Scan every link in your Markdown for empty URLs, invalid syntax, localhost references, and duplicates.
Paste Markdown with links to scan them.
Free Markdown Broken Link Finder scans every link in your document for structural problems: empty URLs, invalid syntax, localhost references, relative paths without file extensions, anchor-only fragments, and duplicate links. No HTTP requests are made -- the analysis is instant and runs entirely in your browser.
Privacy: This tool runs entirely in your browser. Your text is never uploaded, logged, or cached. Close the tab and it's gone. Verify in DevTools → Network: zero requests fire.
Broken links hurt SEO and frustrate readers. Finding them shouldn't require a paid checker. The scanner runs 100% client-side.
| Input | Output | Typical size | Speed | Login needed |
|---|---|---|---|---|
| Markdown (.md) | Issue report | Any document size | < 10 ms | No |
Here's what this free tool does in detail — every feature is built to solve real problems, runs entirely in your browser, and is free forever.
The scanner checks every [text](url) link for empty URLs, malformed syntax (spaces, missing protocol), and localhost references. It catches problems that slip past a quick read but break in production.
For checking image references specifically, see the Dead Image Detector.
Links pointing to the same URL are flagged as informational duplicates. This helps identify accidental copy-paste repetitions in large documents.
Issues are classified as errors (empty/invalid URLs), warnings (localhost, relative paths without extensions), or informational (duplicates, anchor-only). This lets you prioritize fixes.
For cleaning up other Markdown issues, try the Markdown Formatter.
Click Copy report to get a formatted plaintext summary grouped by severity, with line numbers and link details. Paste it into a GitHub issue or PR review comment.
Paste any Markdown document with links into the input, or click Load example.
The scanner reports issues grouped by severity with line numbers and link details.
Click Copy report to get a plaintext summary for your issue tracker or PR.
Scan README and docs for broken links before pushing a new version.
Run the scanner on each page to catch empty or malformed URLs.
Find broken links that hurt page quality before they go live.
Check contributed docs for link quality before merging.
Verify that all links survived the migration process.
Yes. Free forever, no account required.
Empty URLs, invalid syntax, localhost, relative paths without extensions, duplicates, and anchor-only links.
No. It performs structural analysis only. No network calls are made.
No. Links inside fenced code blocks are skipped.
Errors: empty or invalid URLs. Warnings: localhost, extensionless relative paths. Info: duplicates, anchors.
No. Runs 100% in your browser.