MicroTools

Form Accessibility Validator

Validate labels, aria attributes, required fields, and error messages in HTML forms.

About Form Accessibility Validator

Paste HTML form code and validate accessibility. Checks that every input has an associated label, required fields are marked, error messages use aria-describedby, fieldsets group related controls, and submit buttons have descriptive text.

How to Use

  1. 1Paste your HTML form code into the input area.
  2. 2The tool scans all form controls: input, select, textarea, button.
  3. 3Each issue is listed with element type, the problem, and a fix example.
  4. 4Warnings (low priority) are shown separately from errors (critical).
  5. 5Use the fixed code snippet shown next to each error to correct it.

Frequently Asked Questions

What makes a form accessible?
Every input needs a visible label linked via for/id or aria-labelledby. Required fields must be indicated (not just by color). Error messages should use aria-describedby to be announced by screen readers.
Is placeholder text enough instead of a label?
No. Placeholder text disappears when typing, is often low-contrast, and many screen readers do not treat it as a label. Always use a proper <label> element.
What is aria-describedby?
An ARIA attribute that links an input to a helper text or error message by ID. Screen readers read the linked text after the input label when the field is focused.
Do radio buttons and checkboxes need labels?
Yes — each individual control needs a label. Groups of related controls should also be wrapped in a <fieldset> with a <legend>.

Tool Info

Category
compliance
Usage
Unlimited

Related Tools

Heading Structure Auditor

Detect skipped levels, duplicate H1s, and broken heading hierarchy in HTML/Markdown.

Alt-Text Linter

Find missing, redundant, or low-quality alt text in your HTML instantly.

Keyboard Navigation Checklist

Generate a WCAG keyboard QA checklist for any UI component type.

More compliance tools

WCAG Contrast Checker

Check AA/AAA contrast ratio for any two colors. Get fix suggestions instantly.

Non-Text Contrast Checker

Validate 3:1 contrast for borders, icons, focus rings, and UI states.

Heading Structure Auditor

Detect skipped levels, duplicate H1s, and broken heading hierarchy in HTML/Markdown.

Link Text Quality Checker

Find "click here", duplicate links, and empty anchors that fail WCAG 2.4.4.