premailer/premailer

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

2416 stars · 361 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Premailer is a Ruby gem that prepares HTML email for delivery by inlining CSS styles, converting relative URLs to absolute, and checking CSS properties against email client support. It can also generate a plain-text version of the email and report potentially problematic CSS.

Use cases

• inline css styles into html emails
• convert a newsletter html file to email-safe html
• generate plain text version of an html email
• check which css properties are unsupported by email clients
• convert relative links and image paths to absolute urls in email html

When to choose

• you send HTML email from Ruby and need inline CSS for client compatibility
• you want automated warnings about email-client-unsupported CSS
• you need a plain-text alternative generated from HTML email

When to avoid

• you need email sending/delivery itself - this only transforms HTML
• your project is not in Ruby
• you need MJML-style component-based email templating

Facets

library · maturity active

templating email parser css-framework email web-development developer-tools ruby cli html-email css-inlining email-compatibility plain-text-generation nokogiri

Member repositories

For agents

markdown · JSON · MCP: product_card(name="premailer/premailer")