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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →For a useful HTML-lint baseline, enable checks for document language and metadata, accessible names and labels, valid tag structure, unique IDs, and agreed team conventions. Pair source linting with an HTML validator and checks of the rendered interface: a clean lint report does not prove that a page conforms to WCAG or works well with assistive technology.
What HTML linting can—and cannot—tell you
A source linter checks code patterns selected by its ruleset. Depending on the tool and configuration, it can flag missing attributes, questionable element use, duplicate IDs, or inconsistent formatting. Those findings are useful prompts for developers, but they do not establish how the completed page behaves in a browser.
Validation asks whether markup follows the relevant technology specification. W3C WAI describes validation as a way to reduce ambiguity, while cautioning that it does not necessarily test full conformance. Its G134 technique describes checking pages with a validating parser. W3C techniques are examples, not standalone requirements; H74 addresses correctly specified tags and parsing checks.
Accessibility also depends on context and runtime behavior. A checker may detect that an image lacks an alt attribute, but cannot reliably decide whether supplied alternative text conveys the image’s purpose. Static checks cannot cover every interactive state or demonstrate assistive-technology usability.
#1 Best Overall
Build a baseline by purpose
Document language and metadata
Consider enabling checks for an HTML5 doctype, a document language on the html element, character encoding metadata, and a nonempty page title. HTMLHint lists rules including doctype-first, doctype-html5, html-lang-require, meta-charset-require, and title-require in its rule catalog. A language declaration helps user agents and assistive technologies interpret text; a linter can check for its presence, not whether the declared language matches all page content.
Viewport and description metadata may also be project requirements. HTMLHint includes meta-viewport-require and meta-description-require. Treat the description as an SEO or publishing convention, not an accessibility requirement; require such metadata only where it fits the project.
Rank #2
Semantics, labels, and accessible names
Check that form controls have labels and that embedded frames have accessible names. For images, flag missing alt attributes, while allowing an empty value for decorative images when appropriate. The HTMLHint catalog includes checks for input labels and iframe names; eslint-plugin-jsx-a11y documents checks such as alt-text, anchor-has-content, iframe-has-title, and label/control rules.
Prefer native semantic elements when they fit the function: they provide browser and assistive-technology semantics that a generic element does not gain merely by looking interactive. For JSX projects, accessibility rules can also flag clickable non-interactive elements without keyboard support and anchors that do not function as navigable links. Review each finding in context rather than silencing it automatically.
Rank #3
- Used Book in Good Condition
Structure and validity
Enable checks for required tag pairing, valid nesting, obsolete elements, empty required src values, and unique IDs. HTMLHint lists tag-pair, tag-no-obsolete, src-not-empty, and id-unique. Duplicate IDs can undermine fragment links and label associations; malformed nesting or tag pairing can create parsing problems. W3C’s H74 technique describes checking the applicable opening and closing tags and their placement.
Do not assume your selected lint rules cover every markup error. Run a standards validator as a separate check when you need to test markup against HTML rules; W3C WAI’s G134 technique explains this role and its limits.
Team consistency
Formatting rules—such as lowercase tag names, predictable indentation, or project-required attributes—can make a codebase easier to maintain when the team agrees on them. They are conventions, not universal accessibility criteria. HTMLHint lets teams configure and extend rules; consult its options documentation before encoding local policy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choose tooling that understands your source
| Source and need | Suitable starting point | Configuration considerations |
|---|---|---|
| Plain HTML or HTML-oriented source checks | HTMLHint rule catalog | Select the structural, metadata, and convention rules your project needs; configure or extend them as appropriate. Rules and options. |
| React JSX accessibility prompts | eslint-plugin-jsx-a11y | Check how custom components and attributes are represented so the checker can interpret project abstractions. Project documentation. |
| Markup conformance checks | A standards validator | Use it alongside linting; validation and a clean lint report answer overlapping but distinct questions. W3C WAI G134. |
These are complementary roles, not a performance ranking. Choose based on the source format, the rules you want, configuration effort, custom-component support, and whether the wider workflow includes browser-rendered checks. The JSX accessibility plugin specifically recommends rendered-DOM checks and assistive-technology testing as part of a broader process.
Best Value
Adopt the rules without drowning in noise
- Identify the source format. Decide whether the project is plain HTML, templates, or JSX, then use tooling that can parse that source correctly.
- Start with high-value prompts. Enable checks for document language, labels, alternative-text presence, usable links, named frames, sound tag structure, and unique IDs.
- Add validation separately. Run a standards validator to catch markup errors that your chosen lint rules do not cover.
- Introduce conventions gradually. Review noisy findings, adjust rule configuration, and document narrow exceptions rather than disabling broad categories without review.
- Check the rendered experience. Test interactive states in the browser and use assistive technology. Linting is one step in accessibility work, not a substitute for evaluating the page people use.
For JSX applications, map custom components and attributes where the plugin offers configuration so checks can account for framework abstractions. Confirm that exceptions reflect real component behavior; otherwise a rule may miss an issue or report a misleading one.
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