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Premailer project preview
MarketingAlternative to Mailchimp InlinerAlternative to LitmusAlternative to Campaign Monitor Inliner

Premailer

Pre-flight CSS and styling inliner for HTML email newsletters written in Ruby.

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LicenseBSD-2-Clause
GitHub stars2.8k
Last commit6 days ago
Tags5 topics
Email Preflight ToolPremailer LibPlain Text Email GeneratorRuby Css InlinerMarketing
Overview

Why consider Premailer?

Premailer is an open-source pre-flight CSS inliner and HTML email optimization tool written in Ruby by Dialect. Premailer converts CSS pseudo-classes, moves styles into inline HTML attributes, verifies recipient link domains, and creates plain text versions automatically.

Guided learning

Learn Premailer by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of Premailer

Premailer prepares HTML newsletters for multi-device email clients by inlining CSS style blocks.

Quickstart

bash
1gem install premailer
2premailer template.html > output.html

Premailer is licensed under the BSD 2-Clause License.

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Premailer FAQs

Premailer is listed as a Marketing tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

Premailer is listed under the BSD-2-Clause license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

Premailer is listed as an alternative to Mailchimp Inliner. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.