Website review d3js.org
D3 by Observable | The JavaScript library for bespoke data visualization
Generated on March 04 2026 01:32 AM
Old data? UPDATE !
The score is 53/100
SEO Content
Title
D3 by Observable | The JavaScript library for bespoke data visualization
Length : 72
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Description
The JavaScript library for bespoke data visualization
Length : 53
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Keywords
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Og Meta Properties
This page does not take advantage of Og Properties. This tags allows social crawler's better structurize your page. Use this free og properties generator to create them.
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 2 | 9 | 0 | 0 | 0 | 0 |
- [H1] D3
- [H1] Build your best work with D3 on Observable
- [H2] Selections and transitions
- [H2] Scales and axes
- [H2] Shapes
- [H2] Interactions
- [H2] Layouts
- [H2] Geographic maps
- [H2] … and much more!
- [H2] Powering Observable Plot
- [H2] Built by Observable
Images
We found 57 images on this web page.
56 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 : 1%
This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
Flash
Perfect, no Flash content has been detected on this page.
Iframe
Great, there are no Iframes detected on this page.
SEO Links
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 15 links including 0 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| Skip to content | Internal | Passing Juice |
| Get started | Internal | Passing Juice |
| What is D3? | Internal | Passing Juice |
| Examples | External | Passing Juice |
| Build with D3 on Observable → | External | Passing Juice |
| Forum | External | Passing Juice |
| Slack | External | Passing Juice |
| Discussions | External | Passing Juice |
| Releases | External | Passing Juice |
| Product | External | Passing Juice |
| Plot | External | Passing Juice |
| Integrations | External | Passing Juice |
| Pricing | External | Passing Juice |
| Enterprise | External | Passing Juice |
| ISC License | External | Passing Juice |
SEO Keywords
Keywords Cloud
observable slack pricing enterprise isc plot mike integrations bostock data
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| observable | 6 |  |
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| data | 2 | |
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| slack | 1 | |
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| isc | 1 | |
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| bostock | 1 | |
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Usability
Url
Domain : d3js.org
Length : 8
Favicon
Great, your website has a favicon.
Printability
We could not find a Print-Friendly CSS.
Language
Good. Your declared language is en.
Dublin Core
This page does not take advantage of Dublin Core.
Document
Doctype
HTML 5
Encoding
Perfect. Your declared charset is UTF-8.
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. |
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Too bad, your website is using inline styles. |
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Great, your website has few CSS files. |
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Perfect, your website has few JavaScript files. |
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Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
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Apple Icon |
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Meta Viewport Tag |
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Flash content |
Optimization
XML Sitemap
Great, your website has an XML sitemap.
| https://d3js.org/sitemap.xml |
Robots.txt
https://d3js.org/robots.txt
Great, your website has a robots.txt file.
Analytics
Missing
We didn't detect an analytics tool installed on this website.
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PageSpeed Insights
Device
Categories
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