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301 Chain Detector

Detect redirect chains, loops, and broken redirects. Check single URLs, upload a list, or import a crawl export. Get chain visualization, fix recommendations, and downloadable .htaccess and Nginx redirect rules.

Input

Input Mode

URL to Check

URL List (one per line)

URL List CSV Upload a CSV file with URLs. The first column containing URLs (http/https) will be used.

Crawl Export CSV Upload a Screaming Frog or Sitebulb crawl export CSV. URLs will be extracted from the Address/URL column.

Results

Enter URLs to detect redirect chains, loops, and broken redirects.

API Access

Access BigDataSEO tools programmatically via the Public API. Generate an API key in your account settings.

curl -H "Authorization: Bearer bds_YOUR_KEY" \
  "https://bigdataseo.com/api/v1/riba-calculate?n=500000"

Free tier: 100 requests/day. View full API docs →