These web accessibility guides explain, in plain language, how to make a website usable for people with disabilities and how to meet WCAG 2.1 AA — the standard U.S. courts apply under the ADA. Use them to understand the rules, fix real issues, and decide what to handle yourself versus hand to a specialist.
We built this hub for small business owners, not engineers. Each guide stays practical: what the rule is, why it matters, how to test it, and how to fix it for good — through manual remediation, not an overlay widget that papers over broken code. Below, the guides are grouped into four themes so you can start wherever your questions are.
How to use this guide library
Most people arrive here for one of three reasons: you got a demand letter and need to act fast, you’re being proactive after hearing about ADA website lawsuits, or you simply want your site to work for everyone. Whatever brought you, the path is the same.
- Learn the standard. Read WCAG explained for business owners so the rest of these guides make sense. WCAG is organized around four principles — POUR (Perceivable, Operable, Understandable, Robust) — and three conformance levels (A, AA, AAA). AA is the practical target.
- Find your real problems. Follow how to do an accessibility audit to run a first-pass check, or run a free scan to get a quick read.
- Fix what you can; flag the rest. The issue-level how-tos below cover the fixes a non-developer can often make. For anything involving ARIA, focus order, or screen-reader behavior, bring in a specialist.
A quick word on scope: these guides are educational. They map tightly to WCAG 2.1 AA — the same standard the Department of Justice (DOJ) points to — but they are not legal advice. If you’re facing a lawsuit or a demand letter, talk to an attorney.
Theme 1 — Standards & the law
Start here if you don’t yet know what “accessible” officially means. These guides explain the rulebook (WCAG), how it connects to the ADA, and where federal standards like Section 508 fit.
| Guide | What it answers |
|---|---|
| WCAG explained for business owners | What WCAG is and why it’s the de-facto legal standard |
| WCAG 2.1 AA explained | The exact success criteria most businesses must meet |
| WCAG 2.2 vs 2.1 | What changed in the newest version, and whether it applies to you |
| POUR principles | The four ideas every WCAG rule comes from |
| WCAG conformance levels (A/AA/AAA) | Why AA is the target — and AAA usually isn’t |
For the legal side — how ADA Title III has been applied to websites, and how it differs from Section 508 (which governs federal agencies) — see our deeper explainers on ADA Title III and websites and ADA vs Section 508 vs WCAG. The short version: there’s no separate federal “website rule” for private businesses yet, but courts treat WCAG 2.1 AA as the benchmark, and thousands of ADA web lawsuits are filed each year, most against small and mid-sized businesses.
Authoritative sources worth bookmarking: the W3C Web Accessibility Initiative, the official ADA.gov site, and Section508.gov for the federal standard.
Theme 2 — Issues & how-tos (the actual fixes)
This is where most owners spend their time. These guides each tackle one common failure that shows up in audits — what it is, how to test it, and how to fix it. Many of these you can do yourself.
- Alt text best practices — Writing text alternatives so screen readers can describe your images. The single most common WCAG failure on the web.
- Color contrast requirements — The exact ratios (4.5:1 for normal text) and how to check your palette.
- Accessible forms — Labels, error messages, and required-field handling that don’t trap people.
- ARIA labels and roles — When ARIA helps, when it hurts, and the “no ARIA is better than bad ARIA” rule.
- Heading structure and landmarks — Using H1–H6 and HTML landmarks so assistive tech can navigate your page.
- Accessible PDFs — Making menus, brochures, and forms in PDF format actually readable.
- Accessible navigation and focus management — Visible focus, logical order, and skip links.
When you’re ready to put it all together, two how-tos bridge the gap from “I found problems” to “it’s fixed”:
- How to make a website ADA compliant — The full sequence, start to finish.
- How to do an accessibility audit — How to test properly before you fix anything.
A note on testing method: automated vs manual accessibility testing explains why scanners alone aren’t enough. Automated tools catch an estimated 30–40% of issues; the rest — keyboard traps, illogical reading order, alt text that’s technically present but meaningless — only surface when a human operates the site with a screen reader and keyboard navigation. That’s why a credible website accessibility audit always pairs both.
What you can fix yourself vs. what needs a specialist
| Often DIY-friendly | Usually needs a specialist |
|---|---|
| Alt text on images | ARIA roles and live regions |
| Color contrast in your palette | Keyboard focus order in custom widgets |
| Visible link text and headings | Screen-reader announcement logic |
| Basic form labels | Accessible dynamic content (modals, carousels) |
| Page titles and language attribute | Remediating a third-party theme or plugin |
If the right column describes your site, that’s normal — and it’s exactly what accessibility remediation handles.
Theme 3 — Assistive technology & how disabled people use the web
You can’t fix what you can’t picture. These guides show how real people interact with your site using assistive technology, so the fixes in Theme 2 stop feeling abstract.
- Screen readers explained — How NVDA, JAWS, and VoiceOver turn your page into speech, and what breaks them.
- Keyboard navigation and accessibility — Why many users never touch a mouse, and what a keyboard-only visit reveals.
- How people with disabilities use the web — A tour of the tools and techniques behind the standards.
- Types of disabilities and web barriers — Vision, motor, hearing, and cognitive needs, mapped to the barriers your site might create.
This is the most underrated theme. Spending twenty minutes operating your own site with a screen reader closed-eyes, or unplugging your mouse, teaches more than any checklist. WebAIM’s regular screen reader user surveys are a good reality check on how people actually browse.
Theme 4 — The business value of accessibility
Accessibility isn’t just risk avoidance. These guides cover the upside — and they’re useful when you need to justify the work to a partner, board, or yourself.
- How accessibility improves SEO — The large overlap between accessible markup and what search engines reward.
- Benefits of an accessible website — Reach, conversion, brand, and legal protection, in one place.
There’s a hard number behind the soft case: roughly one in four U.S. adults lives with a disability. An inaccessible site quietly turns away a meaningful share of your market — and the same structural fixes that welcome them (clean headings, real labels, fast keyboard paths) tend to lift usability and search performance for everyone. Accessible markup gives search engines the same clean signals it gives a screen reader, which is why an accessibility project so often pays for itself in traffic and conversions, not just risk reduction.
Why “manual remediation,” not an overlay
You’ll see ads promising instant ADA compliance from a single line of JavaScript — an accessibility overlay. Every guide here points the other way, and it’s worth saying plainly why.
An overlay injects a widget on top of your existing site. It does not change the underlying HTML, ARIA, or content that assistive technology actually reads. Independent testing has repeatedly shown overlays introduce their own bugs, and — critically — businesses running the best-known overlay products have still been hit with demand letters and lawsuits. Courts have not accepted an overlay as a defense. If you’re weighing one, read do accessibility overlays work? before you spend a dollar.
The durable path is manual remediation: a human audits your site against WCAG 2.1 AA, then fixes the real problems in the code — semantic structure, labels, contrast, focus order, forms. That’s what makes a site conform, and what holds up. It’s also what every how-to in this library is teaching you to do. The work is also documentable: a proper remediation can end in an accessibility statement and, when a buyer or partner asks, a VPAT (Voluntary Product Accessibility Template) that records exactly how your site measures against each criterion — something no overlay can produce.
Where to go next
- Just want a status check? Run a free accessibility scan to see how your site measures against WCAG 2.1 AA.
- Ready to learn the standard? Start with WCAG explained for business owners.
- Want a real audit? A professional website accessibility audit combines automated and manual testing and ends with a prioritized fix list.
- Already know you need fixes? See how accessibility remediation works.
Pick the theme that matches your question and dig in. Every guide is written to leave you with something you can actually do — and when a problem is bigger than a how-to, Curbcut fixes it by hand, the way that lasts.