How do I review AI-generated HTML before publishing it? Treat it as a draft, not as finished or trustworthy code. Check its content, markup, accessibility, security, and behavior in the destination where it will appear; each check catches different problems, and no single pass certifies the rest.
Can I trust AI-generated HTML?
Not without reviewing it. Generated HTML can contain incorrect or misleading text, broken links, invalid markup, inaccessible structure, risky code, or layout and behavior that change when a CMS or application processes it. A validator can identify certain markup problems, but it cannot establish that the content is accurate, the page is accessible to its intended audience, or the final publication behaves as intended.
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Keep the review dimensions separate: editorial correctness, markup validity, accessibility, security, and rendered behavior. A pass in one area is not approval in another.
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1. Check the content against the request and source
Compare the generated page with the brief, source material, and publishing requirements. Confirm that claims are accurate, links lead where they should, labels describe the right actions, and headings reflect the page’s actual structure. Look for omissions, invented details, or wording that could mislead readers. These are editorial decisions; valid markup does not verify them.
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2. Validate the HTML
Paste or submit the document to the W3C Nu Html Checker, then review its errors and warnings in context. W3C technique H88 recommends checking that specification-defined elements and attributes are used as specified and that the page parses correctly. Its procedure says: “Check that the page can be parsed correctly, according to the rules of the specification.” See W3C WAI technique H88: Using HTML according to spec.
Fix genuine issues, but do not treat a clean result as a general approval or safety certificate. Validation tools help with some checks; deciding whether markup is used appropriately can require heuristic tools and human judgment.
3. Review accessibility for the page’s purpose
Use the relevant criteria in W3C’s WCAG 2.2 Quick Reference. Check whether the structure and headings make sense, controls have clear names and labels, non-text content has suitable alternatives, and information and functionality are available to assistive technologies. Where feasible, try keyboard interaction and review the page with the browsers and assistive technologies relevant to its audience.
Automated checks can flag potential issues, but they cannot establish that the whole experience works for people. WCAG conformance and support can vary with user agents, assistive technologies, language, and deployment context; W3C discusses this in Understanding WCAG 2.2 conformance.
4. Inspect security-sensitive code and content
Look for scripts, event handlers, dynamic insertion, embedded third-party resources, and untrusted content. If untrusted input is intended to appear as plain text, insert it as text rather than interpreting it as HTML. OWASP’s Web Frontend Security Cheat Sheet states: “The fundamental security rule is to never use innerHTML with untrusted data.” If the application genuinely needs to insert HTML, sanitize it with an appropriate library and review the specific context. See the OWASP Web Frontend Security Cheat Sheet.
5. Preview the actual publishing result
Open the page in the destination CMS or application and check it in the target browsers. Inspect layout, links, images, and interactive behavior, and look for changes introduced by the publishing system. Valid source markup alone does not show whether the rendered page matches the intended design or function.
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6. Record fixes and review the final version
Keep a concise record of issues found, changes made, and any known limitations that remain. After edits, rerun the checks relevant to those changes and have a responsible person approve the final output.
What a review tool can—and cannot—tell you
Choose checks by the job they perform rather than looking for a single tool that claims to “check AI HTML.” A markup validator addresses parsing and specification issues; accessibility review needs criteria-based checks and, where possible, human interaction testing; security review must consider code and data flows; and the final page needs inspection in its real publishing context. Keep evidence of both automated results and the checks a person performed.
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HTML-generating software is not automatically an accessibility guarantee. W3C’s ATAG overview explains that authoring-tool guidance addresses both the accessibility of authoring tools and their support for creating accessible content. ATAG 2.0 was published in 2015 and encourages use of the latest WCAG 2 version; it does not certify every output from a tool.
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