https://clinicaltrials.gov
SEO
· 7 checks — Canonical, meta, content depth, internal links, image SEO, and hreflang rolled into one auditable list.SCORE
97
GRADE
A+
FIX
0
REVIEW
0
PASS
6
INFO
1
Cross-tab audit — SEO, performance, crawlability, mobile, structured data
Checks
76 PASS
A+Canonical URLProperly configuredPASS
Canonical URL
Properly configured
Properly configured
Info::
Canonical tag present
Got: https://clinicaltrials.gov/
Info::
Canonical is self-referencing
Info::
Canonical matches final URL after redirects
Info::
Canonical target returns 200
Canonical URL Configured
Page URL https://clinicaltrials.gov Canonical https://clinicaltrials.gov/ Match Self-referencing (correct) Target 200 ✓
AMeta TagsTitle: 4 charsPASS
Meta Tags
Title: 4 chars
Title: 4 chars
Info::
Page title is set
Got: Lock
Warning::
Title is only 4 characters — consider expanding
Title
"Lock"
4 characters Too short
Robots: Indexable (no restrictions)
A+Content Depth7105 words, DifficultPASS
Content Depth
7105 words, Difficult
7105 words, Difficult
Info::
Page has 7105 words — good depth for search engines
Info::
Reading level: Difficult (grade 13)
Good depth
Reading level
Very Easy
Easy
Fairly Easy
Standard
Fairly Difficult
Difficult
Very Difficult
Grade 13
Text-to-HTML Ratio
14% text 86% HTML
45 KB / 333 KB
A+Internal Links64 internal, 22 externalPASS
Internal Links
64 internal, 22 external
64 internal, 22 external
Info::
64 internal links (74%)
Info::
98% of links use descriptive anchor text
Info::
64 internal / 22 external links
Link Distribution
74% internal (64) 26% external (22)
Anchor Text Quality
84 Descriptive 2 Empty
Most Linked Internal Pages
| # | URL | Links |
|---|---|---|
| 1 | /about-site/disclaimer | 4 |
| 2 | /about-site/release-notes | 3 |
| 3 | /about-site/terms-conditions | 3 |
| 4 | /about-site/about-ctg | 3 |
| 5 | /study-basics/glossary | 3 |
| 6 | 2 | |
| 7 | /study-basics/learn-about-studies | 2 |
| 8 | /site-map | 2 |
| 9 | /expert-search | 2 |
| 10 | /policy/results-definitions#DelayResultsType | 2 |
Top External Domains
| Domain | Links |
|---|---|
| www.nlm.nih.gov | 4 |
| www.hhs.gov | 3 |
| www.nih.gov | 3 |
| www.ncbi.nlm.nih.gov | 2 |
| support.nlm.nih.gov | 2 |
| ncbi.nlm.nih.gov | 2 |
| nlmenterprise.co1.qualtrics.com | 2 |
| eeo.nih.gov | 1 |
| oig.hhs.gov | 1 |
| www.usa.gov | 1 |
A+Image SEO10 images, 10 descriptive filenamesPASS
Image SEO
10 images, 10 descriptive filenames
10 images, 10 descriptive filenames
Info::
All images have descriptive filenames
Info::
1 image(s) missing alt text — see Accessibility tab
10 descriptive
0 hash-based
0 generic
10 total
| Filename | Quality | Alt | Issues |
|---|---|---|---|
| nih-nlm-ncbi-logo.png | descriptive | ✗ | 1 |
See Accessibility tab for detailed alt text quality analysis.
A+Schema Markup AuditPer-type completeness vs Schema.org requirements + rich-result eligibilityPASS
Schema Markup Audit
Per-type completeness vs Schema.org requirements + rich-result eligibility
No structured data detected
Without JSON-LD or microdata, this page can't qualify for any of Google's rich result formats. Even basic Organization or WebSite schema is a quick win.
Missing schema opportunities
- moderate
Review
Page has review markup or testimonials that could be marked up
Enables star-rating snippets in search
Hreflang0 hreflang tagsINFO
Hreflang
0 hreflang tags
0 hreflang tags
No hreflang tags detected.
Hreflang tags are only needed for multilingual or multi-regional sites.
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.