# Checka11y.css

> This browser extension allows you to use Checka11y.css directly in your browser. Just simply toggle Checka11y.css on & off to see the accessibility issues highlighted instantly.

Canonical page: [https://chrome-stats.com/d/checka11y-css](https://chrome-stats.com/d/checka11y-css)

## Overview

- **ID:** `checka11y-css`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jack Domleo
- **Category:** web-development
- **Daily users:** 2
- **Version:** 1.3.0
- **Last updated:** 2023-12-18
- **First published:** 2021-01-10
- **Size:** 2.01 MB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/checka11y-css/)
- **Website:** [https://checka11y.jackdomleo.dev](https://checka11y.jackdomleo.dev/)

## Description

Checka11y.css is a Firefox add-on that provides a CSS-only accessibility checker. With this extension, you can easily assess the accessibility of your website by analyzing its CSS code.

## Rankings

- #66,393 — Overall

## Permissions and access

### 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/checka11y-css)