Fix Mobile-Friendly for Crawlers Setup Issues
Mobile-Friendly for Crawlers can return weak or inconsistent output when the target URL, crawler access, or baseline metadata is misconfigured. Use this checklist to stabilize setup before deeper analysis.
Common causes
- Wrong URL format or mixed protocol variants (http/https).
- Important paths blocked in robots or by firewall/CDN rules.
- Missing baseline assets (llms.txt, tools.json, sitemap, schema).
How to fix
- Normalize URL and test canonical destination first.
- Allow required bot/user-agent access for this check path.
- Re-run after baseline files are reachable and return 200.
Common errors
ValidationError: Invalid input payload in mobile-friendly-for-crawlersFetchError: Timeout while requesting target URL for mobile-friendly-for-crawlersParseError: Unsupported response format detected by mobile-friendly-for-crawlers
FAQ
- Why does Mobile-Friendly for Crawlers return weak results?
- Weak results usually indicate missing baseline signals (crawlability, schema, or clean input). Validate prerequisites and rerun the check.
- How do I improve Mobile-Friendly for Crawlers reliability in production?
- Use stable URLs, valid structured data, and consistent machine-readable files. Re-test after each fix to confirm signal improvement.
Related tools
- TTFB for Crawlers
Measure Time To First Byte for any URL. Fast TTFB helps AI crawlers index your page. Free TTFB checker. Enter URL.
- No-JS Fallback Checker
Check if content is available without JavaScript. Crawlers need static HTML. Free no-JS fallback checker for AI visibility.
- Free AEO Checker – AI Visibility Analyzer
Free AEO checker and visibility checking tool. One URL: check llms.txt, robots, tools.json, FAQ schema, TTFB. Get AI visibility score. AEO analyzer – no signup.
- Free Schema Markup Checker – FAQ, HowTo, Organization
Free schema markup checker and FAQ schema validator. Check FAQPage, HowTo, Organization JSON-LD. Get schema score. Schema markup analyzer – no signup.