Access selleckchem.com. Selleckchem.com - Bioactive Compounds Expert (Bioactive Compounds,Compound Libraries)

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value5.8 s

50/100

10%

TBT (Total Blocking Time)

Value1,070 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.035

100/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

selleckchem.com

42 ms

selleckchem.com

43 ms

v1

93 ms

Our browser made a total of 3 requests to load all elements on the main page. We found that all of those requests were addressed to Selleckchem.com and no external sources were called. The less responsive or slowest element that took the longest time to load (93 ms) belongs to the original domain Selleckchem.com.

Content Size

581.8 kB

After Optimization

401.0 kB

In fact, the total size of Selleckchem.com main page is 581.8 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. Images take 298.0 kB which makes up the majority of the site volume.

HTML Optimization

-57%

Potential reduce by 8.7 kB

Original 15.2 kB
After minification 15.2 kB
After compression 6.5 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 8.7 kB or 57% of the original size.

Image Optimization

-2%

Potential reduce by 7.1 kB

Original 298.0 kB
After minification 290.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Selleckchem images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 137.4 kB

Original 232.3 kB
After minification 223.6 kB
After compression 95.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 137.4 kB or 59% of the original size.

CSS Optimization

-76%

Potential reduce by 27.6 kB

Original 36.3 kB
After minification 35.5 kB
After compression 8.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Selleckchem.com needs all CSS files to be minified and compressed as it can save up to 27.6 kB or 76% of the original size.

Requests Now

After Optimization

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Selleckchem. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Selleckchem.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Selleckchem.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Selleckchem. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: