Free Accessibility Tools for Developers
19 free tools for shipping accessible, branded products: PDF accessibility checker, ARIA validator, WCAG 2.2 checklist, focus order visualizer, screen reader simulator, AI alt text generator, AI accessibility fixer, embeddable badge, and more. Built for developers using v0, Lovable, Bolt, and Claude Code. No sign-up, completely free.
Free PDF Accessibility Checker
Upload any PDF and get an instant WCAG 2.1 AA accessibility report. Checks tagged structure, alt text, language, reading order, bookmarks, and PDF/UA compliance. Runs entirely in your browser.
ARIA Validator for AI-Generated Code
Paste HTML or JSX and catch invalid ARIA roles, hallucinated attributes, missing labels, and the exact mistakes v0, Lovable, Bolt, and Claude Code make. Validates against ARIA 1.2 spec.
Interactive WCAG 2.2 Checklist
All 50 Level A and AA success criteria with plain-language summaries and quick tests. Saves your progress in your browser. Filter by principle, level, or "new in 2.2".
Color Palette Validator
Paste a JSON, CSS variables, or Tailwind config. Get a complete WCAG contrast matrix for every foreground/background combination. Built for design system teams.
Color Contrast Checker for Tailwind CSS
Check color contrast ratios between any two Tailwind CSS colors. Instantly see WCAG 2.1 AA/AAA compliance for normal text, large text, and UI components. Copy class names with one click.
Website Accessibility & ADA Compliance Checker
Paste any URL and get a WCAG 2.1 accessibility scorecard. Checks heading structure, alt text, ARIA, keyboard navigation, color contrast, and ADA compliance across your entire page.
WCAG & ADA Compliance Checker
Run a detailed WCAG 2.1 and ADA compliance audit against any page. Get a pass/fail breakdown by individual success criterion, grouped by POUR principles, with fix suggestions.
Tailwind CSS Color Palette Generator
Generate an accessible Tailwind CSS color palette where every shade passes WCAG AA contrast. Pick a color family or custom hue and export to tailwind.config.js or CSS variables.
Tailwind Theme Preview
Input your brand colors and fonts. See a live CRM rendered with your brand. Export a Tailwind v4 @theme block or DTCG-compatible JSON design tokens.
Tailwind Palette Generator
Pick a brand color, get the full 50-950 shade scale with live preview. Copy as Tailwind v3 config, Tailwind v4 @theme, or DTCG JSON tokens.
Shadcn Theme Generator
Pick a primary color and radius. See shadcn/ui components render live with your theme. Copy the CSS variables straight into your globals.css. Works with Tailwind v3 and v4.
SaaS MVP Screen Calculator
Pick your app type and get a tailored checklist of every screen you need to launch. See which screens are already built in our templates — and how much time you save by starting with one.
Focus Order Visualizer
Enter any URL or paste HTML to visualize keyboard tab order. See every focusable element numbered in sequence, detect positive tabindex, hidden-but-focusable elements, and missing skip links.
Screen Reader Simulator
Preview how a screen reader announces your page without installing one. See a sequential transcript, listen with text-to-speech, catch missing alt text, empty links, and unlabeled form fields.
Alt Text Generator
Guided alt text writer with WCAG templates. Select the image type, fill in structured fields, and get properly formatted alt text. Runs entirely in your browser — no sign-up, no limits.
Accessibility Fixer
Paste React, HTML, Vue, or Svelte code and get WCAG 2.1 AA issues fixed instantly with explanations. See a side-by-side diff and download a patch file. Runs in your browser.
Embeddable Accessibility Badge
Add a dynamic accessibility score badge to your README, website, or docs. Like shields.io, but for WCAG compliance. Auto-updates every 24 hours.
Project Cost Estimator
Input your app type and screen count. Get an estimated build cost from scratch vs starting with a production-ready template. See how much time and money you save.
Accessibility Remediation Calculator
Estimate how much it costs to retrofit WCAG AA compliance on an existing app. Compare against starting with accessible components from day one.
WCAG Compliance Report Generator
Run a WCAG audit and export a branded PDF scorecard you can share with your compliance team or include in procurement docs.
Why we built these color contrast and accessibility tools
Accessibility shouldn't be an afterthought you bolt on before launch. But most teams treat it that way because the tooling makes it hard to check as you go. We kept context-switching between axe DevTools, random color contrast checkers, and WCAG spec documents, so we started building the tools we actually wanted in our workflow.
The color contrast checker lets you test any two Tailwind CSS colors against WCAG 2.1 ratios instantly. The website accessibility checker audits any URL across 8 categories. The WCAG and ADA compliance checker gives you a per-criterion pass/fail report. And the color palette generator creates full Tailwind palettes where every shade passes WCAG AA contrast.
Every tool here runs entirely in your browser. Nothing is sent to a server, there's no sign-up, and there are no ads. Check contrast ratios, audit ADA compliance, generate accessible palettes, and get back to shipping. If you have a tool idea that would save you time, let us know.
Frequently Asked Questions
Common questions about our free color contrast checker, accessibility tools, and WCAG compliance.
Building with accessibility in mind?
Our business apps ship WCAG-AA compliant out of the box. Contrast-checked, keyboard-tested, screen-reader friendly.
Browse Business Apps