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Internal No Response
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Internal Client Error (4XX)
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Internal Server Error (5XX)
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Internal Redirect Loop
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Internal Blocked by Robots.txt
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Internal Blocked Resource
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Internal Redirect Chain
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External Blocked Resource
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Internal Redirection (3XX)
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Internal Redirection (Meta Refresh)
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Internal Redirection (JavaScript)
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External No Response
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External Client Error (4XX)
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External Server Error (5XX)
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HTTP URLs
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Mixed Content
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Form URL Insecure
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Form On HTTP URL
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Missing HSTS Header
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Unsafe Cross Origin Links
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Protocol-Relative Resource Links
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Missing Content-Security-Policy Header
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Missing X-Content-Type-Options Header
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Missing X-Frames-Options Header
-
Missing Secure Referrer-Policy Header
-
Bad Content Type
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Noindex Only in Original HTML
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Nofollow Only in Original HTML
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Canonical Mismatch
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Uses Old AJAX Crawling Scheme URLs
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Uses Old AJAX Crawling Scheme Meta Fragment Tag
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Pages with Blocked Resources
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Contains JavaScript Links
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Contains JavaScript Content
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Page Title Only in Rendered HTML
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Page Title Updated by JavaScript
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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
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Pages With JavaScript Errors
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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
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Missing/Invalid Meta Viewport Tag
-
Missing/Invalid AMP Script
-
Missing/Invalid AMP Boilerplate
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Contains Disallowed HTML
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Other Validation Errors
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Indexable
-
Eliminate Render-Blocking Resources
-
Properly Size Images
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Defer Offscreen Images
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Minify CSS
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Minify JavaScript
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Reduce Unused CSS
-
Reduce Unused JavaScript
-
Efficiently Encode Images
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Serve Images in Next-Gen Formats
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Enable Text Compression
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Preconnect to Required Origin
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Reduce Server Response Times (TTFB)
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Preload Key Requests
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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
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Avoid Multiple Page Redirects
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Use Video Format for Animated Images
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Avoid Excessive DOM Size
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Ensure Text Remains Visible During Webfont Load
-
Best Practice – Accesskey Attribute Value Must Be Unique
-
Best Practice – Elements Must Not Have Tabindex Greater Than Zero
-
Best Practice – ARIA Dialog & Alertdialog Require Accessible Name
-
Best Practice – ARIA Treeitem Nodes Require Accessible Name
-
Best Practice – Role=text Should Have No Focusable Descendants
-
Best Practice – Form Elements Should Have Visible Label
-
Best Practice – Frames Should Be Tested With axe-core
-
Best Practice – Scope Attribute Should Be Used Correctly On Tables
-
WCAG 2.0 A – Scrollable Region Requires Keyboard Access
-
WCAG 2.0 A – Required ARIA Attributes Must Be Provided
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WCAG 2.0 A – ARIA Attribute Must Be Used As Specified For Role
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WCAG 2.0 A – ARIA Attributes Require Valid Values
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WCAG 2.0 A – ARIA Attributes Require Valid Names
-
WCAG 2.0 A – ARIA Commands Require Accessible Name
-
WCAG 2.0 A – ARIA Input Fields Require Accessible Name
-
WCAG 2.0 A – ARIA Meter Nodes Require Accessible Name
-
WCAG 2.0 A – ARIA Progressbar Nodes Require Accessible Name
-
WCAG 2.0 A – ARIA Roles Must Be Contained By Required Parent
-
WCAG 2.0 A – ARIA Roles Require Valid Values
-
WCAG 2.0 A – ARIA Toggle Fields Require Accessible Name
-
WCAG 2.0 A – ARIA Tooltip Nodes Require Accessible Name
-
WCAG 2.0 A – Certain ARIA Roles Must Contain Specific Children
-
WCAG 2.0 A – Aria-braille Require Non-braille Equivalent
-
WCAG 2.0 A – Aria-hidden Elements Contains Focusable Elements
-
WCAG 2.0 A – Aria-hidden=true Must Not Be Used In <body>
-
WCAG 2.0 A – Elements Must Only Use Permitted ARIA Attributes
-
WCAG 2.0 A – Elements Must Use Allowed ARIA Attributes
-
WCAG 2.0 A – IDs Used In ARIA & Labels Must Be Unique
-
WCAG 2.0 A – Page Requires Means To Bypass Repeated Blocks
-
WCAG 2.0 A – Form <input> Elements Require Labels
-
WCAG 2.0 A – Frames Require Title Attribute
-
WCAG 2.0 A – Frames Require Unique Title Attribute
-
WCAG 2.0 A – Frames With Focusable Content Must Not Use tabindex=-1
-
WCAG 2.0 A – Page Must Contain <title>
-
WCAG 2.0 A – HTML Element Lang Attribute Value Must Be Valid
-
WCAG 2.0 A – HTML Element Requires Lang Attribute
-
WCAG 2.0 A – Image Button Requires Alternate Text
-
WCAG 2.0 A – Images Require Alternate Text
-
WCAG 2.0 A – <object> Elements Require Alternate Text
-
WCAG 2.0 A – Active <area> Elements Require Alternate Text
-
WCAG 2.0 A – Elements Marked role=img Require Alternate Text
-
WCAG 2.0 A – SVG Images & Graphics Require Accessible Text
-
WCAG 2.0 A – <video> Elements Require <track> For Captions
-
WCAG 2.0 A – <video> or <audio> Elements Must Not Auto-play
-
WCAG 2.0 A – Buttons Require Discernible Text
-
WCAG 2.0 A – Input Buttons Require Discernible Text
-
WCAG 2.0 A – Links Require Discernible Text
-
WCAG 2.0 A – Links Must Be Distinguishable
-
WCAG 2.0 A – Select Element Requires Accessible Name
-
WCAG 2.0 A – Summary Elements Require Discernible Text
-
WCAG 2.0 A – Deprecated <marquee> Element Must Not Be Used
-
WCAG 2.0 A – Interactive Controls Must Not Be Nested
-
WCAG 2.0 A – List Items Must Be Contained In List Elements
-
WCAG 2.0 A – Lists Must Only Contain <li> Content Elements
-
WCAG 2.0 A – <dt> & <dd> Elements Must Be Contained by <dl>
-
WCAG 2.0 A – <dl> Must Only Have Ordered <dt> & <dd> Groups
-
WCAG 2.0 A – <blink> Elements Deprecated & Must Not Be Used
-
WCAG 2.0 A – <th> Element Requires Associated Data Cells
-
WCAG 2.0 A – Table Header Attr Must Refer To Cell In Same Table
-
WCAG 2.0 AA – Meta Viewport Zoom & Scaling Disabled
-
WCAG 2.0 AA – Lang Attribute Requires Valid Value
-
WCAG 2.0 AA – Text Requires Higher Color Contrast to Background
-
WCAG 2.0 AAA – Text Requires Higher Color Contrast Ratio
-
WCAG 2.1 AA – Autocomplete Attribute Must Be Used Correctly
-
WCAG 2.1 AA – Inline Text Spacing Must Be Adjustable
-
WCAG 2.2 AA – Touch Targets Require Sufficient Size & Spacing
-
Best Practice – Skip-link Target Should Exist & Be Focusable
-
Best Practice – All Page Content Must Be Contained By Landmarks
-
Best Practice – Page Requires One Main Landmark
-
Best Practice – Page Must Not Have More Than One Banner Landmark
-
Best Practice – Banner Landmark Must Not Be In Another Landmark
-
Best Practice – Page Must Not Have Multiple Contentinfo Landmarks
-
Best Practice – Page Requires At Most One Main Landmark
-
Best Practice – Complementary Landmarks & Asides Must Be Top Level
-
Best Practice – Contentinfo Landmark Must Be Top Level Landmark
-
Best Practice – Main Landmark Must Not Be In Another Landmark
-
Best Practice – Landmarks Require Unique Role Or Accessible Name
-
Best Practice – Page Must Contain <h1>
-
Best Practice – Heading Levels Should Only Increase By One
-
WCAG 2.0 A – Form Field Must Not Have Multiple Label Elements
-
WCAG 2.0 A – HTML Lang & XML Lang Value Should Match
-
Best Practice – Ensure Elements Marked Presentational Are Ignored
-
Best Practice – ARIA Role Should Be Appropriate For Element
-
Best Practice – Headings Should Not Be Empty
-
Best Practice – Meta Viewport Should Allow Zoom & Scale Up to 500%
-
Best Practice – Alt Text Should Not Be Repeated As Text
-
Best Practice – Table Headers Require Discernible Text
-
Best Practice – Table With Identical Summary & Caption Text
-
WCAG 2.0 A – Deprecated ARIA Roles Must Not Be Used
-
WCAG 2.0 A – Server-Side Image Maps Must Not Be Used
-
WCAG 2.0 AAA – Delayed Meta Refresh Must Not Be Used
-
WCAG 2.0 AAA – Links With Same Accessible Name
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
