Common Robots.txt Mistakes

Robots.txt looks simple, but small mistakes can create big crawl problems. A single broad rule can stop important pages from being crawled, while a missing sitemap line can slow discovery for new content.

Mistake 1: Blocking too much

Rules such as Disallow: / block the whole site for compliant crawlers. Use them only when you intentionally want the entire site hidden from crawling.

Mistake 2: Treating robots.txt as security

Robots.txt is public. Anyone can open it. Do not list secret admin URLs or sensitive files as if the file protects them. Use real access control or remove sensitive files from the publish folder.

Mistake 3: Forgetting the sitemap

The sitemap line helps crawlers find your sitemap quickly. Add the full URL, including protocol and domain.

Mistake 4: Not testing after deploy

Always open the live robots.txt URL after deployment. Check status code, content, line breaks, and important paths before assuming crawlers see the right version.