Modal preview & code
Configure options and click Generate// generate modal dialog markup with aria in one click
Generate accessible modal dialog markup with overlay, close button, and ARIA attributes. Customize size, animation, and style — copy clean HTML and CSS instantly.
Modal preview & code
Configure options and click GenerateSet your modal title, body text, size, animation, and toggle options like close button and footer buttons.
Click Generate Modal to produce the HTML, CSS, and JavaScript output with full ARIA attributes.
Preview the live modal, then copy each code block individually into your project.
A modal generator that produces semantic HTML5 dialog markup with proper ARIA roles, focus trapping, keyboard navigation, and animated overlays — ready to paste into any web project without dependencies.
The generator adds role="dialog", aria-modal="true", aria-labelledby pointing to the title, and aria-describedby pointing to the body. The close button includes aria-label="Close modal". These follow WCAG 2.1 guidelines for accessible dialogs.
No. All generated HTML, CSS, and JavaScript is completely vanilla — no jQuery, Bootstrap, or any library required. You can drop it into any project regardless of your tech stack.
When enabled, the JavaScript intercepts Tab and Shift+Tab key presses and cycles focus only among interactive elements inside the modal (buttons, inputs, links). This prevents keyboard users from accidentally tabbing behind the overlay.
Absolutely. The generated HTML is a template — replace the body paragraph with any content: forms, images, tables, video embeds, or custom components. The structure and ARIA wiring stay intact.
The generated JavaScript exposes a simple openModal() function. Attach it to any trigger: <button onclick="openModal()">Open</button>. You can also call it programmatically from other scripts.
Yes. The CSS includes responsive breakpoints that make the modal full-width on small screens and adds appropriate padding. The touch target for the close button is also sized to meet WCAG minimum tap target requirements.
Five animations are available: Fade (opacity transition), Slide Up (translate + fade from below), Slide Down (from above), Zoom In (scale + fade), and Flip (3D perspective flip). Select "None" for an instant display with no animation.
Yes — generate each modal separately and rename the IDs in the output (e.g. modal-1, modal-2). Update the corresponding JavaScript variable names accordingly. The logic is self-contained per modal instance.
A modal dialog generator is an online tool that produces ready-to-use HTML, CSS, and JavaScript code for modal popup windows. Instead of writing dialog markup from scratch — and potentially missing critical ARIA attributes — you configure your modal visually and receive clean, production-grade code in seconds. This tool generates modals with proper semantic structure, accessibility features, smooth animations, and a JavaScript controller, all without requiring any external libraries.
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Modal dialogs are one of the most commonly misimplemented UI patterns on the web. A visually functional modal can still be completely unusable for keyboard-only users and screen reader users if the correct ARIA roles are missing. The WCAG 2.1 standard specifies several requirements for dialogs: they must announce themselves to assistive technology with role="dialog", signal that background content is inert with aria-modal="true", and provide a descriptive label via aria-labelledby. Focus must be moved into the modal when it opens and returned to the trigger element when it closes.
Beyond ARIA, keyboard navigation must work correctly. Users should be able to close the modal with the Escape key, and the Tab key should cycle only through interactive elements inside the modal — not behind the overlay. This is called focus trapping, and implementing it correctly requires careful DOM traversal. This generator handles all of these requirements automatically so you can focus on your content.
A well-structured modal consists of several distinct layers. The outermost element is the overlay container — a fixed-position div that covers the entire viewport. Inside it sits the backdrop (a semi-transparent dark layer) and the modal panel itself. The panel is divided into three semantic regions: a header containing the title and close button, a scrollable body for content, and an optional footer with action buttons.
Here is the core semantic hierarchy the generator produces:
role="dialog", aria-modal="true", aria-labelledbyaria-labelVisual transitions make modals feel polished and intentional rather than abrupt. The generator supports five animation styles, each implemented with pure CSS keyframes and transitions:
opacity: 0 to opacity: 1. Simple and universally appropriate for any context.All animations respect the prefers-reduced-motion media query. Users who have opted into reduced motion in their OS settings will see instant transitions instead of animated ones, ensuring your modal remains accessible to users with vestibular disorders.
Modal size should match the complexity of its content. Using a large modal for a two-line confirmation message wastes screen space and reduces focus. Conversely, cramming a multi-step form into a small modal creates a poor experience. The generator offers five sizes:
Even with a generated starting point, there are several best practices worth keeping in mind. First, avoid opening modals automatically on page load — users find unexpected interruptions intrusive and it hurts accessibility. Second, always return focus to the trigger element when closing; screen reader users need to know where they are in the document after the dialog disappears. Third, do not rely solely on the overlay click to close the modal — always provide an explicit close button for mouse, touch, and keyboard users alike. Finally, avoid nesting modals inside each other. Stacked dialogs confuse focus management and are nearly impossible to navigate with a keyboard or screen reader.
After generating your modal, paste the HTML directly before the closing </body> tag of your page. Add the CSS to your main stylesheet or in a <style> block in the <head>. Place the JavaScript in your existing JS bundle or in a <script> tag at the bottom of the body. To trigger the modal, call openModal() from any event handler — a button click, a form submission, or a timed event. The generated code is completely self-contained and will not conflict with most existing styles or scripts.