How many websites pass the Content Type Html check?
Based on 11 audited sites · Updated 2026-07-16
About This Check
Checks that the response Content-Type is text/html. Non-HTML responses can prevent indexers and LLMs from extracting meaningful content.
Why This Matters
LLM Discoverability
AI crawlers use Content-Type to decide how to parse a response; non-HTML types are either silently skipped or misinterpreted, preventing reliable content extraction for training data and RAG pipelines.
SEO Impact
Search engines index HTML documents; a wrong Content-Type header can cause Googlebot to skip parsing entirely, leaving the page absent from search results.
What To Do Next
Every audited site in the current sample passes content type html, so this check is currently a baseline expectation rather than a differentiator.
- Prioritize content type html on templates that create many URLs, because one template fix can improve a large share of fetch, render, and url integrity.
- After changing the page, re-run the audit and compare the observed value for this check instead of relying on visual inspection alone.
- Use the 100% pass rate as a benchmark: if your site fails here, passing the check moves it closer to the visible majority of crawlable, AI-readable pages.
Status Breakdown
Compliance Trend
Daily pass, warning, and failure rates across benchmark snapshots (up to 90 days).
Related Checks
Run a free audit to see whether your site passes this check, or browse the leaderboard and the audited-sites directory.