-
Internal No Response
-
Internal Client Error (4XX)
-
Internal Server Error (5XX)
-
Internal Redirect Loop
-
Internal Blocked by Robots.txt
-
Internal Blocked Resource
-
Internal Redirect Chain
-
External Blocked Resource
-
Internal Redirection (3XX)
-
Internal Redirection (Meta Refresh)
-
Internal Redirection (JavaScript)
-
External No Response
-
External Client Error (4XX)
-
External Server Error (5XX)
-
HTTP URLs
-
Mixed Content
-
Form URL Insecure
-
Form On HTTP URL
-
Missing HSTS Header
-
Unsafe Cross Origin Links
-
Protocol-Relative Resource Links
-
Missing Content-Security-Policy Header
-
Missing X-Content-Type-Options Header
-
Missing X-Frames-Options Header
-
Missing Secure Referrer-Policy Header
-
Bad Content Type
-
Noindex Only in Original HTML
-
Nofollow Only in Original HTML
-
Canonical Mismatch
-
Uses Old AJAX Crawling Scheme URLs
-
Uses Old AJAX Crawling Scheme Meta Fragment Tag
-
Pages with Blocked Resources
-
Contains JavaScript Links
-
Contains JavaScript Content
-
Page Title Only in Rendered HTML
-
Page Title Updated by JavaScript
-
Meta Description Only in Rendered HTML
-
Meta Description Updated by JavaScript
-
H1 Only in Rendered HTML
-
H1 Updated by JavaScript
-
Canonical Only in Rendered HTML
-
Pages With JavaScript Errors
-
Outlinks To Localhost
-
Pages Without Internal Outlinks
-
Non-Indexable Page Inlinks Only
-
Internal Nofollow Outlinks
-
Pages With High External Outlinks
-
Pages With High Internal Outlinks
-
Follow & Nofollow Internal Inlinks To Page
-
Internal Nofollow Inlinks Only
-
Pages With High Crawl Depth
-
Internal Outlinks With No Anchor Text
-
Non-Descriptive Anchor Text In Internal Outlinks
-
Non-200 Response
-
Missing Non-AMP Return Link
-
Missing Canonical to Non-AMP
-
Non-Indexable Canonical
-
Missing <html amp> Tag
-
Missing/Invalid Doctype HTML Tag
-
Missing Head Tag
-
Missing Body Tag
-
Missing Canonical
-
Missing/Invalid Meta Charset Tag
-
Missing/Invalid Meta Viewport Tag
-
Missing/Invalid AMP Script
-
Missing/Invalid AMP Boilerplate
-
Contains Disallowed HTML
-
Other Validation Errors
-
Indexable
-
Eliminate Render-Blocking Resources
-
Properly Size Images
-
Defer Offscreen Images
-
Minify CSS
-
Minify JavaScript
-
Reduce Unused CSS
-
Reduce Unused JavaScript
-
Efficiently Encode Images
-
Serve Images in Next-Gen Formats
-
Enable Text Compression
-
Preconnect to Required Origin
-
Reduce Server Response Times (TTFB)
-
Preload Key Requests
-
Reduce JavaScript Execution Time
-
Serve Static Assets With An Efficient Cache Policy
-
Minimize Main-Thread Work
-
Image Elements Do Not Have Explicit Width & Height
-
Avoid Large Layout Shifts
-
Avoid Serving Legacy JavaScript to Modern Browsers
-
Avoid Multiple Page Redirects
-
Use Video Format for Animated Images
-
Avoid Excessive DOM Size
-
Ensure Text Remains Visible During Webfont Load
Missing <html amp> Tag
AMP HTML documents must contain a top-level HTML or HTML AMP tag.
How to Analyse in the SEO Spider
View URLs with this issue in the ‘AMP’ tab and ‘Missing <html amp> Tag’ filter, and export all URLs using the ‘Export’ button.
Read our tutorial on ‘How To Audit & Validate Accelerated Mobile Pages (AMP)‘.
What Triggers This Issue
This issue is triggered when AMP HTML documents do not contain a top-level HTML or HTML AMP tag.
How To Fix
Review the AMP HTML specification and update the AMP to meet the guidelines.
Further Reading
- How To Audit & Validate Accelerated Mobile Pages (AMP) - From Screaming Frog
- AMP Required markup - From AMP.dev
