Speed Insights
Grade A
100% performance
https://pldb.io
LCP
240ms
Largest paint
TBT
0ms
Blocking time
CLS
0.000
Layout shift
53
out of 100
52
out of 100
75/142 rule points
75
out of 100
54/72 rule points
45
out of 100
36/80 rule points
78
out of 100
76/92 rule points
Category point breakdown
- Material high-impact failures span 4 categories.
Biggest score-losing checks
For your AI agent
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Agent-readable files
Add common public security headers
Why this needs attention
Several browser protection headers are missing or present only as weak, narrow policies.
These headers reduce avoidable browser-side risk and show a baseline of care before launch.
Recommended correction
Evidence
Detected 0 of 5 common public security controls. Present: none. Missing: strict-transport-security, content-security-policy, x-content-type-options, frame protection (x-frame-options or content-security-policy frame-ancestors), referrer-policy. Needs strengthening: none.
Priority
Priority 5: fix before sharing the page publicly.
Fix Prompt
Strengthen answer-engine content quality
Why this needs attention
The page is technically discoverable, but its entity clarity, answer-ready copy, structured data, evidence, authorship, or freshness is not yet complete.
Search and answer systems need clear, extractable, verifiable facts in addition to crawl access and metadata.
Recommended correction
Evidence
Role-aware AEO content components: entity clarity 85/100, answer-ready text 12/100, semantic structured data 0/100. Detected role: home (high confidence).
Priority
Priority 6: fix during launch polish.
Fix Prompt
Label public form fields
Why this needs attention
Some form controls do not have a detectable label or accessible name.
Unlabeled inputs make email capture, demo requests, and signups harder for assistive technology users.
Recommended correction
Evidence
Detected labels or accessible names for 0 of 2 eligible user-facing form control(s).
Priority
Priority 7: fix during launch polish.
Fix Prompt
Fix rendered axe accessibility violations
Why this needs attention
The rendered page has accessibility rule violations detected by axe-core.
axe checks the actual browser-rendered page, so these issues can affect people using keyboards, screen readers, or other assistive technology.
Recommended correction
Evidence
axe found 4 violation rule(s); 4 non-contrast rule(s) are scored here, including 2 serious or critical rule(s). Color contrast is scored once by the dedicated contrast check. 1 result(s) require review. Top rules: link-name (1), target-size (7), landmark-one-main (1), region (4).
Priority
Priority 5: fix before sharing the page publicly.
Affected elements
Links must have discernible text
Fix all of the following: Element is in tab order and does not have accessible text Fix any of the following: Element does not have text that is visible to screen readers aria-label attribute does not exist or is empty aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty Element has no title attribute
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (112.1px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 22.8px instead of at least 24px.
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (77.8px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 20.8px instead of at least 24px.
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (229.1px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 20px instead of at least 24px.
Fix Prompt
Publish a valid sitemap
Why this needs attention
The sitemap file was not reachable or did not look like valid sitemap XML.
A sitemap helps search engines discover the landing page and related public pages sooner.
Recommended correction
Evidence
HTTP 404 returned for sitemap_xml.
Priority
Priority 7: fix during launch polish.
Fix Prompt
SEO / AEO
Severity mix: 1 critical, 8 high, 3 medium, 1 low. Coverage: 0 review and 2 not applicable.
Security
Severity mix: 2 critical, 3 high, 0 medium, 0 low. Coverage: 0 review and 1 not applicable.
Accessibility
Severity mix: 0 critical, 3 high, 6 medium, 0 low. Coverage: 0 review and 2 not applicable.
Design
Severity mix: 0 critical, 3 high, 7 medium, 1 low. Coverage: 1 review and 0 not applicable.
SEO / AEO
Severity mix: 1 critical, 8 high, 3 medium, 1 low. Coverage: 0 review and 2 not applicable.
Accessibility
Severity mix: 0 critical, 3 high, 6 medium, 0 low. Coverage: 0 review and 2 not applicable.
Security
Severity mix: 2 critical, 3 high, 0 medium, 0 low. Coverage: 0 review and 1 not applicable.
Design
Severity mix: 0 critical, 3 high, 7 medium, 1 low. Coverage: 1 review and 0 not applicable.
Failed checks
These checks need attention.
Answer-engine content quality
Why this needs attention
The page is technically discoverable, but its entity clarity, answer-ready copy, structured data, evidence, authorship, or freshness is not yet complete.
Search and answer systems need clear, extractable, verifiable facts in addition to crawl access and metadata.
Recommended correction
Evidence
Role-aware AEO content components: entity clarity 85/100, answer-ready text 12/100, semantic structured data 0/100. Detected role: home (high confidence). Failed: earned 15 of 40 points from partial coverage.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 6: fix during launch polish.
Fix Prompt
Heading structure
Why this needs attention
The page heading structure is either missing a single main heading or skips heading levels.
Clear headings help visitors, search engines, and assistive technology understand the page quickly.
Recommended correction
Evidence
Detected 1 visible H1 heading(s) and 1 visible heading(s) in the rendered page. Heading-level order is assessed separately under Accessibility. Failed: earned 6 of 8 points from partial coverage.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 9: fix during launch polish.
Fix Prompt
Canonical tag
Why this needs attention
The page does not declare which public URL is the preferred version.
A canonical tag reduces duplicate URL confusion before marketing links start spreading.
Recommended correction
Evidence
Canonical does not align with the scanned page: https://pldb.io/index.html. Failed: earned 0 of 10 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 9: fix during launch polish.
Fix Prompt
robots.txt reachability
Why this needs attention
The standard crawler instruction file was not reachable.
A reachable robots.txt helps crawlers understand what they can index before launch traffic arrives.
Recommended correction
Evidence
HTTP 404 returned for robots_txt. Failed: earned 0 of 8 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 11: fix during launch polish.
Fix Prompt
Sitemap validity
Why this needs attention
The sitemap file was not reachable or did not look like valid sitemap XML.
A sitemap helps search engines discover the landing page and related public pages sooner.
Recommended correction
Evidence
HTTP 404 returned for sitemap_xml. Failed: earned 0 of 12 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 7: fix during launch polish.
Fix Prompt
Relevant schema coverage
Why this needs attention
The page is missing a primary JSON-LD entity that matches its actual role, or its named entity is not supported by visible content.
Structured data gives search and answer engines explicit facts about your product.
Recommended correction
Evidence
No JSON-LD schema blocks were detected. Failed: earned 0 of 10 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 12: fix during launch polish.
Fix Prompt
Common security headers
Why this needs attention
Several browser protection headers are missing or present only as weak, narrow policies.
These headers reduce avoidable browser-side risk and show a baseline of care before launch.
Recommended correction
Evidence
Detected 0 of 5 common public security controls. Present: none. Missing: strict-transport-security, content-security-policy, x-content-type-options, frame protection (x-frame-options or content-security-policy frame-ancestors), referrer-policy. Needs strengthening: none. Failed: earned 0 of 18 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 5: fix before sharing the page publicly.
Fix Prompt
Form labels
Why this needs attention
Some form controls do not have a detectable label or accessible name.
Unlabeled inputs make email capture, demo requests, and signups harder for assistive technology users.
Recommended correction
Evidence
Detected labels or accessible names for 0 of 2 eligible user-facing form control(s). Failed: earned 0 of 14 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 7: fix during launch polish.
Fix Prompt
Landmark presence
Why this needs attention
The page is missing common landmarks such as header, nav, main, or footer.
Landmarks make the page easier to navigate for assistive technology and keyboard users.
Recommended correction
Evidence
Detected 0 visible main landmark(s) and 0 visible landmark element(s) or roles. A page should expose one main landmark. Failed: earned 0 of 10 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 18: lower-risk cleanup after urgent launch blockers.
Fix Prompt
Basic contrast
Why this needs attention
The scanner found text/background color pairs that may be hard to read, or could not verify contrast.
Low contrast makes a launch page feel less polished and can exclude users with low vision.
Recommended correction
Evidence
26 of 105 rendered text color sample(s) across captured viewports missed WCAG contrast targets. Worst rendered ratio: 1.34. Mobile 390px viewport: 13 of 60 failed; worst ratio 1.34:1. Failed: earned 0 of 8 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 20: lower-risk cleanup after urgent launch blockers.
Affected elements
Built with Scroll v180.0.1
PLDB
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Fix Prompt
Rendered axe accessibility violations
Why this needs attention
The rendered page has accessibility rule violations detected by axe-core.
axe checks the actual browser-rendered page, so these issues can affect people using keyboards, screen readers, or other assistive technology.
Recommended correction
Evidence
axe found 4 violation rule(s); 4 non-contrast rule(s) are scored here, including 2 serious or critical rule(s). Color contrast is scored once by the dedicated contrast check. 1 result(s) require review. Top rules: link-name (1), target-size (7), landmark-one-main (1), region (4). Failed: earned 6 of 18 points from partial coverage.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 5: fix before sharing the page publicly.
Affected elements
Links must have discernible text
Fix all of the following: Element is in tab order and does not have accessible text Fix any of the following: Element does not have text that is visible to screen readers aria-label attribute does not exist or is empty aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty Element has no title attribute
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (112.1px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 22.8px instead of at least 24px.
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (77.8px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 20.8px instead of at least 24px.
All touch targets must be 24px large, or leave sufficient space
Fix any of the following: Target has insufficient size (229.1px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 20px instead of at least 24px.
Fix Prompt
Hero clarity signals
Why this needs attention
One or more heading, introductory-copy, or next-action signals fell outside this heuristic's expected range; this does not by itself prove the page is vague.
The introduction should help visitors understand the purpose of this particular page.
Recommended correction
Evidence
Detected 1 visible H1 heading(s), 29 H1 characters, 0 introductory supporting-copy characters after excluding bylines and short labels, and 3 actionable CTA(s). Rendered evidence was used where available. The H1 text is treated as a subject label, so an appropriate short place, product, or page name does not lose points. Detected role: home (high confidence). Failed: earned 9 of 13 points from partial coverage.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 6: fix during launch polish.
Fix Prompt
Text density
Why this needs attention
The page may not provide enough useful context for its detected role, or its rendered structure needs review.
Too little copy can leave visitors confused; too much copy can bury the value proposition.
Recommended correction
Evidence
Detected about 85 visible word(s) in the rendered page. The contextual range is 120-1200 words for the detected home page role. Failed: earned 7 of 10 points from partial coverage.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 21: lower-risk cleanup after urgent launch blockers.
Fix Prompt
Rendered layout ergonomics
Why this needs attention
The browser-rendered page has layout or tap-target issues.
Horizontal overflow and tiny tap targets make the page feel broken on real devices, especially for mobile visitors.
Recommended correction
Evidence
Desktop horizontal overflow: 0px. Mobile horizontal overflow at 390px: 110px. WCAG 2.2 AA target-size failures: 7. Targets smaller than 24×24px pass only when the required spacing or another WCAG exception applies. Failed: earned 0 of 9 points.
How FreeScan evaluates this check (opens in a new tab)Priority
Priority 13: fix during launch polish.
Affected elements
Overflowing element
Overflowing element
Top Languages
Target has insufficient size (112.1px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 22.8px instead of at least 24px.
New Posts
Target has insufficient size (77.8px by 22px, should be at least 24px by 24px) Target has insufficient space to its closest neighbors. Safe clickable space has a diameter of 20.8px instead of at least 24px.
Fix Prompt
Page-level AEO readiness
Shared eligibility and content signals that affect every search and answer agent.
Index and citation eligibility
No general noindex directive was detected.
Snippet and answer controls
No general nosnippet or max-snippet:0 control was detected.
Canonical alignment
The canonical does not resolve to the scanned URL: https://pldb.io/index.html
Sitemap coverage and freshness
Sitemap coverage could not be verified.
Structured data
Semantic schema score 0/100. Detected 0 JSON-LD block(s), 0 parse error(s), 0 graph node(s), and primary types none. Completeness: 0/100. Graph connectivity: 0/100. No primary schema type matched the detected page role. The primary schema entity was not clearly supported by visible page content.
Public or paywalled content
No isAccessibleForFree structured-data value was detected.
Entity clarity
Entity alignment scored 85/100 for “Programming Language DataBase”. Title/H1 token overlap is 100%; description match detected; identity schema not detected.
Answer-ready visible text
Answerability scored 12/100 from 89 main-content words, 0 concise answer block(s), 0 question heading(s), 0 definition(s), 0 list(s), and 0 table(s).
Authorship and accountability
Authorship is not a universal requirement for the detected home page role.
Published or updated date
Freshness metadata is contextual for the detected home page role.
Supporting-source links
Supporting sources are contextual for the detected home page role and do not affect readiness.
Rendered content availability
Rendered audit completed with 45 visible text element(s).
Synthetic search-agent reachability
8 of 8 completed search/discovery User-Agent probes returned reachable content.
Optional LLM-readable summary
No llms.txt file was found; this is optional and does not reduce core AEO readiness.
OpenAIChatGPT searchOAI-SearchBotPASS · ALLOWED · Toggle crawler details
AI search
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
OpenAIOpenAI model trainingGPTBotPOLICY ALLOWED · Toggle crawler details
Model training
Robots: allowed
Synthetic probe: not applicable to this policy control
OpenAIChatGPT user fetchesChatGPT-UserUNKNOWN · Toggle crawler details
User-requested fetch
Robots: not applicable to user-requested fetches
Synthetic probe: not tested · access is unverified
AnthropicClaude model trainingClaudeBotPOLICY ALLOWED · Toggle crawler details
Model training
Robots: allowed
Synthetic probe: not applicable to this policy control
AnthropicClaude searchClaude-SearchBotPASS · ALLOWED · Toggle crawler details
AI search
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
AnthropicClaude user fetchesClaude-UserPASS · ALLOWED · Toggle crawler details
User-requested fetch
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
GoogleGoogle Search and AI featuresGooglebotPASS · ALLOWED · Toggle crawler details
Search and discovery
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
GoogleGemini data use and groundingGoogle-ExtendedPOLICY ALLOWED · Toggle crawler details
Data-use policy control
Robots: allowed
Synthetic probe: not applicable to this policy control
MicrosoftBing and CopilotBingbotPASS · ALLOWED · Toggle crawler details
Search and discovery
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
PerplexityPerplexity searchPerplexityBotPASS · ALLOWED · Toggle crawler details
AI search
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
PerplexityPerplexity user fetchesPerplexity-UserUNKNOWN · Toggle crawler details
User-requested fetch
Robots: not applicable to user-requested fetches
Synthetic probe: not tested · access is unverified
AppleSiri, Spotlight, and Safari searchApplebotPASS · ALLOWED · Toggle crawler details
Search and discovery
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
AppleApple foundation-model trainingApplebot-ExtendedPOLICY ALLOWED · Toggle crawler details
Data-use policy control
Robots: allowed
Synthetic probe: not applicable to this policy control
Mistral AIMistral searchMistralAI-IndexPASS · ALLOWED · Toggle crawler details
AI search
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
Mistral AIMistral user fetchesMistralAI-UserPASS · ALLOWED · Toggle crawler details
User-requested fetch
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
MetaMeta AI model and product datameta-externalagentPOLICY ALLOWED · Toggle crawler details
Model training
Robots: allowed
Synthetic probe: not applicable to this policy control
MetaMeta AI user fetchesmeta-externalfetcherPASS · ALLOWED · Toggle crawler details
User-requested fetch
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
AmazonAmazon model trainingAmazonbotPOLICY ALLOWED · Toggle crawler details
Model training
Robots: allowed
Synthetic probe: not applicable to this policy control
AmazonAlexa and Rufus searchAmzn-SearchBotPASS · ALLOWED · Toggle crawler details
AI search
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
AmazonAlexa user fetchesAmzn-UserPASS · ALLOWED · Toggle crawler details
User-requested fetch
Robots: allowed
Synthetic probe: reachable · HTTP 200 · 100% sampled-content parity
Common CrawlOpen web datasetsCCBotPOLICY ALLOWED · Toggle crawler details
Model training
Robots: allowed
Synthetic probe: not applicable to this policy control
Ready combines robots policy, a bounded synthetic User-Agent fetch, indexability, and snippet eligibility. Synthetic probes do not prove vendor-origin traffic. Preference states are training or data-use choices and do not lower the AEO score.
The image refreshes from FreeScan after a completed rescan. Clicking it always opens the newest public report saved for this exact scanned URL.
Scan evidence is included as untrusted data. The implementation brief instructs agents to verify findings before editing and to avoid destructive or speculative changes.
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