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format validator

Markdown Validator

Lint Markdown locally with remark-lint, surface rule IDs/line numbers, and keep content private.

Results

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Status
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Details
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Issues
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Formatted Markdown
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How to use this validator

  1. Paste your Markdown.
  2. Run validate to lint with remark-lint.
  3. Fix reported rule/line/column issues and re-run.

Rules & checks

Uses remark-lint with the recommended rule set to flag undefined references and structural issues.

Shows rule IDs plus line and column numbers for quick fixes.

Runs fully client-side—nothing is uploaded, logged, or stored.

Inputs explained

  • Markdown content

    Paste docs, READMEs, or snippets. Keep payloads reasonable for quick linting.

When to use it

  • Lint README files before pushing to GitHub
  • Check docs/FAQ content for link issues
  • Quick QA for CMS Markdown fields without plugins

Common errors

  • Missing reference definitions
  • Unbalanced headings or skipped heading levels
  • Trailing spaces or missing trailing newline

Limitations

  • Syntax/style linting only; does not check spelling, SEO, or broken outbound links.
  • Large files may lint slower; keep snippets focused.

Tips

  • Define all reference links to avoid undefined-reference warnings
  • Add a trailing newline to keep linters happy across codebases
  • Keep headings incremental and consistent for better readability

Examples

Valid doc

  • Headings and links defined
  • Reference definitions present
  • Consistent structure

Missing link definition

  • [link][missing] -> flagged with rule and line/column

Deep dive

This Markdown validator uses remark-lint in your browser to surface rule IDs, lines, and columns for fast fixes.

Use it to clean README/docs/CMS content without uploading text to a server.

FAQs

Is my content uploaded?
No. The linting runs in-browser; refreshing clears it.
What rules are used?
remark-lint recommended defaults focused on common structural issues.

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All linting happens in your browser. No data is sent, logged, or stored.

Syntax and style linting only; it does not check spelling, SEO, or broken outbound links.