Search Engine Optimization Overview
89
100
Explain that Stuff
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
Seo
Title
The title tag is perfect.
Explain that Stuff
Meta description
The meta description tag is good.
A collection of FREE, easy-to-understand science, technology, and how-it-works articles for the whole family!
Headings
The headings are properly set.
h1
1- The FREE online science and technology book
h2
11- Hard stuff... made simple!
- How to use this site
- What's hot in November 2022?
- What's new for '22?
- Most popular
- What else is on our site?
- Who uses this site?
- Follow us on your favorite sites!
- Save or share this page
- Privacy and cookies
- More to explore on our website...
h3
35- Climate change
- Heat pumps
- Molecules
- Carbon offsets
- Mirrors
- Artificial intelligence
- Gravity
- History of flight
- Cranes
- History of electricity
- Software
- Great psychology experiments
- What is science—and why does it matter?
- History of communication
- Water pollution
- Electricity
- Nanotechnology
- Magnetism
- Gears
- Batteries
- Electric motors
- Global warming
- Cloud computing
- Communications
- Computers
- Electricity and electronics
- Energy
- Engineering
- Environment
- Gadgets
- Home life
- Materials
- Science
- Tools, instruments, and measurement
- Transportation
Content keywords
The content has relevant keywords.
explainthatstuff
Image keywords
All images have alt attributes set.
SEO friendly URL
The URL is SEO friendly.
https://www.explainthatstuff.com/
404 page
The website has 404 error pages.
https://www.explainthatstuff.com/404-0e292467fa9d798efb247ed9969d29e9
Robots.txt
The webpage can be accessed by search engines.
Noindex
The webpage does not have a noindex tag set.
In-page links
The number of links on the webpage is okay.
Internals
74- https://www.explainthatstuff.com/searchmob.html
- Home
- A-Z index
- Random article
- Timeline
- Teaching guide
- About us
- Privacy & cookies
- Chris Woodford
- curriculum learning
- A-Z index
- Timeline
- Random
- Search
- Teaching guide
- Climate change
- Heat pumps
- Molecules
- Carbon offsets
- Mirrors
- Artificial intelligence
- Gravity
- History of flight
- Cranes
- History of electricity
- Software
- Great psychology experiments
- What is science—and why does it matter?
- History of communication
- Water pollution
- Electricity
- Nanotechnology
- Magnetism
- Gears
- Batteries
- Electric motors
- Global warming
- Cloud computing
- Communications
- Computers
- Electricity and electronics
- Energy
- Engineering
- Environment
- Gadgets
- Home life
- Materials
- Science
- Tools, instruments, and measurement
- Transportation
- feedback forms
- opt in or out of these cookies
- "Do Not Sell My Personal Information"
- privacy policy
- Full copyright notice and terms of use
- Communications
- Computers
- Electricity & electronics
- Energy
- Engineering
- Environment
- Gadgets
- Home life
- Materials
- Science
- Tools & instruments
- Transportation
- A-Z index
- Send feedback
- Random article
- Timeline
- Teaching guide
- About us
- Privacy & cookies
Externals
16- https://www.twitter.com/home?status=I+am+reading+https%3A%2F%2Fwww.explainthatstuff.com%2F
- https://api.whatsapp.com/send?text=https%3A%2F%2Fwww.explainthatstuff.com%2F
- https://www.facebook.com/sharer.php?u=https%3A%2F%2Fwww.explainthatstuff.com%2F
- dozens of books
- over 2000 academic papers and patents
- our friendly Facebook page
- Flickr
- https://www.facebook.com/explainthatstuff/
- http://www.flickr.com/photos/explainthatstuff
- https://www.facebook.com/sharer.php?u=https%3A%2F%2Fwww.explainthatstuff.com%2F
- https://api.whatsapp.com/send?text=Take%20a%20%20look%20at%20https%3A%2F%2Fwww.explainthatstuff.com%2F
- https://reddit.com/submit?url=https%3A%2F%2Fwww.explainthatstuff.com%2F
- http://www.google.com/bookmarks/mark?op=edit&bkmk=https%3A%2F%2Fwww.explainthatstuff.com%2F
- https://www.twitter.com/home?status=I+am+reading+https%3A%2F%2Fwww.explainthatstuff.com%2F
- mailto:?subject=Thought%20you%20might%20like%20this&body=Take%20a%20look%20at%20this%20page:%20https%3A%2F%2Fwww.explainthatstuff.com%2F
Language
The webpage does not have a language declared.
Favicon
The webpage has a favicon.
https://cdn4.explainthatstuff.com/ets-favicon-96x96.png
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.27 seconds.
Page size
The size of the HTML webpage is 13,897.00.
HTTP requests
There are fewer than 18 HTTP requests on the webpage.
Images
17- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/ccd-chip4.jpg
- https://cdn4.explainthatstuff.com/breathless-chris-woodford-198x300.png
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/optical-mouse-light-guide.jpg
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
Iframes
1- https://www.facebook.com/plugins/like.php?href=https%3A%2F%2Fwww.explainthatstuff.com%2F&width=90&layout=button_count&action=like&size=small&share=false&height=21&appId=1678539732394615
Image format
There are 57 images that are not using the AVIF, WebP format.
Images
57- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/ccd-chip4.jpg
- https://cdn4.explainthatstuff.com/breathless-chris-woodford-198x300.png
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/icon-az.png
- https://cdn4.explainthatstuff.com/icon-dates.png
- https://cdn4.explainthatstuff.com/icon-dice.png
- https://cdn4.explainthatstuff.com/icon-search.png
- https://cdn4.explainthatstuff.com/icon-ets.png
- https://cdn4.explainthatstuff.com/nasa-airs-warming-thumb.jpg
- https://cdn4.explainthatstuff.com/thumb-heat-pump.png
- https://cdn4.explainthatstuff.com/thumb-atoms.png
- https://cdn4.explainthatstuff.com/thumb-offsets.jpg
- https://cdn4.explainthatstuff.com/thumb-mirror-segments-james-webb.jpg
- https://cdn4.explainthatstuff.com/chess-game-middle-thumb.jpg
- https://cdn4.explainthatstuff.com/weightless-astronauts-vomit-comet-thumb.jpg
- https://cdn4.explainthatstuff.com/thumb-shuttle.jpg
- https://cdn4.explainthatstuff.com/crane-pulleys-red-thumb.jpg
- https://cdn4.explainthatstuff.com/aristotle-freeze-highsmith-thumb.jpg
- https://cdn4.explainthatstuff.com/computer-software-dvd-thumb.jpg
- https://cdn4.explainthatstuff.com/silverback-gorilla-bamboo-thumb.jpg
- https://cdn4.explainthatstuff.com/nasa-blue-organisms-lighting-thumb.jpg
- https://cdn4.explainthatstuff.com/radio-thumb.jpg
- https://cdn4.explainthatstuff.com/crop-spraying-tractor-thumb.jpg
- https://cdn4.explainthatstuff.com/electricity-plug-thumb.jpg
- https://cdn4.explainthatstuff.com/atomic-force-microscope-tips-thumb.jpg
- https://cdn4.explainthatstuff.com/magnet-big-thumb.jpg
- https://cdn4.explainthatstuff.com/rackandpiniongear-thumb.jpg
- https://cdn4.explainthatstuff.com/batteries-thumb.jpg
- https://cdn4.explainthatstuff.com/electric-motor-closeup-thumb.jpg
- https://cdn4.explainthatstuff.com/nasa-airs-warming-thumb.jpg
- https://cdn4.explainthatstuff.com/google-apps-smartphone-screen-thumb.jpg
- https://cdn4.explainthatstuff.com/digitalcamera-thumb.jpg
- https://cdn4.explainthatstuff.com/integrated-circuit-microcontroller-thumb.jpg
- https://cdn4.explainthatstuff.com/digital-multimeter-thumb.jpg
- https://cdn4.explainthatstuff.com/bluegasflameenergy-thumb.jpg
- https://cdn4.explainthatstuff.com/spring-arch-fingers-thumb.jpg
- https://cdn4.explainthatstuff.com/organicbox-thumb.jpg
- https://cdn4.explainthatstuff.com/sony-bravia-flatscreen-tv-thumb.jpg
- https://cdn4.explainthatstuff.com/solar-control-low-e-glass-thumb.jpg
- https://cdn4.explainthatstuff.com/steel-framed-building-construction-thumb.jpg
- https://cdn4.explainthatstuff.com/soap-bubble-color-interference-thumb.jpg
- https://cdn4.explainthatstuff.com/hydraulicdigger2-thumb.jpg
- https://cdn4.explainthatstuff.com/c17globemasterplane-thumb.jpg
- https://cdn4.explainthatstuff.com/optical-mouse-light-guide.jpg
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
- https://cdn4.explainthatstuff.com/dot.gif
JavaScript defer
The javascript resources have the defer attribute set.
DOM size
The DOM size is optimal.
The HTML file has 428 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://www.explainthatstuff.com/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage has a public server signature.
Apache
Unsafe cross-origin links
The webpage does not have unsafe cross-origin links.
Plaintext email
The webpage does not contain any plaintext emails.
Miscellaneous
Structured data
The webpage has structured data.
Open Graph
6Schema.org
9
Meta viewport
The webpage has a meta viewport tag set.
width=device-width, initial-scale=1.0
Character set
The webpage does not have a charset declared.
Sitemap
No sitemaps found.
Social
The webpage has 6 social links.
Twitter
2
Content length
The webpage has 1,860 words.
Text to HTML ratio
The text to HTML ratio is 23%.
Inline CSS
The webpage does not contain inline CSS code.
Deprecated HTML
There are no deprecated HTML tags on the webpage.