Rule Catalog

WebAudit analyzes your website against 177 rules across SEO, performance, security, accessibility, and AI optimization categories.

177Total Rules

19Categories

Severity Levels

Critical-10 to -15 points

Major issue that significantly impacts SEO/visibility

Warning-3 to -8 points

Moderate issue that should be addressed

Info-1 to -2 points

Minor issue or best practice recommendation

Categories Overview

Category	Rules	Focus Area
Technical	35	HTTP, URLs, Performance, Mobile
Crawlability	18	Robots, Sitemap, Canonical, Indexing
On-Page	25	Title, Meta, Headings, Social
Content	8	Quality, Duplicates, Readability
Images	10	Alt text, Optimization, Loading
Links	9	Internal, External, Anchors
Schema	10	JSON-LD, Validation, Types
Security	10	SSL, Headers, HSTS
GEO	20	AI Readability, Citations, Crawlability
Accessibility	12	WCAG, ARIA, Contrast
International	7	Hreflang, Language
Local	5	LocalBusiness, NAP
Total	177

Technical SEO

HTTP responses, URLs, redirects, and protocol issues

ID	Rule	Severity	Condition	Weight
TECH-001	Page returns 4xx error	Critical	status_code >= 400 AND < 500	10
TECH-002	Page returns 5xx error	Critical	status_code >= 500	10
TECH-003	Redirect chain detected	Warning	redirect_count > 2	6
TECH-004	Redirect loop detected	Critical	redirect_loop = true	10
TECH-005	Long redirect chain	Warning	redirect_count > 4	7
TECH-006	Temporary redirect (302) on permanent content	Warning	uses_302_for_permanent = true	5
TECH-007	Mixed content on HTTPS page	Warning	mixed_content_count > 0	7
TECH-008	Page served over HTTP	Critical	protocol = 'http'	9
TECH-009	Soft 404 detected	Warning	is_soft_404 = true	6
TECH-010	URL contains uppercase characters	Info	url_has_uppercase = true	2
TECH-011	URL too long	Warning	url_length > 200	4
TECH-012	URL contains special characters	Info	url_has_special_chars = true	2
TECH-013	Inconsistent trailing slash	Warning	trailing_slash_inconsistent = true	4
TECH-014	WWW/non-WWW inconsistency	Warning	www_inconsistent = true	5
TECH-015	URL parameter duplication	Warning	duplicate_param_pages > 0	5

Performance

Core Web Vitals, page speed, and resource optimization

ID	Rule	Severity	Condition	Weight
PERF-001	Slow Time to First Byte	Warning	ttfb_ms > 800	7
PERF-002	Very slow TTFB	Critical	ttfb_ms > 2000	9
PERF-003	Poor LCP (Largest Contentful Paint)	Warning	lcp_ms > 2500	8
PERF-004	Very poor LCP	Critical	lcp_ms > 4000	9
PERF-005	Poor CLS (Cumulative Layout Shift)	Warning	cls_score > 0.1	7
PERF-006	Very poor CLS	Critical	cls_score > 0.25	8
PERF-007	Poor INP (Interaction to Next Paint)	Warning	inp_ms > 200	7
PERF-008	Very poor INP	Critical	inp_ms > 500	8
PERF-009	Large page size	Warning	total_size > 3MB	6
PERF-010	Very large page size	Critical	total_size > 5MB	8
PERF-011	Too many HTTP requests	Warning	resource_count > 100	5
PERF-012	Excessive HTTP requests	Critical	resource_count > 200	7
PERF-013	Large HTML size	Warning	html_size > 500KB	5
PERF-014	Render-blocking resources	Warning	blocking_resources > 0	5
PERF-015	Excessive render-blocking resources	Critical	blocking_resources > 5	7
PERF-016	Missing compression	Warning	compression_enabled = false	6
PERF-017	Unminified CSS	Info	unminified_css = true	3
PERF-018	Unminified JavaScript	Info	unminified_js = true	3
PERF-019	Missing browser caching	Warning	cache_headers_missing = true	5
PERF-020	Slow page load time	Warning	load_time_ms > 3000	6

Mobile

Mobile-friendliness and responsive design

ID	Rule	Severity	Condition	Weight
MOBILE-001	Missing viewport meta tag	Critical	viewport_meta_missing = true	8
MOBILE-002	Viewport not responsive	Warning	viewport_not_responsive = true	7
MOBILE-003	Content wider than screen	Warning	content_wider_than_viewport = true	6
MOBILE-004	Touch elements too close	Warning	touch_elements_too_close = true	5
MOBILE-005	Text too small to read	Warning	font_size_too_small = true	6
MOBILE-006	Tap targets too small	Warning	tap_targets_too_small = true	5

Crawlability & Indexing

Robots.txt, sitemaps, canonical tags, and crawl directives

ID	Rule	Severity	Condition	Weight
CRAWL-001	robots.txt missing	Warning	robots_txt_exists = false	5
CRAWL-002	robots.txt returns error	Warning	robots_txt_status >= 400	6
CRAWL-003	robots.txt syntax error	Warning	robots_txt_valid = false	5
CRAWL-004	Important page blocked by robots.txt	Critical	important_page_blocked = true	9
CRAWL-005	Sitemap missing	Warning	sitemap_exists = false	5
CRAWL-006	Sitemap not in robots.txt	Info	sitemap_in_robots = false	3
CRAWL-007	Sitemap XML error	Warning	sitemap_valid = false	6
CRAWL-008	Sitemap URL returns error	Warning	sitemap_url_errors > 0	6
CRAWL-009	Page noindexed	Info	meta_robots contains 'noindex'	3
CRAWL-010	Page nofollowed	Info	meta_robots contains 'nofollow'	3
CRAWL-011	Canonical URL missing	Info	canonical = empty	4
CRAWL-012	Canonical URL mismatch	Warning	canonical != current_url	6
CRAWL-013	Canonical points to non-existent page	Critical	canonical_status >= 400	8
CRAWL-014	Canonical points to redirected page	Warning	canonical_redirects = true	5
CRAWL-015	Self-referencing canonical missing	Info	self_canonical_missing = true	3
CRAWL-016	Orphan page (no internal links)	Warning	internal_links_in = 0	7
CRAWL-017	Page too deep	Warning	depth > 4	5
CRAWL-018	Page very deep	Critical	depth > 7	7

Title Tags

Page title optimization and best practices

ID	Rule	Severity	Condition	Weight
TITLE-001	Title tag missing	Critical	title = empty	10
TITLE-002	Title tag too short	Warning	title_length < 30	5
TITLE-003	Title tag too long	Warning	title_length > 60	5
TITLE-004	Title tag very long (truncated in SERP)	Info	title_length > 70	3
TITLE-005	Duplicate title tag	Warning	title_duplicate = true	7
TITLE-006	Title same as H1	Info	title = h1	2
TITLE-007	Title missing primary keyword	Info	title_missing_keyword = true	4

Meta Descriptions

Meta description optimization for search results

ID	Rule	Severity	Condition	Weight
META-001	Meta description missing	Warning	meta_description = empty	6
META-002	Meta description too short	Info	meta_desc_length < 70	3
META-003	Meta description too long	Warning	meta_desc_length > 160	4
META-004	Duplicate meta description	Warning	meta_desc_duplicate = true	6
META-005	Meta description same across pages	Warning	meta_desc_not_unique = true	5

Headings

H1-H6 heading structure and hierarchy

ID	Rule	Severity	Condition	Weight
H1-001	H1 tag missing	Critical	h1_count = 0	8
H1-002	Multiple H1 tags	Warning	h1_count > 1	5
H1-003	H1 tag too long	Info	h1_length > 70	2
H1-004	H1 tag too short	Info	h1_length < 10	2
H1-005	Duplicate H1 across pages	Warning	h1_duplicate = true	5
H1-006	Empty H1 tag	Warning	h1_empty = true	6
HEADING-001	Heading hierarchy broken	Warning	heading_hierarchy_valid = false	5
HEADING-002	Skipped heading level	Info	heading_level_skipped = true	3
HEADING-003	No subheadings (H2-H6)	Info	subheading_count = 0	3

Social Tags

OpenGraph and Twitter Card metadata

ID	Rule	Severity	Condition	Weight
SOCIAL-001	OpenGraph tags missing	Info	og_tags_present = false	3
SOCIAL-002	og:title missing	Info	og_title = empty	2
SOCIAL-003	og:description missing	Info	og_description = empty	2
SOCIAL-004	og:image missing	Info	og_image = empty	3
SOCIAL-005	og:image too small	Warning	og_image_too_small = true	4
SOCIAL-006	Twitter Card missing	Info	twitter_card = empty	2

Content Quality

Content depth, uniqueness, and readability

ID	Rule	Severity	Condition	Weight
CONTENT-001	Thin content	Warning	word_count < 300	6
CONTENT-002	Very thin content	Critical	word_count < 100	8
CONTENT-003	Duplicate content detected	Critical	content_duplicate = true	9
CONTENT-004	Near-duplicate content	Warning	content_similarity > 80%	7
CONTENT-005	Low readability score	Info	readability_score < 30	3
CONTENT-006	Very low readability	Warning	readability_score < 20	5
CONTENT-007	Keyword stuffing detected	Warning	keyword_density > 3%	6
CONTENT-008	No text content	Critical	word_count = 0	9

Images

Image optimization, alt text, and loading

ID	Rule	Severity	Condition	Weight
IMG-001	Missing alt attribute	Warning	image_missing_alt = true	6
IMG-002	Empty alt attribute	Info	image_empty_alt = true	3
IMG-003	Alt text too long	Info	alt_length > 125	2
IMG-004	Large image file	Warning	image_size > 200KB	5
IMG-005	Very large image file	Critical	image_size > 500KB	7
IMG-006	Unoptimized image format	Info	image_format_suboptimal = true	3
IMG-007	Missing lazy loading	Info	lazy_loading_missing = true	3
IMG-008	Missing image dimensions	Info	image_dimensions_missing = true	2
IMG-009	Broken image	Critical	image_status >= 400	8
IMG-010	Missing responsive images	Info	srcset_missing = true	3

Links

Internal and external link health

ID	Rule	Severity	Condition	Weight
LINK-001	Broken internal link	Critical	internal_link_broken = true	8
LINK-002	Broken external link	Warning	external_link_broken = true	4
LINK-003	Too many outbound links	Warning	outbound_links > 100	4
LINK-004	Excessive outbound links	Critical	outbound_links > 200	6
LINK-005	Too few internal links	Warning	internal_links < 3	5
LINK-006	Generic anchor text	Info	generic_anchor_count > 5	3
LINK-007	Redirect internal link	Info	internal_link_redirects = true	3
LINK-008	External link without rel attribute	Info	external_norel = true	2
LINK-009	Nofollow on internal link	Info	internal_nofollow = true	2

Schema & Structured Data

JSON-LD and structured data validation

ID	Rule	Severity	Condition	Weight
SCHEMA-001	Invalid JSON-LD syntax	Critical	json_ld_valid = false	7
SCHEMA-002	Schema validation errors	Warning	schema_errors > 0	5
SCHEMA-003	Schema validation warnings	Info	schema_warnings > 0	3
SCHEMA-004	Missing required schema property	Warning	schema_required_missing = true	5
SCHEMA-005	No structured data present	Info	structured_data_count = 0	3
SCHEMA-006	Missing Organization schema	Info	has_organization_schema = false	2
SCHEMA-007	Missing WebSite schema	Info	has_website_schema = false	2
SCHEMA-008	Missing Breadcrumb schema	Info	has_breadcrumb_schema = false	2
SCHEMA-009	Article missing required properties	Warning	article_incomplete = true	5
SCHEMA-010	Product missing required properties	Warning	product_incomplete = true	5

Security

SSL, HTTPS, and security headers

ID	Rule	Severity	Condition	Weight
SEC-001	SSL certificate invalid	Critical	ssl_valid = false	10
SEC-002	SSL certificate expired	Critical	ssl_expired = true	10
SEC-003	SSL certificate expiring soon	Warning	ssl_days_remaining < 30	7
SEC-004	Weak TLS version	Warning	tls_version < 1.2	6
SEC-005	Missing HSTS header	Warning	hsts_missing = true	5
SEC-006	HSTS max-age too short	Info	hsts_max_age < 1 year	3
SEC-007	Missing Content-Security-Policy	Info	csp_missing = true	3
SEC-008	Missing X-Frame-Options	Info	x_frame_options_missing = true	3
SEC-009	Missing X-Content-Type-Options	Info	x_content_type_missing = true	2
SEC-010	Insecure form action	Warning	insecure_form = true	6

GEO - AI Readability

Content structure for AI and LLM consumption

ID	Rule	Severity	Condition	Weight
GEO-001	No structured summary	Warning	has_summary_section = false	5
GEO-002	No FAQ section	Info	has_faq_section = false	3
GEO-003	No key takeaways	Info	has_key_takeaways = false	3
GEO-004	No definition boxes	Info	has_definitions = false	2
GEO-005	No bullet points or lists	Info	has_lists = false	2
GEO-006	No comparison tables	Info	has_comparison_table = false	2
GEO-007	Inconsistent terminology	Warning	terminology_consistent = false	4
GEO-008	No step-by-step instructions	Info	has_steps = false	2

GEO - AI Citations

Attribution and credibility signals for AI

ID	Rule	Severity	Condition	Weight
GEO-010	Missing author attribution	Warning	has_author = false	5
GEO-011	No external citations	Info	external_citations = 0	3
GEO-012	Statistics without sources	Warning	stats_without_source > 0	5
GEO-013	No publish/update date	Info	has_date = false	3
GEO-014	Content not fact-checkable	Info	fact_checkable = false	3
GEO-015	Missing expert quotes	Info	has_expert_quotes = false	2

GEO - LLM Crawlability

AI bot access and content rendering

ID	Rule	Severity	Condition	Weight
GEO-020	AI bots blocked in robots.txt	Warning	ai_bots_blocked = true	6
GEO-021	GPTBot blocked	Info	gptbot_blocked = true	4
GEO-022	ClaudeBot blocked	Info	claudebot_blocked = true	4
GEO-023	Content heavily JS-dependent	Warning	js_content_ratio > 70%	5
GEO-024	No server-side rendering	Info	ssr_enabled = false	3
GEO-025	Content cloaking detected	Critical	cloaking_detected = true	9

Accessibility

WCAG compliance and assistive technology support

ID	Rule	Severity	Condition	Weight
A11Y-001	Missing lang attribute	Warning	lang_missing = true	5
A11Y-002	Missing ARIA landmarks	Info	aria_landmarks = 0	3
A11Y-003	Low color contrast	Warning	contrast_ratio < 4.5	5
A11Y-004	Very low color contrast	Critical	contrast_ratio < 3	7
A11Y-005	Missing form labels	Warning	form_labels_missing > 0	5
A11Y-006	Missing skip navigation	Info	skip_link_missing = true	3
A11Y-007	Keyboard navigation issues	Warning	keyboard_nav_issues = true	5
A11Y-008	Missing focus indicators	Warning	focus_indicators_missing = true	4
A11Y-009	Auto-playing media	Warning	autoplay_media = true	4
A11Y-010	Missing captions for video	Warning	video_captions_missing = true	5
A11Y-011	Missing transcripts for audio	Warning	audio_transcript_missing = true	5
A11Y-012	Tab order issues	Warning	tab_order_issues = true	4

International SEO

Hreflang and multi-language optimization

ID	Rule	Severity	Condition	Weight
INTL-001	Hreflang tag missing	Info	hreflang_present = false	3
INTL-002	Hreflang return link missing	Warning	hreflang_return_missing = true	5
INTL-003	Self-referencing hreflang missing	Info	hreflang_self_missing = true	3
INTL-004	x-default hreflang missing	Info	hreflang_xdefault_missing = true	3
INTL-005	Invalid hreflang language code	Warning	hreflang_lang_invalid = true	5
INTL-006	Hreflang points to non-canonical	Warning	hreflang_to_non_canonical = true	5
INTL-007	Language/region mismatch	Warning	lang_region_mismatch = true	4

Local SEO

Local business optimization

ID	Rule	Severity	Condition	Weight
LOCAL-001	Missing LocalBusiness schema	Info	has_local_schema = false	3
LOCAL-002	NAP inconsistency	Warning	nap_inconsistent = true	5
LOCAL-003	Missing address on contact page	Info	contact_address_missing = true	3
LOCAL-004	Missing phone number	Info	phone_missing = true	2
LOCAL-005	Missing map embed	Info	map_embed_missing = true	2

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