The castara.io Guide · ADA & Web Accessibility
ADA web accessibility, explained for the people who run the business.
Plain-English, cited, regularly-updated guides on what the ADA actually requires of your website — and what to do about it. No jargon, no fear-selling, no legalese.
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ADA Website Compliance, in Plain English
What the law actually requires, whether it applies to your business, what a demand letter really costs — with an interactive risk calculator — and how to fix your site for good.
Read the guideJump straight to what you need
Eight entry points into the guide — read the whole thing, or go straight to the question on your mind.
Does the ADA apply to me?
Who is actually covered — and why most local businesses are.
What is WCAG 2.2 AA?
The standard the legal world treats as the bar, in four ideas.
Conformance vs. compliance
Why "100% ADA compliant" is a promise no one can keep.
The demand-letter risk
Why most claims never reach a courtroom — and still cost you.
Estimate your exposure →
Interactive risk & cost calculator. Six questions, runs in your browser.
The common violations
The handful of failures scanners flag again and again.
Do overlays work?
Short answer: no. The longer answer, with the receipts.
How to actually fix it
The honest path: audit, remediate, document, maintain.
More in the library
New guides added regularlyFocused guides that go deep on one question each — read them on their own, or as companions to the main compliance guide.
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Got a demand letter? A 48-hour playbook
What to do — and what not to do — in the first two days.
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The WCAG 2.2 AA checklist · interactive
Tick off the Level AA essentials in plain language; progress saves.
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Accessibility statement generator · free tool
Fill in your details, copy a ready-to-publish statement.
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ADA web lawsuits, state by state
Where filings cluster, why, and what it means for your risk.
When you're ready to stop worrying about it
Reading about it is step one. castara.io is step two.
We build you a fast, WCAG 2.2 AA website, publish the audit on your own domain, and keep it conformant every time something changes — so the scanners that trigger demand letters find a documented, defensible site instead of an easy target. Start with a free review of your current site.
7-day launchAudit published on your domainWCAG 2.2 AACancel anytime