Key Facts
- Category
- Security & Validation
- Input Types
- textarea, text, select, checkbox
- Output Type
- html
- Sample Coverage
- 4
- API Ready
- Yes
Overview
The Screen Reader Simulation Tester helps developers and designers preview how their web pages sound to visually impaired users. By analyzing raw HTML or a live URL, it generates a simulated reading order and spoken semantics, highlighting accessibility gaps like missing ARIA labels, skipped heading levels, and unlabeled buttons before they reach production.
When to Use
- •Auditing web pages for accessibility compliance and semantic structure before deploying to production.
- •Debugging complex HTML forms to ensure all inputs, buttons, and controls have proper accessible names.
- •Verifying the heading hierarchy and landmark navigation of a layout to prevent screen reader confusion.
How It Works
- •Paste your raw HTML markup or provide a live page URL for the tool to inspect.
- •Select a screen reader preset (NVDA, JAWS, or VoiceOver) and toggle landmark summaries or fix suggestions.
- •The tool parses the document flow, extracting the likely spoken order of headings, links, forms, and images.
- •Review the generated report to identify missing alt text, skipped heading levels, and unlabeled controls.
Use Cases
Examples
1. Auditing a Marketing Signup Page
Frontend Developer- Background
- A new promotional landing page was built quickly, and the team needs to ensure visually impaired users can navigate the signup form.
- Problem
- Identifying missing labels and broken heading structures before the campaign launches.
- How to Use
- Paste the page's HTML into the input, select the VoiceOver preset, and enable 'Show Fix Suggestions'.
- Example Config
-
{ "preset": "VoiceOver", "includeLandmarkSummary": true, "showFixSuggestions": true } - Outcome
- The report reveals that the email input lacks an associated <label> and the submit button is empty, providing immediate fix suggestions to add aria-label attributes.
2. Checking Heading Hierarchy on a Live Article
Accessibility Auditor- Background
- An accessibility auditor is reviewing a client's blog to ensure screen reader users can easily jump between sections.
- Problem
- Verifying that the article uses a strict, logical heading outline without skipping levels.
- How to Use
- Enter the article's URL into the 'Page URL' field, select the NVDA preset, and run the simulation.
- Example Config
-
{ "pageUrl": "https://example.com/blog-post", "preset": "NVDA", "includeLandmarkSummary": false, "showFixSuggestions": true } - Outcome
- The tool extracts the document outline and flags a jump from <h1> directly to <h3>, allowing the auditor to recommend changing the <h3> to an <h2>.
Try with Samples
htmlRelated Hubs
FAQ
Is this a perfect replica of NVDA or VoiceOver?
No, this is a semantic simulation. It approximates the reading order and spoken output based on HTML semantics, but actual screen reader behavior may vary slightly depending on user settings and browser combinations.
Can it analyze dynamic content loaded via JavaScript?
The tool analyzes the HTML provided. If you use the URL input, dynamic client-side state that appears only after scripts run might not be captured. For dynamic states, paste the fully rendered HTML directly into the input.
What does the Screen Reader Preset option do?
The preset changes the phrasing style of the output to match the typical announcement patterns of NVDA, JAWS, or VoiceOver. The underlying semantic analysis and issue detection remain the same.
Why is my heading hierarchy flagged as an error?
Screen reader users rely on headings to navigate a page. The tool flags skipped levels (e.g., jumping from H1 directly to H3) because it breaks the logical document outline and makes navigation confusing.
How do I fix unlabeled buttons in the report?
If you enable 'Show Fix Suggestions', the tool will provide specific guidance. Typically, you need to add visible text inside the button, an aria-label, or an aria-labelledby attribute.