# Emailens
> The email rendering linter for developers , catches what breaks across Gmail, Outlook, Apple Mail and 12 more clients, in the editor, CLI and CI, with framework-native fixes for React Email, MJML and Maizzle. Open-source core.

- [Full Documentation (raw text)](https://docs.emailens.dev/llms-full.txt): Complete documentation concatenated in a single file for AI ingestion.
- [Documentation Index](https://docs.emailens.dev/llms.txt): AI-friendly map of all documentation pages.

## Core product
- [Email preview app](https://emailens.dev/): Interactive web interface to preview HTML emails and inspect compatibility issues.
- [Email CSS support index](https://emailens.dev/email-css): Comprehensive database of CSS feature support across major email clients.
- [Free email tools](https://emailens.dev/tools): Utilities for testing and linting email HTML code.
- [MCP server](https://emailens.dev/mcp): Model Context Protocol server to integrate Emailens into your AI coding agent workflow.
- [Figma plugin](https://emailens.dev/figma): Emailens integration for linting and previewing designs directly inside Figma.

## Documentation and guides
- [Documentation](https://docs.emailens.dev): Core user guides, API reference, and setup instructions.
- [Blog](https://emailens.dev/blog): Latest articles, guides, and engineering updates.
- [React Email guide](https://emailens.dev/blog/react-email-guide): Step-by-step guide to building and previewing React Email templates.
- [MJML guide](https://emailens.dev/blog/mjml-guide): Best practices and tips for writing MJML email templates.
- [Outlook CSS guide](https://emailens.dev/blog/outlook-css-guide): Detailed guide on working around Outlook's rendering quirks and limitations.

## Open-source packages
- [@emailens/engine](https://github.com/emailens/engine): Core email compatibility scoring and linting engine.
- [@emailens/mcp](https://github.com/emailens/mcp): Model Context Protocol server repository.
- [@emailens/cli](https://github.com/emailens/cli): Command Line Interface for automated email linting in local environments and CI/CD pipelines.