# HTML Tag Error Checker

> Check the HTML start and end tags for problems.

Canonical page: [https://chrome-stats.com/d/html-tag-error-checker](https://chrome-stats.com/d/html-tag-error-checker)

## Overview

- **ID:** `html-tag-error-checker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** macha
- **Category:** web-development
- **Daily users:** 76
- **Weekly downloads:** 1
- **Version:** 16.3.1
- **Last updated:** 2026-03-30
- **First published:** 2024-05-15
- **Size:** 1.70 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/html-tag-error-checker/)

## Description

The **HTML Tag Error Checker** Chrome extension helps web developers and designers automatically detect errors in HTML code, focusing on the correctness of start and end tags. It highlights issues by displaying the total number of errors prominently on the extension icon and provides detailed results in a dedicated tab for easy review.

Key features include automatic checking on customizable websites, exclusion options for sites you want to skip, and tailored warning rules to suit various coding standards. Additionally, it supports in-depth analysis of HTML files, enabling developers to maintain clean and valid markup. The extension operates entirely locally using JavaScript, ensuring that no data is sent externally and maintaining user privacy. Note that its behavior may vary on pages with forms such as login screens.

## Rankings

- #13,233 — Overall
- #6 — error
- #29 — html
- #80 — checker
- #84 — problem

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `tabs`
- `contextMenus`

### Content script matches

- `<all_urls>`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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/html-tag-error-checker)