Generated on March 17 2026 21:56 PM
Old data? UPDATE !
The score is 63/100
Title
VOSviewer - Visualizing scientific landscapes
Length : 45
Perfect, your title contains between 10 and 70 characters.
Description
VOSviewer is a software tool for constructing and visualizing bibliometric networks.
Length : 84
Great, your meta description contains between 70 and 160 characters.
Keywords
Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create keywords.
Og Meta Properties
Good, your page take advantage of Og Properties.
| Property | Content |
|---|---|
| title | VOSviewer - Visualizing scientific landscapes |
| site_name | VOSviewer |
| url | https://www.vosviewer.com// |
| type | website |
| image | https://www.vosviewer.com/resources/applicationlogo.png |
| description | VOSviewer is a software tool for constructing and visualizing bibliometric networks. |
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 1 | 1 | 30 | 5 | 0 | 0 |
Images
We found 21 images on this web page.
16 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Text/HTML Ratio
Ratio : 17%
Good, this page's ratio of text to HTML code is higher than 15, but lower than 25 percent.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
URL Rewrite
Good. Your links looks friendly!
Underscores in the URLs
Perfect! No underscores detected in your URLs.
In-page links
We found a total of 38 links including 0 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Home | Internal | Passing Juice |
| Features | Internal | Passing Juice |
| Highlights | Internal | Passing Juice |
| Screenshots | Internal | Passing Juice |
| Examples | Internal | Passing Juice |
| Getting Started | Internal | Passing Juice |
| Download | Internal | Passing Juice |
| Publications | Internal | Passing Juice |
| Products | Internal | Passing Juice |
| Course | External | Passing Juice |
| Contact | Internal | Passing Juice |
| Leiden University | External | Passing Juice |
| CWTS | External | Passing Juice |
| CWTS B.V. | External | Passing Juice |
| CWTS Leiden Ranking | External | Passing Juice |
| CWTS Journal Indicators | External | Passing Juice |
| CitNetExplorer | External | Passing Juice |
| instructions how to enable JavaScript in your web browser | External | Passing Juice |
| OpenAlex | External | Passing Juice |
| OurResearch | External | Passing Juice |
| ROR (Research Organization Registry) IDs | External | Passing Juice |
| discontinued | External | Passing Juice |
| released last week | External | Passing Juice |
| Lens | External | Passing Juice |
| this blog post | External | Passing Juice |
| Searching in titles of documents | External | Passing Juice |
| blog post | External | Passing Juice |
| Dimensions | External | Passing Juice |
| here | External | Passing Juice |
| here | External | Passing Juice |
| here | External | Passing Juice |
| here | External | Passing Juice |
| Launch VOSviewer | Internal | Passing Juice |
| this blog post | External | Passing Juice |
| Launch VOSviewer | Internal | Passing Juice |
| AIDA booklet | External | Passing Juice |
| Privacy | Internal | noFollow |
| Build on Applepie CMS by Waltman Development | External | Passing Juice |
Keywords Cloud
vosviewer released creating networks data based been maps online version
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| vosviewer | 32 | ![]() |
![]() |
![]() |
![]() |
| version | 17 | ![]() |
![]() |
![]() |
![]() |
| maps | 11 | ![]() |
![]() |
![]() |
![]() |
| data | 10 | ![]() |
![]() |
![]() |
![]() |
| based | 10 | ![]() |
![]() |
![]() |
![]() |
Url
Domain : vosviewer.com
Length : 13
Favicon
Great, your website has a favicon.
Printability
Great. We have found a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Doctype
HTML 5
Encoding
Perfect. Your declared charset is ISO-8859-1.
W3C Validity
Errors : 0
Warnings : 0
Email Privacy
Great no email address has been found in plain text!
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
![]() |
Excellent, your website doesn't use nested tables. |
![]() |
Too bad, your website is using inline styles. |
![]() |
Too bad, your website has too many CSS files (more than 4). |
![]() |
Perfect, your website has few JavaScript files. |
![]() |
Perfect, your website takes advantage of gzip. |
Mobile Optimization
![]() |
Apple Icon |
![]() |
Meta Viewport Tag |
![]() |
Flash content |
XML Sitemap
Great, your website has an XML sitemap.
| https://www.vosviewer.com/sitemap.xml |
Robots.txt
https://vosviewer.com/robots.txt
Great, your website has a robots.txt file.
Analytics
Missing
We didn't detect an analytics tool installed on this website.
Web analytics let you measure visitor activity on your website. You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.