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SEO Report for

January 12, 2020 12:33 AM
Desktop screen Desktop screenshot for

10 criteria passed
1 criteria to solve


Fill the missing alt attributes on your images.


• Category
Technology & Computing  >  JavaScript
• Online since
February 17, 2012 (explore Wayback Machine)
• Age
8 years, 7 months, 15 days
• Alexa Rank
#29.907, is in the world's top 50.000 websites!


Representation of an online Form

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SSL Certificate
This website is not SSL secured (HTTPS), the certificate issued by Let's Encrypt has expired on March 28, 2020.
Title Tag
Derivative Calculator • With Steps!
Length: 37 (recommended: 10 to 70)
Meta Description
Solve derivatives using this free online calculator. Step-by-step solution and graphs included!
Length: 95 (recommended: 50 to 160)
Google preview
Desktop Version

Derivative Calculator • With Steps!

Solve derivatives using this free online calculator. Step-by-step solution and graphs included!

Mobile Version

Favicon for

Derivative Calculator • With Steps!

Solve derivatives using this free online calculator. Step-by-step solution and graphs included!

Great, language/character encoding is specified: utf-8
URL Parameters
Great, the domain URLs look clean.
Attribute Value
viewport width=1280


The owner has associated the following topics to the website.

The results of our semantic analysis are shown below using the website's language.

They are the main concepts covered by

Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.

Calculator Confidence: 76% Arrow up

An electronic calculator is a small, portable electronic device used to perform operations ranging from basic arithmetic to complex mathematics.

Derivative Confidence: 72% Arrow up

The derivative of a function of a real variable measures the sensitivity to change of the function value with respect to a change in its argument (input value).

Derivatives are a fundamental tool of calculus.

For example, the derivative of the position of a moving object with respect to time is the object's velocity: this measures how quickly the position of the object changes when time advances.

Graph (discrete mathematics) Confidence: 68% Arrow up

In mathematics, and more specifically in graph theory, a graph is a structure amounting to a set of objects in which some pairs of the objects are in some sense "related".

The objects correspond to mathematical abstractions called vertices (also called nodes or points) and each of the related pairs of vertices is called an edge (also called an arc or line).

Typically, a graph is depicted in diagrammatic form as a set of dots for the vertices, joined by lines or curves for the edges.

Graphs are one of the objects of study in discrete mathematics.

WEBSITE SPEED website speed is fast. Page speed is important for visitors and search engines.

Get insights to improve your page loading time.

Page Loading Time


This domain loads at the median speed of 2.5 seconds.

Speed Percentile

35% is faster than approximately 35 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.

A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.


This website is ranked #29.907 by Alexa.

This rank is traffic based. The lower the rank is, the better the domain is ranked.

Alexa data for

Daily visitors by country

  • daily visitors distribution - Total: 11 countries
  • Flag for IndiaIndia (3.7%)
  • Flag for EgyptEgypt (3.0%)
  • Flag for MalaysiaMalaysia (3.4%)
  • Flag for United States of AmericaUnited States of America (37.1%)
  • Flag for United Kingdom of Great Britain and Northern IrelandUnited Kingdom of Great Britain and Northern Ireland (21.2%)
  • Flag for BrazilBrazil (5.6%)
  • Flag for CanadaCanada (3.8%)
  • Flaf icon for other countryOthers (22.2%)

Traffic country ranks

Country Rank
Flag for IndiaIndia #111.144
Flag for EgyptEgypt #17.109
Flag for TurkeyTurkey #63.747
Flag for MalaysiaMalaysia #7.842
Flag for Russian FederationRussian Federation #92.802


Doctype HTML5 Arrow Responsive website, mobile-friendly. Arrow

Mobile Rendering

This website seems to be optimized for Mobile Visitors.

How looks like on a mobile device such as an iPhone.

How looks like on a tablet such as an iPad.

Main colors used

These are the main HTML color codes used by this website. Arrow
  • 30% #e0f0ff
  • 18% #e0e0f0
  • 13% #ffffff
  • 13% #f0f0f0
  • 8% #d0e0e0
  • 6% #b0c0d0
  • 3% #d0e0f0
  • 3% #f0ffff
  • 1% #fffff0
  • 0% #fff0ff
  • 0% #7090a0
  • 0% #a0c0d0

Text/code ratio's text/code ratio is 5.36%. It's a bit low. Consider raising it by adding more text content of value for your visitors, or keeping your code clean.
Text / Code Ratio 5.36%

A good text to HTML ratio is anywhere from 25 to 70%.

This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.

Main HTML tags

Headings Arrow up

Great, we found headings on this page.

  • <H1> 1
  • <H2> 1
  • <H3> 5
  • <H4> 1
  • <H5> 0
  • <H6> 0
Top level heading
Derivative calculator
2nd level heading
Calculate derivatives online — with steps and graphing!
3rd level heading
Calculate the derivative of … enter your own answer:
Recommend this website
Book recommendation
How the derivative calculator works
4th level heading
Calculus for dummies (2nd edition)
Alt attributes Arrow up

We found 12 images on this website.
10 ALT attributes are missing on your image tags.

Image Image URL Occurrences
- data:image/webp;base64,UklGRvIKAABXRUJQVlA4TOYKAAAvLoALEFXZrbZtmSTnXQZXzMzMDO4yMzMzc4NwmZmZmZmZGYeZG... 1
- data:image/webp;base64,UklGRnQCAABXRUJQVlA4IGgCAADwDQCdASpAADAAPm00lkikIqIhIqlwgA2JbAC2/CaD56f OX4gb... 1
- data:image/webp;base64,UklGRogBAABXRUJQVlA4IHwBAAAwCwCdASpAADAAPmkskEWkIqGaqwQAQAaEsgBpjdWGG9G/ED8Zg... 1
Image with missing alt attribute found on layout/xkeyboard-show.png,q1501768216.pagespeed.ic.BXKxbdm9u3.webp 1
Image with missing alt attribute found on layout/xkeyboard-hide.png,q1501768199.pagespeed.ic.dxl2N8J6H2.webp 1

Alternative text allows you to add a description to an image.

Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.

It looks like you're missing alternative text for 10 images on Check your website to make sure it's specified for each image on the page.


This is an overview of your homepage shares on social networks.

You have a relatively high presence on social media, keep going!

The more people share your website, the more likely you will get links from others, which is a key point when it comes to improving your overall search engine rankings.

  • Facebook iconFacebook
  • Total Engagement 1.064
  • Likes 370
  • Shares 426
  • Comments 268
  • Pinterest iconPinterest 0
  • Linkedin iconLinkedin 0
  • Stumbleupon iconStumbleupon 0


Domain Registrar INWX GMBH & CO. KG
Registration Date 02/17/2012 8 years, 7 months, 15 days ago
Last Modified 02/18/2019 1 year, 7 months, 13 days ago
Expiration Date 02/17/2020 Expired
Nameservers Arrow up
Host IP Address Country Flag for AustriaAustria Flag for AustriaAustria Flag for GermanyGermany


Server map
  • Service Provider (ISP)
  • Hetzner Online GmbH
  • IP Address
  • Country
  • Flag for GermanyGermany
  • Region
  • Bavaria , Falkenstein
  • Latitude and Longitude
  • 49.0976 : 12.4869