Website review webjack.io
WebJack | webjack
Generated on February 14 2026 05:31 AM
Old data? UPDATE !
The score is 66/100
SEO Content
Title
WebJack | webjack
Length : 17
Perfect, your title contains between 10 and 70 characters.
Description
a JavaScript library that uses an audio software modem to communicate with an Arduino via a headphone jack
Length : 106
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 | WebJack |
| locale | en_US |
| description | a JavaScript library that uses an audio software modem to communicate with an Arduino via a headphone jack |
| url | https://webjack.io/ |
| site_name | webjack |
Headings
| H1 | H2 | H3 | H4 | H5 | H6 |
| 2 | 9 | 4 | 0 | 0 | 0 |
- [H1] webjack
- [H1] WebJack
- [H2] Installation
- [H2] Requirements
- [H2] Usage
- [H2] Plotting
- [H2] Hardware
- [H2] Troubleshooting
- [H2] Building
- [H2] Testing
- [H2] Developers
- [H3] Profiles
- [H3] Individual Profile Options
- [H3] Arduino wiring
- [H3] Cable pinouts
Images
We found 5 images on this web page.
Good, most or all of your images have alt attributes.
Text/HTML Ratio
Ratio : 48%
Ideal! This page's ratio of text to HTML code is between 25 and 70 percent.
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 24 links including 2 link(s) to files
| Anchor | Type | Juice |
|---|---|---|
| webjack | Internal | Passing Juice |
| WebJack | External | Passing Juice |
| SoftModem | External | Passing Juice |
| https://publiclab.github.io/webjack/examples/ | External | Passing Juice |
| Public Lab | External | Passing Juice |
| Google Summer of Code program | External | Passing Juice |
| https://publiclab.org/webjack | External | Passing Juice |
| webjack-firmata | External | Passing Juice |
| firmata.js | External | Passing Juice |
| example sketch | External | Passing Juice |
| here | External | Passing Juice |
| SoftModem | External | Passing Juice |
| Hardware | Internal | Passing Juice |
| adapter.js | External | Passing Juice |
| Demo | External | Passing Juice |
| Demo | External | Passing Juice |
| in the plotter example | External | Passing Juice |
| this YouTube video of WebJack-transmitted sensor data | External | Passing Juice |
| see this listing for various pinouts | External | Passing Juice |
| issue | External | Passing Juice |
| AudioRecorder | External | Passing Juice |
| http://publiclab.org/developers | External | Passing Juice |
| http://publiclab.org/contributing-to-public-lab-software | External | Passing Juice |
| Improve this page | External | Passing Juice |
SEO Keywords
Keywords Cloud
arduino softmodem connection audio demo profile cable browser webjack data
Keywords Consistency
| Keyword | Content | Title | Keywords | Description | Headings |
|---|---|---|---|---|---|
| webjack | 17 |  |
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| profile | 13 | |
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| arduino | 12 | |
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| data | 9 | |
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| demo | 8 | |
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Usability
Url
Domain : webjack.io
Length : 10
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
Warning! At least one email address has been found in the plain text. Use free antispam protector to hide email from spammers.
Deprecated HTML
Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
|
Excellent, your website doesn't use nested tables. |
|
Perfect. No inline css has been found in HTML tags! |
|
Great, your website has few CSS files. |
|
Perfect, your website has few JavaScript files. |
|
Perfect, your website takes advantage of gzip. |
Mobile
Mobile Optimization
|
Apple Icon |
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Meta Viewport Tag |
|
Flash content |
Optimization
XML Sitemap
Missing
Your website does not have an XML sitemap - this can be problematic.
A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt
https://webjack.io/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.
PageSpeed Insights
Device
Categories
Free SEO Testing Tool
Free SEO Testing Tool is a free SEO tool which provides you content analysis of the website.