Karthik Divi
·3 min read

Milligram Online Editor - Free Minimalist CSS Playground

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Milligram weighs about 2KB gzipped. For context, that is smaller than most favicons. It provides a Flexbox-based grid, clean typography, styled form elements, and buttons. No JavaScript. No themes. No component library. Just enough CSS to make raw HTML look good.

The framework is built around a simple idea: browser defaults are ugly, but you should not need 200KB of CSS to fix them. Milligram sits in that gap -- your HTML gets pleasant typography, readable spacing, and a usable grid without adopting a design system.

Who is Milligram for?

Milligram is popular with developers who care about page weight and want to own their design decisions. It gives you a clean starting point, not a finished look.

It works well for:

  • Personal sites and blogs where you want fast load times
  • Forms and data entry UIs that need clean styling without visual clutter
  • Documentation pages or internal tools
  • Any project where you plan to write most of your own CSS anyway

An online editor is a natural fit here. Milligram is small enough to load instantly from a CDN, and the framework's simplicity means you will spend time writing HTML, not debugging framework behavior.

Clean form layout with Milligram

Forms are where Milligram really shines. The default input styling is clean and consistent:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/milligram/1.4.1/milligram.min.css">
</head>
<body>
  <div class="container" style="margin-top: 40px; max-width: 560px;">
    <h3>Create Account</h3>
    <p>All fields required. Your data stays on this device.</p>
    <form>
      <fieldset>
        <div class="row">
          <div class="column">
            <label for="firstName">First Name</label>
            <input type="text" id="firstName" placeholder="Ada">
          </div>
          <div class="column">
            <label for="lastName">Last Name</label>
            <input type="text" id="lastName" placeholder="Lovelace">
          </div>
        </div>
        <label for="email">Email</label>
        <input type="email" id="email" placeholder="[email protected]">
        <label for="role">Role</label>
        <select id="role">
          <option value="" disabled selected>Select your role</option>
          <option value="dev">Developer</option>
          <option value="design">Designer</option>
          <option value="pm">Product Manager</option>
        </select>
        <label for="bio">Short Bio</label>
        <textarea id="bio" placeholder="Tell us about yourself..."></textarea>
        <input class="button-primary" type="submit" value="Create Account">
      </fieldset>
    </form>
  </div>
</body>
</html>

No special classes on the inputs. Milligram styles native form elements directly, so <input>, <select>, and <textarea> all look consistent out of the box. The row and column classes handle the two-column first/last name layout.

The result is a form that looks intentionally designed, not like default browser chrome. And it loads in milliseconds.

Milligram vs. Skeleton

Both are minimal, but they solve the problem differently. Skeleton uses a 12-column grid with explicit column counts (six columns, four columns). Milligram uses Flexbox with equal-width columns by default. Milligram's typography is more opinionated -- the purple accent color and the font choices give it a specific look.

Milligram is also actively maintained, which matters if you care about keeping dependencies current.

Try Milligram on OneCompiler

OneCompiler's Milligram playground lets you write HTML, include the tiny CSS file, and see your styled output immediately.

Open the Milligram Online Editor on OneCompiler

For a 2KB framework, you get a surprisingly polished result. Give it a try and see how far you can get before you need to write any custom CSS.