### HTML Input Live Preview

HTML Code_\<header\> \<h1\>Welcome to My Site\</h1\> \<nav\> \<a href="#home"\>Home\</a\> \<a href="#about"\>About\</a\> \</nav\> \</header\> \<main\> \<h2\>Main Content\</h2\> \<button\>Click Me\</button\> \</main\>_

Analyze Accessibility

### Screen Reader Output & PreviewLive

Screen Reader Output  HTML PreviewLive

Run analysis to see screen reader output

# Screen Reader Preview - Accessibility Testing Tool

Inspect an approximate summary of selected HTML semantics. It is not the browser's accessibility tree or an actual screen reader.

## Key Features

#### Screen Reader Simulation

Review approximate output; announcements vary by browser and assistive technology.

#### Accessibility Tree

Visualize semantic structure

#### ARIA Support

Analyze ARIA labels and descriptions

#### Export Reports

Download accessibility tree as JSON

## What is Screen Reader Preview?

Screen Reader Preview summarizes selected elements in pasted HTML to help identify markup to review. Its output is an approximation, not the browser's accessibility tree or a faithful simulation of a particular screen reader. Test with real assistive technology and keyboard navigation before drawing accessibility conclusions.

A button without a useful accessible name can be difficult to understand, even if it is visible on screen. Review the names and order in context, then test actual interaction. To identify a few common markup issues, try the [WCAG HTML Accessibility Checker](https://www.toolcomb.com/wcag-checker); neither tool alone establishes compliance.

### How to Use

1. Paste your HTML code into the input area
2. Click "Analyze Accessibility"
3. Review the screen reader output
4. Check the HTML preview to see visual rendering
5. Export the accessibility tree for documentation

### What Gets Analyzed

#### Semantic Elements

Headings, landmarks, buttons, links, and form controls

#### ARIA Attributes

Labels, descriptions, roles, and other ARIA properties

#### Navigation Structure

Heading hierarchy, landmarks, and navigation order

#### Content Hierarchy

Text content and how it's organized in the accessibility tree

### Frequently Asked Questions

#### What is a screen reader?

A screen reader is assistive technology that reads web content aloud for visually impaired users.

#### What is an accessibility tree?

A browser accessibility tree exposes accessibility information to assistive technology. This tool shows an approximation from pasted HTML, not the browser's actual tree.

#### How do ARIA labels help?

ARIA labels provide additional context that screen readers announce to users.

#### Can I test with real screen readers?

This tool provides an approximation only. Test the actual page with screen readers such as NVDA, JAWS or VoiceOver, as well as keyboard navigation.

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### Related guides

Read the how-to, then come back to this tool when you are ready to run it locally.

- [A Practical WCAG Checklist You Can Run in the Browser Accessible names, contrast, and structure checks you can run while you build.](https://www.toolcomb.com/blog/practical-wcag-checklist-in-the-browser)
- [How Screen Readers Interpret Your HTML Headings, labels, and alt text as a screen reader would announce them.](https://www.toolcomb.com/blog/how-screen-readers-interpret-html)
- [Best CSS and Frontend Design Tools Color palettes, CSS animation previews, favicons, patterns, bundle size, and screen-reader checks - all in the browser.](https://www.toolcomb.com/blog/best-css-and-frontend-design-tools)

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