8 Free Web Accessibility & Design QA Tools Every Developer Needs in 2026

Did you know 98% of the world's top one million websites fail at least one basic accessibility test? That's not because developers don't care — it's because good accessibility tooling has historically been expensive, clunky, or required a paid subscription. That changes now.

ElysiaTools gives you a complete suite of free web accessibility and design QA tools that run directly in your browser. No sign-up. No API key. No rate limits. Just open the tool and go. Here are the eight you should bookmark today.

1. Accessibility Checker — Scan Any Page for WCAG Issues

This is the centerpiece of the accessibility toolkit. Drop in a block of HTML, paste a URL, or upload a design mockup image — and get back a prioritized report of accessibility issues with exact fix-ready code.

The tool checks five major categories:

Images — catches missing alt text and empty alt="" that should be decorative
Links — detects links with no visible text or aria-label
Forms — finds form controls missing an associated <label>
Keyboard — flags positive tabindex values and custom clickable elements without keyboard support
Color contrast — calculates inline style contrast ratios against WCAG AA (4.5:1) or AAA (7:1) thresholds

The output is a structured report grouped by severity: Critical, Warning, and Info — so you always know what to tackle first. Each issue includes the exact CSS selector, a plain-English explanation, and a code example showing the fix.

Try it: Accessibility Checker

2. Color Accessibility Checker — Instant WCAG Contrast Validation

Before you ship a design, check your foreground/background color pairs. This tool takes any two HEX colors and spits out the contrast ratio, then tells you whether you pass WCAG AA and AAA for both normal text (4.5:1 / 7:1) and large text (3:1 / 4.5:1).

This is especially useful during design reviews. Designers often eyeball color choices; this tool makes the pass/fail official in seconds.

Try it: Color Accessibility Checker

3. PII Finder — Discover Sensitive Data Before It Ships

Personal Identifiable Information (PII) leaks are one of the most common causes of data breaches and compliance violations (GDPR, HIPAA, etc.). PII Finder scans any text or log output and flags potential PII — names, addresses, phone numbers, email addresses, credit card patterns, and more — with annotated positions so you can redact or mask them confidently.

In other words, it tells you exactly what accidentally ended up in your logs.

Try it: PII Finder

4. Strong Password Validator — Know Exactly How Strong (or Weak) Your Passwords Are

Most password strength meters are black boxes. This one gives you a 100-point score and breaks down exactly which requirements pass or fail: length, uppercase, lowercase, numbers, special characters, common pattern detection, and dictionary word checks.

It's useful both as a developer testing password policy implementations and as an end user validating your own passwords before reuse.

Try it: Strong Password Validator

5. Credit Card Validator — Luhn Checksum + Card Type Detection

Don't let bad card numbers reach your payment processor. This tool validates the format and runs the Luhn algorithm checksum against card numbers, correctly identifying Visa, MasterCard, American Express, UnionPay, JCB, Diners Club, and Maestro cards.

It's a quick pre-flight check before you write a single line of payment integration code.

Try it: Credit Card Validator

6. JSON Schema Validator — Catch Invalid API Payloads Before They Reach Production

Building or consuming REST APIs? JSON Schema Validator lets you paste your schema and your payload, then validates against any JSON Schema draft (4, 6, 7, 2019-09, 2020-12). It runs in all-errors mode by default, so you see every problem at once instead of fixing one at a time.

This is the tool you reach for when you want to verify a webhook payload, test a request body against your OpenAPI contract, or debug why your schema validation is failing.

Try it: JSON Schema Validator

7. Slug Validator — Clean URL Strings Every Time

SEO-friendly slugs matter for readability and sharing. This tool validates that a slug uses only lowercase letters, numbers, and hyphens — with no spaces, special characters, or Unicode surprises. It also auto-suggests a clean version if your input is invalid.

Broken slugs get indexed wrong and hurt your search rankings. This takes 2 seconds to check.

Try it: Slug Validator

8. Webhook Debugger & Relay — Capture, Inspect, and Replay Webhooks Locally

Building webhook integrations is painful because you can't easily inspect what the sender is actually posting. This tool generates a unique capture URL, lets you inspect incoming requests (headers, body, timing), validates HMAC signatures, and replay payloads to your local server or staging endpoint.

It's essentially ngrok for webhooks — but free and without requiring an account.

Try it: Webhook Debugger & Relay

The Unresolved Problem

These tools catch a lot — but the hardest part of accessibility is still human: writing meaningful alt text for complex images, understanding when an image is truly decorative versus informative, and making sure keyboard navigation feels natural rather than bolted-on. Automated tools find the symptoms. The diagnosis still takes a thoughtful developer who understands the people using what they build.

Bookmark these eight tools and make them part of your pre-commit checklist. Your future users — and your compliance auditor — will thank you.

Explore all tools: elysiatools.com