# Validate HTML parse errors

> Run a server-side HTML parse check and return actionable errors or warnings for static page documents.

Canonical: https://staticx.site/html-validator

## Catch parse problems

Run a server-side HTML parse check and review warnings before the page becomes a release.

## Useful for generated pages

AI and builder exports can contain subtle nesting or document structure issues.

## Better deploy confidence

Validation reduces avoidable release mistakes before you publish.

## How to use HTML Validator

Validate HTML structure before a generated or edited page becomes a production deployment.

1. **Paste the page** — Use the complete HTML document when possible, not just one section.
2. **Run validation** — StaticX checks server-side parse results and reports problems.
3. **Fix and retest** — Correct the markup, test again, then publish when the page is clean.

## Browsers forgive invalid HTML, but production teams should not rely on that.

A page may appear to work while still having broken structure, missing metadata, or form fields outside the expected context.

Validation is especially important before an AI agent deploys a site because it creates a concrete checkpoint before production.

## Validation before publishing

- **Checks structure** — Use it to catch malformed tags, nesting problems, and document issues.
- **Complements preview** — A visual preview can miss semantic or metadata problems.
- **Good before versions** — Validate before creating an immutable deployment version.

## FAQ

### Does valid HTML guarantee perfect design?

No. It confirms structure, not visual quality. Preview and QA are still needed.

### Should every deployment be validated?

For agent and CI workflows, yes. Validate index.html and 404.html before deploy.

### Can the validator fix my HTML?

No. It reports issues so you or an agent can correct them deliberately.

[View on staticx.site](https://staticx.site/html-validator)