Dead Link Scanner

Scan websites, markdown files, and HTML files for broken links (dead links). Use when checking a website for 404s, validating links in documentation or READM...

Find broken links in websites, markdown files, and HTML documents.

Quick Start

# Scan a website for broken links
python3 scripts/dead_link_scanner.py scan https://example.com

# Scan with depth limit (default: 1)
python3 scripts/dead_link_scanner.py scan https://example.com --depth 3

# Scan a local markdown file
python3 scripts/dead_link_scanner.py file README.md

# Scan multiple files
python3 scripts/dead_link_scanner.py file docs/*.md

# JSON output
python3 scripts/dead_link_scanner.py scan https://example.com --json

# Only show broken links
python3 scripts/dead_link_scanner.py scan https://example.com --broken-only

Commands

scan

Crawl a website and check all links on each page.

python3 scripts/dead_link_scanner.py scan <url> [options]

Options:

• --depth <n> — Max crawl depth (default: 1, 0 = single page only)
• --timeout <seconds> — Request timeout (default: 10)
• --json — Output results as JSON
• --broken-only — Only show broken links
• --internal-only — Only check links within the same domain
• --max-urls <n> — Max URLs to check (default: 200)
• --delay <seconds> — Delay between requests (default: 0.2)

file

Scan local markdown or HTML files for broken links.

python3 scripts/dead_link_scanner.py file <path>... [options]

Options:

• --timeout <seconds> — Request timeout (default: 10)
• --json — Output as JSON
• --broken-only — Only show broken links

Output

Default text output:

✓ 200  https://example.com/about
✓ 200  https://example.com/blog
✗ 404  https://example.com/old-page  (found on: https://example.com)
✗ ERR  https://dead-domain.xyz  (found on: https://example.com) — ConnectionError

Summary line:

Checked 42 links: 39 OK, 3 broken