569 ms in total
81 ms
355 ms
133 ms
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SPEX CertiPrep Organic and Inorganic Certified Reference Materials. Serving the scientific community since 1954. Based in Metuchen, NJ.
Visit spex.comWe analyzed Spex.com page load time and found that the first response time was 81 ms and then it took 488 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.
spex.com performance score
name
value
score
weighting
Value3.9 s
25/100
10%
Value10.2 s
0/100
25%
Value14.1 s
1/100
10%
Value12,200 ms
0/100
30%
Value0.604
10/100
15%
Value22.1 s
1/100
10%
81 ms
42 ms
114 ms
66 ms
141 ms
Our browser made a total of 15 requests to load all elements on the main page. We found that all of those requests were addressed to Spex.com and no external sources were called. The less responsive or slowest element that took the longest time to load (141 ms) belongs to the original domain Spex.com.
Page size can be reduced by 646.4 kB (65%)
992.6 kB
346.2 kB
In fact, the total size of Spex.com main page is 992.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. Images take 869.1 kB which makes up the majority of the site volume.
Potential reduce by 2.8 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. This page needs HTML code to be minified as it can gain 540 B, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 2.8 kB or 66% of the original size.
Potential reduce by 565.4 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. Obviously, SPEX needs image optimization as it can save up to 565.4 kB or 65% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 71.7 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 71.7 kB or 64% of the original size.
Potential reduce by 6.6 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. Spex.com needs all CSS files to be minified and compressed as it can save up to 6.6 kB or 83% of the original size.
We found no issues to fix!
14
14
The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SPEX. According to our analytics all requests are already optimized.
spex.com
81 ms
spexcsp.css
42 ms
jquery-1.8.3.min.js
114 ms
jquery.zoomooz.min.js
66 ms
headerbg.jpg
141 ms
home_logo.png
17 ms
side_image.png
54 ms
certiprep_watermark.png
39 ms
certilogo.png
37 ms
certibottles.png
121 ms
certibutton.png
77 ms
sampleprep_watermark.png
52 ms
samplelogo.png
78 ms
samplemachines.png
87 ms
samplebutton.png
76 ms
spex.com accessibility score
Names and labels
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.
Impact
Issue
Buttons do not have an accessible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
spex.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
spex.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Mobile Friendly
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/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Spex.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Spex.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.
spex.com
Open Graph description is not detected on the main page of SPEX. 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: