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Search Engine Optimization Overview
66
100
https://www.sigmaaldrich.com/US/en
5 high issues
15.2%
2 medium issues
6.1%
2 low issues
6.1%
24 tests passed
72.7%
0.48 seconds
30.52 kB
49 resources
Secure
Seo
Title
The title tag must be between 1 and 60 characters.
Meta description
The meta description tag is missing or empty.
Headings
There is no h1 tag on the webpage.
Content keywords
No relevant keywords found on the webpage.
Image keywords
All images have alt attributes set.
SEO friendly URL
The URL does not contain any relevant keywords.
https://www.sigmaaldrich.com/US/en
404 page
The website has 404 error pages.
https://www.sigmaaldrich.com/404-038d87e14370dd4340d7dd4ef5cf4bea
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 has the language declared.
en
Favicon
The webpage has a favicon.
https://www.sigmaaldrich.com/static/pwa/apple-icon-180.png
Performance
Text compression
The HTML file is compressed.
Load time
The webpage loaded in 0.48 seconds.
Page size
The size of the HTML webpage is 30,516.00.
HTTP requests
There are fewer than 49 HTTP requests on the webpage.
  1. https://www.sigmaaldrich.com/ruxitagentjs_ICA27Vfhjqrux_10251220909040818.js
  2. https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
  3. https://www.sigmaaldrich.com/_next/static/chunks/polyfills-a40ef1678bae11e696dba45124eadd70.js
  4. https://www.sigmaaldrich.com/_next/static/chunks/webpack-fe9e45df64ffb82a.js
  5. https://www.sigmaaldrich.com/_next/static/chunks/framework-1328a7b93c114fec.js
  6. https://www.sigmaaldrich.com/_next/static/chunks/main-d3aa31456a4fcf0b.js
  7. https://www.sigmaaldrich.com/_next/static/chunks/pages/_app-124e39f60b8410ff.js
  8. https://www.sigmaaldrich.com/_next/static/chunks/e223e3cf-d706ea3918042ad4.js
  9. https://www.sigmaaldrich.com/_next/static/chunks/7705-929f1494be11c222.js
  10. https://www.sigmaaldrich.com/_next/static/chunks/500-59a3ad772edafb9c.js
  11. https://www.sigmaaldrich.com/_next/static/chunks/8161-b9c9ae5be4fefece.js
  12. https://www.sigmaaldrich.com/_next/static/chunks/7255-1196d0c5f9183205.js
  13. https://www.sigmaaldrich.com/_next/static/chunks/3219-3cfc6ebd6ea3f451.js
  14. https://www.sigmaaldrich.com/_next/static/chunks/5888-7b38638ba2e91637.js
  15. https://www.sigmaaldrich.com/_next/static/chunks/6898-c23a96816ca22973.js
  16. https://www.sigmaaldrich.com/_next/static/chunks/4872-1413171ff76cf4b6.js
  17. https://www.sigmaaldrich.com/_next/static/chunks/7561-8ea648d2a079ddeb.js
  18. https://www.sigmaaldrich.com/_next/static/chunks/868-5910c067feb7c445.js
  19. https://www.sigmaaldrich.com/_next/static/chunks/3651-e7a47c5101d5e622.js
  20. https://www.sigmaaldrich.com/_next/static/chunks/8893-d10382acf8040c51.js
  21. https://www.sigmaaldrich.com/_next/static/chunks/7340-77f81d1ea1ce5011.js
  22. https://www.sigmaaldrich.com/_next/static/chunks/8401-f6ceaa4223af1f55.js
  23. https://www.sigmaaldrich.com/_next/static/chunks/5410-dd3c1533945ebb57.js
  24. https://www.sigmaaldrich.com/_next/static/chunks/7618-fd984ecb848640bc.js
  25. https://www.sigmaaldrich.com/_next/static/chunks/3692-16f6593a753873ba.js
  26. https://www.sigmaaldrich.com/_next/static/chunks/641-ef2fbf2bf940c980.js
  27. https://www.sigmaaldrich.com/_next/static/chunks/6594-4a419a5476ba84da.js
  28. https://www.sigmaaldrich.com/_next/static/chunks/6492-219d05435cdb6ef6.js
  29. https://www.sigmaaldrich.com/_next/static/chunks/7673-c315c7ebc9df1cdb.js
  30. https://www.sigmaaldrich.com/_next/static/chunks/9803-dcfed3afd6965cb5.js
  31. https://www.sigmaaldrich.com/_next/static/chunks/8417-434a4a3815a45f2f.js
  32. https://www.sigmaaldrich.com/_next/static/chunks/8811-d02521ef22a9a1d7.js
  33. https://www.sigmaaldrich.com/_next/static/chunks/7837-13178039687d229e.js
  34. https://www.sigmaaldrich.com/_next/static/chunks/5644-a333e787986825f0.js
  35. https://www.sigmaaldrich.com/_next/static/chunks/41-194bbd91c08b158b.js
  36. https://www.sigmaaldrich.com/_next/static/chunks/4808-e5d554326a5e0a2b.js
  37. https://www.sigmaaldrich.com/_next/static/chunks/5325-639d0984342ab657.js
  38. https://www.sigmaaldrich.com/_next/static/chunks/4169-ab6517b67e6eed03.js
  39. https://www.sigmaaldrich.com/_next/static/chunks/6233-8cf6043f031173ee.js
  40. https://www.sigmaaldrich.com/_next/static/chunks/1140-1879b4aa5a3512e3.js
  41. https://www.sigmaaldrich.com/_next/static/chunks/7324-594a98fa33464ec9.js
  42. https://www.sigmaaldrich.com/_next/static/chunks/7633-63a3d3196a8eff45.js
  43. https://www.sigmaaldrich.com/_next/static/chunks/2183-c28fbe4e708ee0f8.js
  44. https://www.sigmaaldrich.com/_next/static/chunks/pages/%5Bcountry%5D/%5Blanguage%5D-81396f4b8de70ccc.js
  45. https://www.sigmaaldrich.com/_next/static/ysWkGQG0H5JEVKcBLWLXg/_buildManifest.js
  46. https://www.sigmaaldrich.com/_next/static/ysWkGQG0H5JEVKcBLWLXg/_ssgManifest.js
  47. https://www.sigmaaldrich.com/_next/static/ysWkGQG0H5JEVKcBLWLXg/_middlewareManifest.js
  1. https://www.sigmaaldrich.com/static/fonts/lato.css
  2. https://www.sigmaaldrich.com/static/aem.2a211.css
Image format
The images are served in the AVIF, WebP format.
JavaScript defer
The are 2 javascript resources without the defer attribute.
  1. https://www.sigmaaldrich.com/ruxitagentjs_ICA27Vfhjqrux_10251220909040818.js
  2. https://cdn.cookielaw.org/scripttemplates/otSDKStub.js
DOM size
The DOM size is optimal.
The HTML file has 99 DOM nodes.
Security
HTTPS encryption
The webpage uses HTTPS encryption.
The HTML file has https://www.sigmaaldrich.com/US/en DOM nodes.
Mixed content
There are no mixed content resources on the webpage.
Server signature
The webpage has a public server signature.
openresty
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
There are no structured data tags on the webpage.
Meta viewport
The webpage has a meta viewport tag set.
width=device-width
Character set
The webpage has a charset value set.
utf-8
Sitemap
The website has sitemaps.
  1. https://www.sigmaaldrich.com/sitemap_index.xml
Social
The webpage does not contain any social links.
Content length
The webpage has 14,374 words.
Text to HTML ratio
The text to HTML ratio is 90%.
Inline CSS
The webpage does not contain inline CSS code.
Deprecated HTML
There are no deprecated HTML tags on the webpage.