SEO fix guide
robots.txt Not Parseable or Returning Error Page
The robots.txt file exists but returns HTML, an error page, or otherwise unparseable content instead of valid robots.txt directives. Search engines may ignore it entirely.
Issue ID: CRAWL-ROBOTS-PARSEABLE-001
Severity: moderate
Impact: Med
Effort: S
Use this article when
- You need deeper remediation guidance than the issue card can show.
- You want CMS-specific steps before handing the fix to a developer.
- You want a repeatable re-check path after shipping the change.
What this issue is
The robots.txt file exists but returns HTML, an error page, or otherwise unparseable content instead of valid robots.txt directives. Search engines may ignore it entirely.
Why it matters
The robots.txt file exists but returns HTML, an error page, or otherwise unparseable content instead of valid robots.txt directives. Search engines may ignore it entirely. This affects how clearly search engines understand the page and how persuasive it looks in search results.
How we detect it
- FreeSiteAudit flags this issue when the rule for CRAWL-ROBOTS-PARSEABLE-001 fails and the page evidence points to Http headers.
- You can usually confirm this by checking the page source or the relevant page settings inside your CMS.
Evidence examples
Check the affected page source, rendered output, or relevant CMS setting to confirm the missing or incorrect element.
How to fix it
- 1Ensure /robots.txt returns a plain text file with Content-Type: text/plain
- 2Fix server configuration that may be returning an HTML error page for /robots.txt
- 3Verify robots.txt is not behind an authentication wall or redirect
How to re-check it
- Navigate to /robots.txt and confirm it returns valid plain-text directives
Related tools
This issue is best verified with the full FreeSiteAudit crawl rather than a single-point mini tool.