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Search Engine Optimization Overview
83
100
Duolingo
Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!
https://www.duolingo.com/
2 high issues
6.1%
2 medium issues
6.1%
3 low issues
9.1%
26 tests passed
78.8%
0.38 seconds
3.14 kB
13 resources
Secure
Seo
Title
The title tag is perfect.
Duolingo
Meta description
The meta description tag is good.
Duolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!
Headings
There is no h1 tag on the webpage.
Content keywords
No relevant keywords found on the webpage.
duolingo
Image keywords
All images have alt attributes set.
SEO friendly URL
The URL is SEO friendly.
https://www.duolingo.com/
404 page
The website has 404 error pages.
https://www.duolingo.com/404-e89d4841c0fd3b4d33f7f888bbb8bb8b
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.
Language
The webpage does not have a language declared.
Favicon
The webpage has a favicon.
https://d35aaqx5ub95lt.cloudfront.net/favicon.ico
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.38 seconds.
Page size
The size of the HTML webpage is 3,141.00.
HTTP requests
There are fewer than 13 HTTP requests on the webpage.
  1. https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
  2. https://s.lmepbq.com/ag/891112/clear.js?ck=7137062a-c2ca-49da-b5eb-e3f686fb953c&spa=1&dt=8911121635444670059000&mo=2&pd=acc
  3. https://d35aaqx5ub95lt.cloudfront.net/js/manifest-da126c64.js
  4. https://d35aaqx5ub95lt.cloudfront.net/js/features-f29cd808.js
  5. https://d35aaqx5ub95lt.cloudfront.net/js/1374-596d8a2b.js
  6. https://d35aaqx5ub95lt.cloudfront.net/js/polyfills-a5c3c1f6.js
  7. https://d35aaqx5ub95lt.cloudfront.net/js/9819-2687dd1b.js
  8. https://d35aaqx5ub95lt.cloudfront.net/js/strings/en-1644a48e.js
  9. https://d35aaqx5ub95lt.cloudfront.net/js/3496-f8589a03.js
  10. https://d35aaqx5ub95lt.cloudfront.net/js/app-ff53bd96.js
  1. https://d35aaqx5ub95lt.cloudfront.net/css/3496-3137d13f.css
  2. https://d35aaqx5ub95lt.cloudfront.net/css/app-a8950075.css
  1. https://www.googletagmanager.com/ns.html?id=GTM-TX6Z97C
Image format
The images are served in the AVIF, WebP format.
JavaScript defer
The are 1 javascript resources without the defer attribute.
  1. https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
DOM size
The DOM size is optimal.
The HTML file has 82 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://www.duolingo.com/ DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage has a public server signature.
duo-api
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.
      Meta viewport
      The webpage has a meta viewport tag set.
      width=device-width,initial-scale=1,user-scalable=no
      Character set
      The webpage has a charset value set.
      utf-8
      Sitemap
      The website has sitemaps.
      1. https://www.duolingo.com/sitemap_index.xml
      Social
      The webpage does not contain any social links.
      Content length
      The are less than 500 words on the webpage.
      The webpage has 240 words.
      Text to HTML ratio
      The text to HTML ratio is 20%.
      Inline CSS
      The webpage does not contain inline CSS code.
      Deprecated HTML
      There are no deprecated HTML tags on the webpage.