---
title: "Inline CSS into HTML emails before delivery across mail clients with Juice"
description: "Use Juice when an agent already has finished HTML and needs it transformed into email-safe output before sending, archiving, or handing off to another system. The skill inlines stylesheet rules into element style attributes so downstream mail clients and embedded contexts keep the intended presentation without manual cleanup."
verification: "security_reviewed"
source: "https://github.com/Automattic/juice"
author: "Automattic"
publisher_type: "organization"
category:
  - "Calendar, Email & Productivity"
framework:
  - "Custom Agents"
tool_ecosystem:
  github_repo: "Automattic/juice"
  github_stars: 3245
---

# Inline CSS into HTML emails before delivery across mail clients with Juice

Use Juice when an agent already has finished HTML and needs it transformed into email-safe output before sending, archiving, or handing off to another system. The skill inlines stylesheet rules into element style attributes so downstream mail clients and embedded contexts keep the intended presentation without manual cleanup.

## Prerequisites

Node.js

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

Install command or upstream instructions:

```
npm install juice
```

## Documentation

- https://github.com/Automattic/juice#readme

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/inline-css-into-html-emails-before-delivery-across-mail-clients-juice/)