HTML to Haml Converter

Transform HTML/ERB into Haml with ease. Built for Rails developers who value clean, structured code.

Tags: convert code erb haml html rails template converter

🚀 359,330 total conversions (1 this month)

Practice Python with coding challenges

Solve hands-on problems right in this editor: run the sample tests, submit, and get an AI code review.

All Python challenges
Easy

Rectangle Perimeter

Compute the perimeter of a rectangle from its sides.

You'll learn ArithmeticReturn values
BeginnerLearning-pathVariables
Easy

Dot Product of Two Vectors

Multiply two vectors element by element and add the results: the core operation of every neuron.

You'll learn VectorsDot product
Neural networksaimachine learning
Easy

Distance Between Points

Compute the straight-line distance between two points.

You'll learn Pythagorean theoremSquare roots
BeginnerFunctionsLearning-pathmath
Easy

Average of Three

Average three whole numbers.

You'll learn ArithmeticDivision
BeginnerLearning-pathVariables
Easy

To-Do List

Keep a list of tasks: add them, mark them done, remove them and report what is still pending.

You'll learn Typed collectionsRecords
BeginnerSimulationStrings
Easy

Prime Number Check

Decide whether a number is prime.

You'll learn DivisibilityLoop optimization
BeginnerLoopsNumbersStudent-beginner
Easy

Days in a Month

Return how many days a month has, including leap years.

You'll learn Calendar rulesHelper functions
BeginnerConditionsFunctionsLearning-path
Easy

Count Pairs With a Sum

Count pairs of positions whose values add up to a target.

You'll learn Pairs of indexesAvoiding double counts
ArraysBeginnerLearning-pathNested-loops
Easy

Min and Max Together

Find the smallest and largest value in one pass.

You'll learn Single passMultiple return values
ArraysBeginnerFunctionsLearning-path
Easy

Hollow Square

Draw the outline of a square with * characters.

You'll learn Edge detectionBuilding strings
BeginnerLearning-pathNested-loopsPatterns
Easy

Number Triangle

Build a triangle of increasing numbers.

You'll learn Growing rowsCounters across rows
BeginnerLearning-pathNested-loopsPatterns
Easy

Pyramid Rows

Draw a right-aligned pyramid of # blocks.

You'll learn String patternsPadding
BeginnerLearning-pathNested-loopsPatterns

What is This Tool?

This free online converter helps you instantly convert HTML and ERB (Embedded Ruby) templates into clean, readable Haml code. It’s ideal for Ruby on Rails developers who want to simplify and modernize their views.

How to Use

  1. Paste or type your HTML+ERB code into the editor.
  2. Click Convert to generate Haml.
  3. Download, copy, or share the Haml result instantly.

You can also sign in with Google or GitHub to save your conversion history and download files later.

Why Haml?

Haml (HTML Abstraction Markup Language) is a whitespace-sensitive templating engine for Ruby, commonly used in Rails. It replaces inline HTML with clean, indented syntax that’s easier to read and maintain.

Benefits of Haml include:

  • Cleaner and shorter syntax compared to ERB
  • Improved readability and maintainability
  • Faster front-end templating for Rails developers

Haml is used by many Ruby shops and developers for rapid Rails development, including Unspace Interactive.

Learn more at the official Haml website.

Haml Syntax Example


%section.container
  %h1= post.title
  %h2= post.subtitle
  .content
    = post.content

    

HTML+ERB vs Haml Example

HTML+ERB


<!doctype html>
<html>
  <head>
    <meta charset="utf-8"/>
  </head>
  <body>
    <h1>Blogg</h1>
    <p>Time: <%%= Time.now %%></p>
    <%% Post.all.each do |post| %%>
      <article>
        <h2><%%= post.title %%></h2>
        <div><%%= post.body %%></div>
      </article>
    <%% end %%>
  </body>
</html>

Haml


!!!
%html
  %head
    %meta{ content: "text/html; charset=UTF-8", "http-equiv": "Content-Type" }/
    %meta{ charset: "utf-8" }/
  %body
    %h1 Blogg
    %p
      Time:
      \#{Time.now}
    - Post.all.each do |post|
      %article
        %h2= post.title
        %div= post.body