Does the linter change my Markdown automatically?
No. The linter acts as an advisory tool, highlighting issues with line numbers so you retain complete control over your content.
Editors
Find common Markdown structure and style issues.
Add an input and run this tool to see the output.
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Markdown Linter Developer Guide
100% Client-Side & PrivateReview Markdown headings, links, whitespace, and code fences before publishing documentation or a README.
Key capabilities
- Analyzes Markdown text against common structural and style best practices
- Checks for proper heading hierarchy (e.g. no skipping from H1 to H3)
- Detects empty links, broken image tags, missing alt text, and unclosed code blocks
- Displays actionable findings with line numbers and severity levels
Common use cases
- Validating documentation files and READMEs before opening pull requests
- Ensuring accessibility standards (like non-empty image alt text) in technical documentation
- Standardizing style across open source contributions and markdown-based blogs
How to use Markdown Linter
- Paste your Markdown content into the editor
- Review the findings list for suggestions and structural warnings
- Click on findings to identify the exact line requiring adjustment