How to detect broken links in markdown files
- Step 1Drop your doc — Paste the Markdown with potentially-broken links.
- Step 2Check — Click Run — DNS-level link validation runs.
- Step 3Review report — Inspect unreachable links and update them in your source.
Frequently asked questions
Why DNS only?+
Browser CORS prevents reading HTTP status codes from cross-origin URLs. DNS reachability is what's possible client-side.
Can I get HTTP status codes?+
For full HTTP-status validation, use a server-side link checker. The Pro plan's API access is on the roadmap for this.
What about CORS-blocked sites?+
Sites blocking CORS may report as unreachable even when alive. Cross-check by visiting the URL manually.
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.