Accessibility Checker

Paste HTML to catch common accessibility issues like missing alt text, unlabeled inputs, and heading jumps. Run basic HTML accessibility heuristics (alt, labels

Introduction

Accessibility Checker is a free, browser-based utility in our Validator Tools collection. Paste HTML to catch common accessibility issues like missing alt text, unlabeled inputs, and heading jumps. Accessibility Checker performs lightweight WCAG-oriented HTML heuristics in the browser. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include alt & labels.

Features

Alt & labels
Heading order
Lang/title checks

How to use

1
Paste HTML.
2
Review the report.

Example

Form

Input

<input> without label

Output

error in report

Benefits

Run A11y Check entirely in the browser with no signup or installation.
Keep sensitive sample data private — processing never leaves your device.
Alt & labels
Heading order
Lang/title checks
Pair it with Contrast Checker and Lite Perf when your workflow needs adjacent utilities.

FAQs

No - use axe/Lighthouse for comprehensive testing.

Not covered here; see Color Contrast Checker.

No.

Yes. A11y Check on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.

No. A11y Check runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.

Paste HTML to catch common accessibility issues like missing alt text, unlabeled inputs, and heading jumps. It fits everyday validator tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.

Core capabilities include: Alt & labels; Heading order; Lang/title checks.

Developers often pair A11y Check with Contrast Checker, Lite Perf, HTML Formatter. Open Related tools on this page for quick links.