Access alfaaesar.com. Login page for Alfa Aesar web pages

name

value

score

weighting

FCP (First Contentful Paint)

Value1.2 s

99/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value1.2 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.2 s

100/100

10%

alfaaesar.com

356 ms

vanilla.css

32 ms

aa288_hires.jpg

48 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 Alfaaesar.com and no external sources were called. The less responsive or slowest element that took the longest time to load (356 ms) belongs to the original domain Alfaaesar.com.

Content Size

13.6 kB

After Optimization

11.9 kB

In fact, the total size of Alfaaesar.com main page is 13.6 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 11.9 kB which makes up the majority of the site volume.

HTML Optimization

-52%

Potential reduce by 618 B

Original 1.2 kB
After minification 1.1 kB
After compression 566 B

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 618 B or 52% of the original size.

Image Optimization

-7%

Potential reduce by 789 B

Original 11.9 kB
After minification 11.2 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. Alfa Aesar images are well optimized though.

CSS Optimization

-56%

Potential reduce by 287 B

Original 513 B
After minification 435 B
After compression 226 B

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. Alfaaesar.com needs all CSS files to be minified and compressed as it can save up to 287 B or 56% of the original size.

Requests Now

After Optimization

The browser has sent 2 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alfa Aesar. According to our analytics all requests are already optimized.

Accessibility Issues

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

High

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

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

Form elements do not have associated labels

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Search Engine Optimization Advices

Language and Encoding

Language Detected

N/A
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alfaaesar.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Alfaaesar.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

alfaaesar.com

Open Graph description is not detected on the main page of Alfa Aesar. 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: