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SEO Report for

November 25, 2019 9:44 AM
Desktop screen Desktop screenshot for

9 criteria passed
2 criteria to solve


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• Category
Technology & Computing  >  C / C++
• Online since
December 26, 2002 (explore Wayback Machine)
• Age
18 years, 5 months, 28 days
• Alexa Rank
#40.294, 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 COMODO CA Limited has expired on September 21, 2020.
Title Tag - Regex Tutorial, Examples and Reference - Regexp Patterns
Length: 83 (recommended: 10 to 70)
Meta Description
At you will find a wide range of in-depth information about a powerful search pattern language called regular expressions.
Length: 147 (recommended: 50 to 160)
Google preview
Desktop Version - Regex Tutorial, Examples and Reference - Re...

At you will find a wide range of in-depth information about a powerful search pattern language called regular expressions.

Mobile Version

Favicon for - Regex Tutorial, Examples and Reference - Re...

At you will find a wide range of in-depth information about a powerful search pattern language called reg...

Great, language/character encoding is specified: utf-8
URL Parameters
Great, the domain URLs look clean.
Attribute Value
viewport width=device-width, initial-scale=1
author Jan Goyvaerts


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.

Pattern language Confidence: 88% Arrow up

A pattern language is a method of describing good design practices or patterns of useful organization within a field of expertise.

The term was coined by architect Christopher Alexander and popularized by his 1977 book A Pattern Language.

Regular expression Confidence: 80% Arrow up

A regular expression, regex or regexp (sometimes called a rational expression) is, in theoretical computer science and formal language theory, a sequence of characters that define a search pattern.

Usually this pattern is then used by string searching algorithms for "find" or "find and replace" operations on strings.

Pattern Confidence: 68% Arrow
Information Confidence: 67% Arrow
Reference (computer science) Confidence: 67% Arrow

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 1.4 seconds.

Speed Percentile

64% is faster than approximately 64 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 #40.294 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: 8 countries
  • Flag for IndiaIndia (16.3%)
  • Flag for United States of AmericaUnited States of America (30.3%)
  • Flag for Iran (Islamic Republic of)Iran (Islamic Republic of) (6.1%)
  • Flag for BrazilBrazil (4.1%)
  • Flag for CanadaCanada (5.2%)
  • Flaf icon for other countryOthers (38%)

Traffic country ranks

Country Rank
Flag for Viet NamViet Nam #12.834
Flag for IndiaIndia #21.316
Flag for EgyptEgypt #35.705
Flag for TurkeyTurkey #30.857
Flag for United States of AmericaUnited States of America #29.531


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
  • 39% #ffffff
  • 19% #f0f0f0
  • 8% #903010
  • 6% #a04020
  • 3% #fffff0
  • 2% #e0c0b0
  • 2% #e0d0c0
  • 2% #b06040
  • 2% #fff0f0
  • 1% #a05040
  • 1% #905030
  • 1% #b08030

Text/code ratio's text/code ratio is 29.31%. You're good to go!
Text / Code Ratio 29.31%

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> 7
  • <H3> 0
  • <H4> 0
  • <H5> 0
  • <H6> 0
Top level heading
Welcome to regular-expressions.infothe premier website about regular expressions
2nd level heading
Regular expressions quick start
Complete regular expressions tutorial
Replacement strings tutorial
Applications & languages that support regexes
Not only for programmers
Alt attributes Arrow up

We found 2 images on this website.
Great, 0 ALT attributes are missing on your image tags.


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

It's a good start.

You should focus on obtaining more social shares to improve your overall SEO strategy. Check out these tips to build a better social media presence.

  • Facebook iconFacebook
  • Total Engagement 38
  • Likes 13
  • Shares 19
  • Comments 6
  • Pinterest iconPinterest 0
  • Linkedin iconLinkedin 0
  • Stumbleupon iconStumbleupon 0


Domain Registrar NAMECHEAP, INC
Registration Date 12/26/2002 18 years, 5 months, 28 days ago
Last Modified 09/26/2018 2 years, 8 months, 29 days ago
Nameservers Arrow up
Host IP Address Country Flag for United StatesUnited States Flag for United StatesUnited States


Server map
  • Service Provider (ISP)
  • pair Networks
  • IP Address
  • Country
  • Flag for United StatesUnited States
  • Region
  • Pennsylvania , Pittsburgh
  • Latitude and Longitude
  • 40.4299 : -79.9698