- #204 — calculator
- #216 — calculus

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions 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/readease-readability)