Webbook.nist.gov - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
64% 
Page quality
72% 
Page structure
70% 
Link structure
100% 
Server
31% 
External factors
100% 
SEO Score
Response time
1.03 s
File size
12.40 kB
Words
385
Media files
0
Number of links
13 internal / 12 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Welcome to the NIST WebBook
The title contains the word Welcome to! More content should be covered in the title.
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The character encoding is not specified.
The character encoding is not specified in the HTTP header.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width
DCTERMS.titleWelcome to the NIST WebBook
DCTERMS.creatorNIST Office of Data and Informatics
DCTERMS.publisherNational Institute of Standards and Technology
og:titleWelcome to the NIST WebBook
og:typewebsite
og:imagechemistry/img/touch-icon-180x180.png
og:image:altimage of Erlenmeyer flask
langen
Content-Typetext/html; charset=UTF-8

Test up to 1.000 webpages of webbook.nist.gov with our free plan!

Try For Free
No trial. It's just free!

Page quality

Content
(Critically important)
There are only 385 words on this page. Good pages should have about 800 words of useful content.
29.6% of the text are stop words.
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 16.88 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The amount of tags is very high (10). We recommend using a maximum of 8 tags for this page.
Some tags are too long. With 72 characters this one is longer than 70 characters:
"thermochemical data for over 7000 organic and small inorganic compounds:"
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
This page uses Google authorship information without an image.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

No media files were found.

Page structure

H1 heading
(Critically important)
NIST Chemistry WebBook, SRD 69
Too many H1 headings
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 NIST Chemistry WebBook, SRD 69
H1 Welcome to the NIST Chemistry WebBook
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 12 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://webbook.nist.gov/Anchor Jump to content
https://www.nist.gov/New window External Subdomain National Institute of Standards and Technology
A-TITLE Link to NIST home page
/chemistry/Home
A-TITLE Main page of this site
/chemistry/name-ser/Name
A-TITLE Search for species by chemical name
/chemistry/form-ser/Formula
A-TITLE Search for species by chemical formula
/chemistry/inchi-ser/IUPAC identifier
A-TITLE Search for species by InChI or InChIKey
/chemistry/cas-ser/CAS number
A-TITLE Search for species by CAS number
/chemistry/More options
A-TITLE More serach options on the main page of this site
https://www.nist.gov/srd/External Subdomain SRD Program
A-TITLE Standard Reference Data page
https://data.nist.gov/sdp/External Subdomain Science Data Portal
A-TITLE NIST data discovery site
https://www.nist.gov/mml/odi/External Subdomain Office of Data and Informatics
A-TITLE Office of Data and Informatics page
/chemistry/faq/FAQ
A-TITLE Frequently asked questions page
/chemistry/Credits
A-TITLE Credits on the main page of the site
/chemistry/More documentation
A-TITLE More documentation on the main page of the site
https://www.nist.gov/srd/External Subdomain Standard Reference Data Program
/chemistry/NIST Chemistry WebBook
/chemistry/Click here to enter the NIST Chemistry WebBook.
https://www.nist.gov/srd/publi...External Subdomain Standard Reference Data Act
A-TITLE Link to page with information on the Standard Reference Data Act
https://www.nist.gov/privacy-p...New window External Subdomain Privacy Statement
A-TITLE page with privacy statement
https://www.nist.gov/privacy-p...New window External Subdomain Anchor Privacy Policy
A-TITLE page with privacy policy
https://www.nist.gov/privacy-p...New window External Subdomain Anchor Security Notice
A-TITLE page with security notice
https://www.nist.gov/disclaimerNew window External Subdomain Disclaimer
A-TITLE page with NIST disclaimer
https://www.nist.gov/privacy-p...New window External Subdomain Anchor Accessibility Statement
A-TITLE page with accessibility statement
https://www.nist.gov/office-di...New window External Subdomain FOIA
A-TITLE page about Freedom of Information Act
/chemistry/contact/New window Contact Us
A-TITLE page with contact information

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://webbook.nist.gov/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time is slow (1.03 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
The file size of the HTML document is fine (12 kB).

HTTP Response Header

NameValue
content-locationindex.html.en-us.en
varynegotiate,accept-language
tcnchoice
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
last-modifiedWed, 12 Jun 2024 14:32:09 GMT
etag"31c3-61ab23f578d72"
accept-rangesbytes
content-length12739
content-security-policydefault-src 'self'; img-src 'self' https://*.google-analytics.com https://*.googletagmanager.com; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://dap.digitalgov.gov https://*.google-analytics.com https://*.googletagmanager.com; connect-src 'self' https://*.google-analytics.com https://*.analytics.google.com https://*.googletagmanager.com;
permissions-policybrowsing-topics=(), geolocation=(), camera=(), microphone=()
content-typetext/html
content-languageen-us,en
dateSun, 27 Oct 2024 23:50:13 GMT
serverApache
strict-transport-securitymax-age=31536000
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 5,968 referring domains.
This page has 357,632 backlinks.
This page has backlinks from 2,747 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Crawl-delay: 5
Sitemap: https://webbook.nist.gov/sitemap_index.xml

Similar sites

Search preview

webbook.nist.gov
Welcome to the NIST WebBook

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
NIST77%Check
WebBook77%Check
NIST WebBook77%Check
NIST Chemistry WebBook71%Check
NIST Chemistry68%Check
Chemistry WebBook68%Check
Chemistry59%Check
Welcome50%Check
SRD50%Check
Data39%Check
Show more keywords and terms

Test up to 1.000 webpages of webbook.nist.gov with our free plan!

Try For Free
No trial. It's just free!

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions