# emailmd

### Write markdown. Ship emails. No HTMHELL.

emailmd converts markdown into responsive, email-safe HTML that works across Gmail, Outlook, Apple Mail, Yahoo, and every other client.

![emailmd](https://imgs.emailmd.dev/ss/github_splash.png?1)

## Install

```bash
npm install emailmd
```

## Quick Start

```typescript
import { render } from "emailmd";

const { html, text } = await render(`
# Welcome!

Thanks for signing up.

[Get Started](https://example.com){button}
`);

// html → complete email-safe HTML
// text → plain text version for text/plain MIME part
```

> **v0.3.0 migration:** `render()` is now async. Update calls from `render(md)` to `await render(md)`. Requires Node 20+ (MJML 5).

## Charts & Data

Bar charts, progress meters, sparklines, KPI tiles, step trackers, and star ratings, each written as a plain markdown list:

```markdown
::: chart
- Spotify: 16,900
- Apple Podcasts: 12,400
- Web player: 6,200
- RSS: 2,900
:::
```

![KPI tiles, a bar chart and a sparkline, rendered by emailmd from plain markdown lists](https://imgs.emailmd.dev/ss/chart_showcase.png?1)

They are drawn from table cells and text glyphs rather than images or SVG, so they still render when the client blocks remote images, and they redraw themselves in the plain-text part instead of collapsing to a list of numbers. See the [directives reference](https://www.emailmd.dev/docs/directives).

## CLI

emailmd also ships with a command-line interface.

```bash
# Render to HTML
emailmd input.md

# Write to file
emailmd input.md -o output.html

# Plain text output
emailmd input.md --text

# Pipe from another command
echo "# Hello" | emailmd
```

Run `emailmd --help` for all options.

## React

[`@emailmd/react`](https://www.emailmd.dev/docs/react) provides a live-preview hook (`useEmailmd`), an `<EmailPreview />` iframe component, and `<EmailmdBuilder />` — the full [builder](https://www.emailmd.dev/builder) as a drop-in component for your own app.

```bash
npm install @emailmd/react emailmd
```

## Learn More

- [Docs](https://www.emailmd.dev/docs) — full syntax reference, theming, frontmatter, directives, and API
- [Templates](https://www.emailmd.dev/templates) — ready-made email templates you can copy and customize
- [Builder](https://www.emailmd.dev/builder) — live editor to write and preview emails in your browser

## MCP

emailmd ships a [Model Context Protocol](https://modelcontextprotocol.io) server, so an AI assistant can render, lint, and preview emails for you. It exposes three tools — `render` (markdown to email-safe HTML), `lint` (flag deliverability problems without rendering), and `read_docs` (look up emailmd syntax) — over either transport:

```bash
# Hosted (Streamable HTTP)
https://www.emailmd.dev/api/mcp

# Or run it locally over stdio
npx emailmd mcp
```

Published to the official MCP registry as `dev.emailmd/emailmd`. See the [MCP docs](https://www.emailmd.dev/docs/mcp) for per-client setup.

## AI

Prefer plain context over tools? emailmd is just markdown, so AI is great at writing templates. Feed the full docs to your AI tool:

```
https://www.emailmd.dev/llms-full.txt
```

## Contributing

Contributions are welcome! Feel free to open an [issue](https://github.com/anypost/emailmd/issues) or submit a [pull request](https://github.com/anypost/emailmd/pulls).

> emailmd is under active development. The API may change between minor versions until we hit 1.0 — breaking changes are always called out in the changelog. See [Stability & Versioning](https://www.emailmd.dev/docs/stability) for what the semver contract covers.

## Acknowledgements

- Built with [MJML](https://mjml.io) under the hood
- Sponsored by [Anypost](https://anypost.com/)

## License

MIT