HTMX Online Compiler / Playground

Write, test, and instantly preview HTMX-powered HTML and hypermedia interactions online with our free Online HTMX Compiler / Playground. Experiment with HTMX attributes, dynamic content updates, targets, triggers, and standard HTML without manually adding the HTMX CDN or configuring a complete local development environment.

How to Use This HTMX Compiler

  1. Write or paste your HTMX code
    Enter HTML and HTMX attributes in the Code Editor. You can experiment with attributes such as hx-get, hx-post, hx-target, hx-swap, and hx-trigger.
  2. Click the Run button
    Select Run to render your code using the pre-loaded HTMX environment. Update your markup or HTMX attributes and run the example again whenever you want to test another interaction.
  3. Check the Output preview
    View the rendered interface and supported HTMX interactions in the Output preview screen. Use the available copy, download, or delete controls while testing different examples.

Key Features

  • Pre-Loaded HTMX Library: Use supported HTMX attributes without manually inserting CDN script tags.
  • Zero Installation: No npm, Node.js, bundler, or HTMX package installation is required.
  • Standard HTML First: Build interactive interfaces primarily with HTML attributes instead of large JavaScript frameworks.
  • HTMX Attribute Testing: Practice hx-get, hx-post, hx-target, hx-swap, hx-trigger, and other supported attributes.
  • Dynamic Content Replacement: Experiment with updating specific elements instead of reloading an entire page.
  • Hypermedia-Driven UI Testing: Learn how server responses can update targeted parts of an interface.
  • Custom HTML & CSS: Combine HTMX behavior with normal HTML elements and your own styling.
  • Dark & Light Mode: Switch the Code Editor theme for more comfortable development.
  • Instant Visual Preview: Click Run and quickly inspect the rendered result.
  • Output Controls: Copy, download, or clear the generated result directly from the Output panel.
1. How do I use HTMX attributes like hx-get and hx-target here?

Add HTMX attributes directly to standard HTML elements. For example:

hx-get="/message" tells HTMX to make a GET request when the button is triggered, while hx-target="#result" tells it where to place the returned HTML.

You can also change the swap behavior:

A real hx-get request still needs a reachable endpoint or a response simulation provided by the playground.

No. The playground is configured with HTMX library support, so supported HTMX attributes can be tested without manually adding a CDN script.

For example:

For a production website, you should still load or install the HTMX version required by your actual application.

Yes. It is useful for learning how HTMX uses HTML attributes to send requests and replace targeted page content.

For example:

This pattern demonstrates how a form can submit data and update only the #status element with the returned HTML. Actual network requests require a reachable backend endpoint or a mock-response feature in the playground.

Yes. HTMX is designed to work directly with regular HTML, so you can combine semantic markup, forms, buttons, inputs, and custom CSS with HTMX attributes.

If your playground includes mock or simulated server responses, you can use them to practice request-and-swap behavior without running your own backend. Otherwise, real hx-get and hx-post operations need an accessible server endpoint.

 

The Online HTMX Compiler / Playground is useful for frontend and backend developers, web designers, and students who want to learn HTMX attributes, hypermedia interactions, partial page updates, and HTML-first web development without setting up a complete local project.