How to lint markdown for style and syntax issues
- Step 1Drop the doc — Upload the Markdown to lint.
- Step 2Lint — Click Run — comprehensive lint report is produced.
- Step 3Address issues — Fix flagged violations using suggested fixes where provided.
Frequently asked questions
Which rules are checked?+
MD001 (heading increment), MD009 (trailing whitespace), MD010 (hard tabs), MD011 (reversed link), MD012 (blank lines), MD018/019 (heading spaces), MD022 (heading surrounds), MD025 (single H1), MD031 (code block surrounds), MD033 (inline HTML), MD047 (file ends with newline).
Can I customize rules?+
Currently rules are fixed. Custom rule selection is a future Pro feature.
Will it auto-fix?+
Suggested fixes are shown for fixable rules. Apply manually or via the Pro API for automated fixes.
Privacy first
All Markdown processing runs locally in your browser using JavaScript. No file is ever uploaded to JAD Apps servers — only metadata counters are saved for signed-in dashboard stats.