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Report generated 2 years ago
https://www.w3schools.com/html/html_images.asp
Your general SEO Checkup Score
Archived
87/100
SEO Score
Average SEO score of top 100 sites: 75%
This website received an SEO score of 87 out of 100, which is higher than the average score of 75. Our analysis has identified 17 important issues that can be addressed to further enhance your website's performance and improve its search engine visibility.
17 Failed
5 Warnings
50 Passed
Issues to fix
HIGH
It is recommended to avoid URL parameters and to use hyphens to separate words in the URL structure, rather than underscores.
HIGH
Consider using structured data in your webpage as it can help search engines gain a better understanding of your content.
HIGH
To improve the website experience for your visitors, it is recommended to eliminate any render-blocking resources on this webpage.
HIGH
Using images in a modern format can significantly reduce the file size and improve the loading speed of a webpage, providing a better user experience and potentially increasing engagement.
HIGH
Users may abandon pages that take longer than 5 seconds to load, resulting in a potential loss of up to 50% of visitors. Faster loading pages can lead to increased traffic, better conversions, and higher sales.
HIGH
Consider reducing the HTML size to improve loading times and retain visitors.
MEDIUM
Add a sitemap file to help search engine crawlers index content more thoroughly and quickly.
MEDIUM
Reducing the JavaScript execution time can result in faster page load times and a smoother user experience, as it allows the browser to render and display the page more quickly.
MEDIUM
Reducing the Document Object Model (DOM) size can lead to faster page loading times, improved site performance, and better user experience by decreasing the amount of time it takes for the browser to process and render the page.
MEDIUM
Avoid performance and security issues by adding "rel=noopener" or "rel=noreferrer" to your "target=_blank" links.
LOW
A proper character encoding declaration ensures that all characters, including non-ASCII characters, are displayed correctly in the browser, improving the readability and usability of the webpage.
LOW
Resolving errors identified by the Chrome DevTools Console can improve user experience.
LOW
For security reasons, it is recommended to turn off the server signature.
LOW
To protect against spam harvesters, consider hiding or obfuscating email addresses in your page code.
LOW
Using more than 20 HTTP requests on a webpage can negatively impact the loading time.
LOW
Consider moving inline CSS styles to an external stylesheet to improve site performance and maintain separation of content and design.
LOW
Consider adding the Strict-Transport-Security header to your webpage to ensure that web traffic is encrypted over HTTPS, mitigating the risk of man-in-the-middle attacks and other security threats.
Common SEO issues
Score: 79
Failed: 3
Warnings: 2
Passed: 17
Meta Title Test100% of top 100 sites passed
  • This webpage is using a title tag with a length of 11 characters. While there's no target number of characters, titles should be descriptive and concise. Using a title tag with less than 20 characters is a missed opportunity since it can be difficult to fit all your targeted keywords in such a short text.
    We recommend using a title with a length between 20 - 60 characters in order to fit Google Search results that have a 600-pixel limit.
Text: HTML Images
Length: 11 characters
Meta Description Test96% of top 100 sites passed
  • This webpage is using a meta description tag.
Text: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Length: 168 characters
Google Search Results Preview Test
Desktop version
https://www.w3schools.com/html/html_images.aspHTML ImagesWell organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Mobile version
https://www.w3schools.com/html/html_images.aspHTML ImagesWell organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Social Media Meta Tags Test89% of top 100 sites passed
  • This webpage is using social media meta tags.
Open Graph Meta Tags
og:image
https://www.w3schools.com/images/w3schools_logo_436_2.png
og:image:type
image/png
og:image:width
436
og:image:height
228
og:description
W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.
Most Common Keywords Test
  • There is likely no optimal keyword density (search engine algorithms have evolved beyond keyword density metrics as a significant ranking factor). It can be useful, however, to note which keywords appear most often on your page and if they reflect the intended topic of your page. More importantly, the keywords on your page should appear within natural sounding and grammatically correct copy.
119html87tutorial77learn53certificate40image
Keywords Usage Test45% of top 100 sites passed
  • The most common keywords of this webpage are distributed well across the important HTML tags. This helps search engines to properly identify the topic of this webpage.
Keyword
Title tag
Meta description
Headings
html
tutorial
learn
certificate
image
Keywords Cloud Test
accessaccessibilityadvertisementanalyticsattributeattributesbackendbootstrapbrowserbuildingcanvascertificatecertificatescertifiedchaniachatgptcodecolorscoursecreatecyberdefinedefinesdesigndevelopmentdjangoeditorerrorexampleexamplesexcelexerciseexercisesfilefilterfloatflowersfreegamegoalgooglegraphicshaveheighthtmliconimageimagesinputjavajavascriptjoinjquerykotlinlearnlearningleftlinklistsmediamysqlnewsletternumpypagepandasplaypythonquizreactreferencereferencesrequiredrightsciencescipysecurityserverservicessheetssignsizesmileyspacesspeedstartstatisticsstyletabletemplatestesttexttutorialtutorialstypescripttypinguserusingvaluewebsitewidth
Competitor Domains Test
Understand your competitors' SEO and backlink profile

Get related competitors and their domain authority score in relation to your domain.

Heading Tags Test59% of top 100 sites passed
  • This webpage contains too many H2 tags! H2 tags should re-inforce the related content of your page to search engines - too many tags may make the topic less clear, or look like spam tactics. Consider using less than 10 H2 tags.
H1 tags
HTML Images
H2 tags
Tutorials
Exercises
Certificates
All Our Services
HTML Tutorial
HTML Forms
HTML Graphics
HTML Media
HTML APIs
HTML Examples
HTML References
HTML Images Syntax
The src Attribute
The alt Attribute
Image Size - Width and Height
Width and Height, or Style?
Images in Another Folder
Images on Another Server/Website
Animated Images
Image as a Link
Image Floating
Common Image Formats
Chapter Summary
HTML Exercises
Test Yourself With Exercises
Exercise:
HTML Image Tags
Report Error
Robots.txt Test99% of top 100 sites passed
  • This website is using a robots.txt file.
https://www.w3schools.com/robots.txt
Sitemap Test74% of top 100 sites passed
  • This website lacks a sitemap file! Sitemaps can help robots index your content more thoroughly and quickly. Read more on Google's guidelines for implementing the sitemap protocol.
Image Alt Test71% of top 100 sites passed
  • All "img" tags from this webpage have the required "alt" attribute.
Responsive Image Test28% of top 100 sites passed
  • All images in this webpage are properly sized for different users' viewports.
Image Aspect Ratio Test75% of top 100 sites passed
  • All image display dimensions match the natural aspect ratio.
Deprecated HTML Tags Test94% of top 100 sites passed
  • This webpage does not use HTML deprecated tags.
Google Analytics Test65% of top 100 sites passed
  • This webpage is using Google Analytics.
Favicon Test100% of top 100 sites passed
  • favicon
    This website appears to have a favicon.
JS Error Test79% of top 100 sites passed
  • There are no severe JavaScript errors on this webpage.
Console Errors Test41% of top 100 sites passed
  • This webpage has some errors caught by the Chrome DevTools Console!
See results list
Charset Declaration Test100% of top 100 sites passed
  • This webpage has a meta charset tag but is not fully contained in the first 1024 bytes of the HTML document! The element containing the character encoding declaration must be serialized completely within the first 1024 bytes of the document, otherwise it can significantly affect load performance.
Speed optimizations
Score: 66
Failed: 7
Warnings: 0
Passed: 13
HTML Page Size Test21% of top 100 sites passed
DOM Size Test54% of top 100 sites passed
  • The Document Object Model (DOM) of this webpage has 2,063 nodes which is greater than the recommended value of 1,500 nodes! A large DOM size negatively affects site performance and increases the page load time.
HTML Compression/GZIP Test97% of top 100 sites passed
  • This webpage is successfully compressed using gzip compression on your code. The HTML code is compressed from 340.65 Kb to 50.95 Kb (85% size savings). This helps ensure a faster loading webpage and improved user experience.
Site Loading Speed Test66% of top 100 sites passed
  • The loading time of this webpage (measured from N. Virginia, US) is around 17.71 seconds and is greater than the average loading speed which is 5 seconds!
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JS Execution Time Test71% of top 100 sites passed
  • The JavaScript code used by this webpage is executed in more than 3.5 seconds! When the JavaScript code takes a long time to execute, it slows down the page performance in several ways: longer download times, main thread bottlenecks, delays of "Time To Interactive", memory leaks, etc.
Page Objects Test
  • This webpage is using more than 20 http requests, which can slow down page loading and negatively impact user experience!
Content size by content type
Content type
Percent
Size
javascript
67.0 %
3.05 Mb
image
20.5 %
958.28 Kb
html
5.1 %
239.02 Kb
font
4.4 %
205.51 Kb
other
2.4 %
111.58 Kb
css
0.6 %
25.92 Kb
TOTAL
100%
4.56 Mb
Requests by content type
Content type
Percent
Requests
image
46.3 %
291
other
21.8 %
137
javascript
17.4 %
109
html
12.3 %
77
font
1.3 %
8
css
1.0 %
6
TOTAL
100%
628
Content size by domain
Domain
Percent
Size
cdata.carambo.la
25.7 %
1.17 Mb
w3schools.com
16.3 %
759.23 Kb
securepubads.g.doubleclick.net
7.2 %
338.18 Kb
cdn.snigelweb.com
4.6 %
214.17 Kb
tpc.googlesyndication.com
4.5 %
211.50 Kb
media.carambo.la
4.0 %
187.55 Kb
googletagmanager.com
3.5 %
165.40 Kb
ads.pubmatic.com
3.4 %
157.85 Kb
player.aniview.com
3.2 %
150.81 Kb
cdn-sic.33across.com
2.6 %
119.59 Kb
Other
25.0 %
1.14 Mb
TOTAL
100%
4.56 Mb
Requests by domain
Domain
Percent
Requests
events-ssc.33across.com
6.4 %
40
us-u.openx.net
5.6 %
35
s.amazon-adsystem.com
4.5 %
28
w3schools.com
4.3 %
27
ce.lijit.com
4.3 %
27
cs.minutemedia-prebid.com
3.2 %
20
usersync.gumgum.com
2.4 %
15
simage2.pubmatic.com
2.2 %
14
ssc.33across.com
1.9 %
12
ads.pubmatic.com
1.8 %
11
Other
63.5 %
399
TOTAL
100%
628
CDN Usage Test97% of top 100 sites passed
  • This webpage is serving all images, javascript and css resources from CDNs.
See results list
Modern Image Format Test38% of top 100 sites passed
  • This webpage is not serving images in a modern format! Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.
See results list
Image Metadata Test72% of top 100 sites passed
  • This webpage is not using images with large metadata.
Image Caching Test97% of top 100 sites passed
  • This website is using cache headers for images and the browsers will display these images from the cache.
JavaScript Caching Test95% of top 100 sites passed
  • This webpage is using cache headers for all JavaScript resources.
CSS Caching Test96% of top 100 sites passed
  • This webpage is using cache headers for all CSS resources.
JavaScript Minification Test96% of top 100 sites passed
  • All JavaScript files used by this webpage are minified.
See results list
CSS Minification Test100% of top 100 sites passed
  • All CSS resources used by this webpage are minified.
See results list
Render Blocking Resources Test10% of top 100 sites passed
  • This webpage is using render blocking resources! Eliminating render-blocking resources can help this webpage to load significantly faster and will improve the website experience for your visitors.
See results list
URL Redirects Test98% of top 100 sites passed
  • This URL doesn't have any redirects (which could potentially cause site indexation issues and site loading delays).
Time To First Byte Test98% of top 100 sites passed
  • The Time To First Byte value of this webpage is 0.020 seconds. To provide a good user experience, Google recommends that sites should strive to have a TTFB of 0.8 seconds or less.

0.02 s

0.8 s

1.8 s

First Contentful Paint Test94% of top 100 sites passed
  • The First Contentful Paint value of this webpage is 0.303 seconds. To provide a good user experience, Google recommends that sites should strive to have a First Contentful Paint value of 1.8 seconds or less.

0.303 s

1.8 s

3 s

Largest Contentful Paint Test90% of top 100 sites passed
  • The Largest Contentful Paint duration of this webpage is 0.62 seconds. To provide a good user experience, Google recommends that sites should strive to have Largest Contentful Paint of 2.5 seconds or less.

0.62 s

2.5 s

4 s

Largest Contentful Paint element within the viewport:
<div class="w3-col m4" style="background-image:url('pic_trulli.jpg');background-...">
Cumulative Layout Shift Test94% of top 100 sites passed
  • The CLS score of this webpage is 0.0041. To provide a good user experience, Google recommends that sites should strive to have a CLS score of 0.1 or less.

0.0041

0.1

0.25

DOM element which contributes the most to CLS score:
Text: HTML Block & Inline
Html: <a target="_top" href="html_blocks.asp">
Score: 0.0041
Server and security
Score: 61
Failed: 3
Warnings: 2
Passed: 2
URL Canonicalization Test97% of top 100 sites passed
SSL Checker and HTTPS Test100% of top 100 sites passed
  • This website is successfully using the HTTPS protocol, but the SSL Certificate will expire in less than a month! Having an up-to-date certificate is an important security practice to ensure that your website is safe and provides trust, and any communication between the user's browser and your website (such as passwords, credit cards, or forms) is encrypted and private.

The certificate is not used before the activation date.

The certificate will expire in less than a month!

The hostname "www.w3schools.com" is correctly listed in the certificate.

The certificate should be trusted by all major web browsers.

The certificate was not revoked.

The certificate was signed with a secure hash.

Certificate Chain:
Server certificate
Common name
*.w3schools.com
Organization
Edgecast Inc.
Location
Los Angeles, California, US
Subject Alternative Names (SANs)
*.w3schools.com, w3schools.com
Not valid before
Sun, March 5o 2023, 12:00:00 am (z)
Not valid after
Thu, April 4o 2024, 11:59:59 pm (z)
Signature algorithm
sha256WithRsaEncryption
Issuer
DigiCert TLS RSA SHA256 2020 CA1
Intermediate certificate
Common name
DigiCert TLS RSA SHA256 2020 CA1
Organization
DigiCert Inc
Location
US
Not valid before
Wed, April 14o 2021, 12:00:00 am (z)
Not valid after
Sun, April 13o 2031, 11:59:59 pm (z)
Signature algorithm
sha256WithRsaEncryption
Issuer
DigiCert Global Root CA
Root certificate
Common name
DigiCert Global Root CA
Organization
DigiCert Inc
Location
US
Not valid before
Fri, November 10o 2006, 12:00:00 am (z)
Not valid after
Mon, November 10o 2031, 12:00:00 am (z)
Signature algorithm
sha1WithRsaEncryption
Issuer
DigiCert Global Root CA
Mixed Content Test (HTTP over HTTPS)98% of top 100 sites passed
  • This webpage does not use mixed content - both the initial HTML and all other resources are loaded over HTTPS.
HTTP2 Test100% of top 100 sites passed
  • This webpage is using the HTTP/2 protocol but not all resources are served over this protocol!
See results list
HSTS Test82% of top 100 sites passed
  • This webpage is not using the Strict-Transport-Security header! This is a security header that was created as a way to force the browser to use secure connections when a site is running over HTTPS.
Plaintext Emails Test100% of top 100 sites passed
  • We've found 1 email addresses in your page code! We advise you to protect email links in a way that hides them from the spam harvesters.
Mobile usability
Score: 100
Failed: 0
Warnings: 0
Passed: 3
Meta Viewport Test88% of top 100 sites passed
  • This webpage is using a viewport meta tag.
<meta name="viewport" content="width=device-width, initial-scale=1" />
Media Query Responsive Test98% of top 100 sites passed
  • This webpage is using CSS media queries, which is the base for responsive design functionalities.
Mobile Snapshot Test
Mobile view
Advanced SEO
Score: 67
Failed: 1
Warnings: 1
Passed: 7
Structured Data Test53% of top 100 sites passed
Custom 404 Error Page Test67% of top 100 sites passed
  • This website is using a custom 404 error page. We recommend to have a custom 404 error page in order to improve the website's user experience by letting users know that only a specific page is missing/broken (and not the entire site), providing them helpful links, the opportunity to report bugs, and potentially track the source of broken links.
Noindex Tag Test98% of top 100 sites passed
  • This webpage does not use the noindex meta tag. This means that it can be indexed by search engines.
Canonical Tag Test93% of top 100 sites passed
  • This webpage does not use the canonical link tag.
Nofollow Tag Test
  • This webpage does not use the nofollow meta tag. This means that search engines will crawl all links from this webpage.
Disallow Directive Test
  • Your robots.txt file includes a disallow command which instructs search engines to avoid certain parts of your website! You are advised to confirm if access to these resources or pages are intended to be blocked (e.g., if they contain internal-only content or sensitive information).
See results list
Meta Refresh Test96% of top 100 sites passed
  • This webpage is not using a meta refresh tag.
SPF Records Test95% of top 100 sites passed
  • This DNS server is using an SPF record.
v=spf1 include:_spf.google.com include:amazonses.com include:spf.sendinblue.com include:shops.shopify.com include:mail.zendesk.com ip4:148.122.215.227 -all
Ads.txt Validation Test68% of top 100 sites passed
  • This website is using an Authorized Digital Sellers (ads.txt) file, but it contains duplicated or invalid records! These warnings highlight points of concern which should not affect the processing of the authorized sellers list, but which should be resolved as soon as possible.
See results list
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