# HTMaiL: Insert HTML into email message

> This extension will allow you to easily insert HTML code into the body of the message from your favorite webmail service: Gmail, Outlook, and Yahoo Mail.

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

## Overview

- **ID:** `htmail`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** dziul
- **Category:** web-development,social-communication,tabs
- **Daily users:** 1,035
- **Weekly downloads:** 32
- **Rating:** 5.00 / 5 (7 ratings)
- **Version:** 7.7.0
- **Last updated:** 2026-03-11
- **First published:** 2020-05-28
- **Size:** 492 KB
- **Data as of:** 2026-09-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/htmail/)

## Description

HTMaiL is a Chrome extension that empowers users to effortlessly insert custom HTML code into their email messages across popular webmail services like Gmail, Outlook, and Yahoo Mail. It enhances email creation beyond basic formatting by providing an easy-to-use HTML editor with live preview capabilities.

Key features include seamless integration into webmail compose interfaces, the ability to insert HTML templates at the cursor position or selected text, and automatic conversion of CSS styles into inline styles to ensure proper formatting without style leakage. The adaptive HTML editor theme matches your OS theme for a consistent user experience. While it doesn't replace mass mailer systems and has limitations such as handling media queries or external fonts, HTMaiL uniquely transforms email composition to help create more professional and visually engaging messages.

## Rankings

- #3,211 — Overall
- #309 — Tabs
- #352 — Web Development
- #3 — insert
- #4 — message
- #5 — hotmail

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `management`

### Content script matches

- `mail.google.com`
- `inbox.google.com`
- `mail.yahoo.com`
- `*.mail.yahoo.com`
- `outlook.live.com`
- `outlook.office.com`
- `outlook.cloud.microsoft`
- `outlook.office365.com`

## Safety

- **Risk impact:** Very 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/htmail)