The best HTML linter depends on where you need feedback: HTMLHint is a direct CLI choice with VS Code diagnostics for open files; html-validate emphasizes project-local configuration shared by its CLI and VS Code extension; Markuplint adds documented GitHub Actions workflows, annotations, and gradual-adoption controls. For dependable team checks, use a project-installed linter and run it in CI rather than relying on an editor extension alone.
How to choose an HTML linter
Compare the workflow, not just the rule list. Before choosing, check whether the tool analyzes open editor files or scans a repository, how it handles your templates and component syntax, whether editor and CI use the same installed package and configuration, and what its CI output and migration controls provide.
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- Editor: Confirm support for the editor you actually use and whether diagnostics cover the current file, open files, or more.
- Project and CI: Check that the tool can run locally and in your build workflow with a shared configuration.
- Syntax: Verify parser or transformer support for the file types and versions in your project.
- Adoption: If you are linting an existing codebase, look for ways to introduce rules gradually rather than treating every existing warning as a new failure.
HTMLHint: a straightforward CLI and VS Code diagnostics
HTMLHint is a good fit when you want a configurable linter with a simple command-line workflow. Its project documentation describes running the CLI over files or directories and configuring rules through .htmlhintrc, a custom configuration, or rule options. See the HTMLHint project documentation.
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The VS Code extension has an important boundary: it reports diagnostics for open HTML files but does not search the project folder. An editor showing no warnings therefore does not establish that the rest of the repository has been checked. Run the CLI from a project script or CI to cover project files. Details are in the HTMLHint VS Code extension documentation.
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The HTMLHint project page states Node.js 22 or later as a prerequisite. This is the requirement specified by that page when reviewed; check its current documentation for updates before setup.
html-validate: align the project, CLI, and VS Code
Choose html-validate when a project-local installation and consistent results across team members are priorities. Its VS Code extension can use a local, global, or bundled package, but the documentation recommends installing the package locally so changes to global or bundled versions do not make editor warnings differ from the project’s expected checks. Its CLI and extension can use the same project configuration. Read the html-validate VS Code guide.
Vue and Markdown support can be enabled using transformers or plugins; do not assume those file types work without configuration. Check the official guide against the project’s actual file types and versions. The cited documentation does not establish a comparable minimum Node.js version here.
Markuplint: broader documented CI controls and parser options
Markuplint suits teams that need more than basic editor diagnostics: its documentation describes structural parent-child checks, selector-scoped rules, accessibility-related checks, and parser plugins for syntaxes including JSX, Vue, Svelte, Pug, PHP, Markdown, and MDX. Exact support still depends on the parser and project configuration. Start with the Markuplint homepage.
Its VS Code extension applies the recommended preset without project setup, while installing Markuplint as a development dependency lets a team run it through a package script or CI. The Markuplint CI guide documents GitHub Actions, inline GitHub annotations, JSON output, warning thresholds, and suppressions that can help teams adopt linting incrementally.
The Markuplint guides specify Node.js v24.0.0 or later. That is the requirement stated by the cited guide when reviewed, so verify current release documentation before installing. The Markuplint guides also discuss VS Code-based editors that support extensions; this should not be read as proof of native support in every editor.
Which linter fits each workflow?
| Tool | Editor workflow | Project and CI workflow | Best fit |
|---|---|---|---|
| HTMLHint | VS Code extension diagnoses open HTML files; it does not scan the project folder. | Install locally and use the CLI on files or directories; configure rules with .htmlhintrc, custom config, or rule options. |
A straightforward CLI and configurable checks when repository coverage is handled separately. |
| html-validate | VS Code extension can use a local, global, or bundled package. | Project-local installation and configuration can keep CLI and extension results aligned; transformers or plugins enable Vue and Markdown. | Teams prioritizing shared project configuration and configurable language support. |
| Markuplint | VS Code extension applies the recommended preset without project setup. | Development dependency can run in a package script or GitHub Actions; documented options include annotations, JSON output, warning thresholds, and suppressions. | Teams needing selector-scoped rules, structural checks, broader parser options, or CI adoption controls. |
Editor support: what the documentation establishes
All three tools have documented VS Code workflows. Markuplint’s FAQ says VS Code is its only officially supported editor, while its guides say VS Code-based editors that support extensions can use the extension. Those statements do not establish a native Neovim integration or equivalent behavior in other editors. Check the relevant editor’s current documentation before relying on an integration. See the Markuplint FAQ and Markuplint guides.
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- Install the chosen linter in the project where it supports a local dependency. This makes the tool version part of the project rather than relying on each developer’s global installation.
- Commit its configuration and use that configuration for both editor integration and the CLI wherever supported. For html-validate, the documentation explicitly recommends local installation to avoid changing warnings as global or bundled versions change.
- Run the CLI from a project script or CI. This catches files that an editor extension may not inspect, including HTMLHint’s unopened files.
- Check syntax and file coverage. Configure any needed transformer or parser plugin, then verify that the actual templates and component files are included in the command.
- Choose CI output and adoption settings. If using Markuplint, its documented CI guide covers GitHub annotations, JSON, warning thresholds, and suppressions; decide how existing findings should be introduced into the team’s checks.
Quick recommendation
- Pick HTMLHint for a direct CLI and configurable rules, provided you separately run it across the project when whole-repository coverage matters.
- Pick html-validate when project-local installation and shared editor/CLI configuration are central, especially if you are prepared to configure Vue or Markdown support.
- Pick Markuplint when its selector and structure checks, parser-plugin options, or documented GitHub CI controls match your project.
The cited official documentation does not provide a decision-relevant, comparable performance benchmark or popularity ranking for these tools. Choose based on coverage, syntax, configuration, and the workflow your team will actually run.
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