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

🚀 359,329 total conversions (8 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

Distance Between Points

Compute the straight-line distance between two points.

You'll learn Pythagorean theoremSquare roots
BeginnerFunctionsLearning-pathmath
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

Average of Three

Average three whole numbers.

You'll learn ArithmeticDivision
BeginnerLearning-pathVariables
Easy

Rectangle Perimeter

Compute the perimeter of a rectangle from its sides.

You'll learn ArithmeticReturn values
BeginnerLearning-pathVariables
Easy

Join Customers and Orders

Join customers with their orders like a LINQ Join and report each customer's total spend.

You'll learn LINQ JoinGrouping
ArraysSorting
No solutions yet
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
No solutions yet
Easy

Linked List Operations

Simulate a linked list: add at either end, remove from the front or by value, and reverse it.

You'll learn Linked listsSimulation
Data-structuresSimulation
No solutions yet
Easy

Sum a Flat JSON Object

Parse a flat JSON object whose values are integers and add up the values.

You'll learn JSON parsingString splitting
ParsingStrings
No solutions yet
Easy

WhenAll Total Time

Find how long a program takes when each group of tasks runs together with Task.WhenAll and groups run one after another.

You'll learn Async/awaitTask.WhenAll
ArraysBeginner
No solutions yet
Medium

Parallel Task Completion Order

Run tasks concurrently with at most k at a time and report the order in which they finish.

You'll learn ConcurrencyPriority queues
SimulationSorting
No solutions yet
Medium

Min Stack

Build a stack that reports its smallest element instantly after any push or pop.

You'll learn StacksRunning minimum
Data-structuresStacks
No solutions yet
Easy

Unique Records

Remove duplicate records that are equal by value, keeping the first of each in order.

You'll learn RecordsValue equality
BeginnerStrings
No solutions yet

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