Tools & Wizards About Us
semrock.com screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

semrock.com

Semrock Optical Filters Resources

Page Load Speed

31.5 sec in total

First Response

126 ms

Resources Loaded

12.2 sec

Page Rendered

19.1 sec

semrock.com screenshot

About Website

Welcome to semrock.com homepage info - get ready to check Semrock best content for United States right away, or after learning these important things about semrock.com

Looking for more information about Semrock optical filters? Explore sets by fluorophore, download the Semrock catalog, and more.

Visit semrock.com

Key Findings

We analyzed Semrock.com page load time and found that the first response time was 126 ms and then it took 31.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

semrock.com performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value6.5 s

8/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value1,410 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.048

99/100

15%

TTI (Time to Interactive)

Value20.7 s

2/100

10%

Network Requests Diagram

semrock.com

126 ms

semrock-optical-filters-resources

520 ms

WebResource.axd

92 ms

css

51 ms

ScriptResource.axd

229 ms

Our browser made a total of 74 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Semrock.com, 70% (52 requests) were made to Idex-hs.com and 19% (14 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (520 ms) relates to the external source Idex-hs.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 237.9 kB (13%)

Content Size

1.9 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Semrock.com main page is 1.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 69.8 kB

  • Original 83.6 kB
  • After minification 74.2 kB
  • After compression 13.8 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 9.4 kB, which is 11% 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 69.8 kB or 83% of the original size.

Image Optimization

-2%

Potential reduce by 26.9 kB

  • Original 1.3 MB
  • After minification 1.2 MB

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. Semrock images are well optimized though.

JavaScript Optimization

-21%

Potential reduce by 56.4 kB

  • Original 266.0 kB
  • After minification 265.9 kB
  • After compression 209.6 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 56.4 kB or 21% of the original size.

CSS Optimization

-34%

Potential reduce by 84.8 kB

  • Original 248.5 kB
  • After minification 248.4 kB
  • After compression 163.7 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. Semrock.com needs all CSS files to be minified and compressed as it can save up to 84.8 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (59%)

Requests Now

64

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Semrock. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

semrock.com

semrock.com

126 ms

semrock-optical-filters-resources

semrock-optical-filters-resources

520 ms

WebResource.axd

WebResource.axd

92 ms

css

css

51 ms

ScriptResource.axd

ScriptResource.axd

229 ms

ScriptResource.axd

ScriptResource.axd

149 ms

all.min.css

all.min.css

256 ms

idex-theme.css

idex-theme.css

345 ms

idex-custom-theme.css

idex-custom-theme.css

149 ms

sf.css

sf.css

121 ms

tempusdominus-bootstrap-4.min.css

tempusdominus-bootstrap-4.min.css

47 ms

rzslider.min.css

rzslider.min.css

77 ms

slick.min.css

slick.min.css

76 ms

slick-theme.min.css

slick-theme.min.css

86 ms

idex-static-theme.css

idex-static-theme.css

163 ms

form-loader.js

form-loader.js

37 ms

ws-tracking.js

ws-tracking.js

40 ms

sc-starter.js

sc-starter.js

185 ms

sc-layout.js

sc-layout.js

132 ms

idex-custom.js

idex-custom.js

143 ms

angular.min.js

angular.min.js

43 ms

rzslider.min.js

rzslider.min.js

36 ms

popper.min.js

popper.min.js

48 ms

bootstrap.min.js

bootstrap.min.js

60 ms

underscore-min.js

underscore-min.js

43 ms

moment-with-locales.min.js

moment-with-locales.min.js

59 ms

moment-timezone-with-data-1970-2030.min.js

moment-timezone-with-data-1970-2030.min.js

45 ms

tempusdominus-core.min.js

tempusdominus-core.min.js

42 ms

tempusdominus-bootstrap-4.min.js

tempusdominus-bootstrap-4.min.js

44 ms

slick.min.js

slick.min.js

55 ms

sc-shared.js

sc-shared.js

262 ms

sc-misc.js

sc-misc.js

165 ms

sc-account.js

sc-account.js

194 ms

sc-shopping.js

sc-shopping.js

233 ms

pills.js

pills.js

209 ms

sc-catalog.js

sc-catalog.js

223 ms

sc-external-local-plugins.js

sc-external-local-plugins.js

228 ms

bloodhound.min.js

bloodhound.min.js

55 ms

jquery.scrollTo.min.js

jquery.scrollTo.min.js

55 ms

sc-init.js

sc-init.js

226 ms

WebResource.axd

WebResource.axd

255 ms

gtm.js

gtm.js

219 ms

checkout-logo-large.png

checkout-logo-large.png

202 ms

history-idex-logo.png

history-idex-logo.png

199 ms

sets-by-flourophore.svg

sets-by-flourophore.svg

196 ms

brochures-guides.png

brochures-guides.png

199 ms

searchlight-icon.png

searchlight-icon.png

198 ms

literature-request.png

literature-request.png

199 ms

development.png

development.png

199 ms

semrock.svg

semrock.svg

403 ms

optical-filters-icon.png

optical-filters-icon.png

399 ms

videos.png

videos.png

399 ms

out-of-stock.svg

out-of-stock.svg

401 ms

faqs.png

faqs.png

400 ms

individual-filters-blue.png

individual-filters-blue.png

398 ms

filter-sets-blue.png

filter-sets-blue.png

404 ms

flight-2-nanopede-banner.jpg

flight-2-nanopede-banner.jpg

405 ms

download-our-raman-catalog.jpg

download-our-raman-catalog.jpg

406 ms

filter-set-up-for-quantum-computing.jpg

filter-set-up-for-quantum-computing.jpg

517 ms

transmission-graph-for-spatial-biology-filters.jpg

transmission-graph-for-spatial-biology-filters.jpg

511 ms

searchlight-hp-banner_01.jpg

searchlight-hp-banner_01.jpg

405 ms

group-optical-filters.jpg

group-optical-filters.jpg

516 ms

IHS-Logo.svg

IHS-Logo.svg

406 ms

ISFL-Tagline-Footer.svg

ISFL-Tagline-Footer.svg

511 ms

AvenirLTPro-Roman.woff

AvenirLTPro-Roman.woff

327 ms

fa-solid-900.woff

fa-solid-900.woff

391 ms

fa-regular-400.woff

fa-regular-400.woff

391 ms

fa-light-300.woff

fa-light-300.woff

389 ms

AvenirLTPro-Heavy.woff

AvenirLTPro-Heavy.woff

327 ms

AvenirLTPro-Black.woff

AvenirLTPro-Black.woff

329 ms

AvenirLTPro-Light.woff

AvenirLTPro-Light.woff

327 ms

fa-brands-400.woff

fa-brands-400.woff

390 ms

AccountNavigator-GetStatus

AccountNavigator-GetStatus

201 ms

FloatingShoppingCart-GetStatus

FloatingShoppingCart-GetStatus

193 ms

Accessibility Review

semrock.com accessibility score

88

Accessibility Issues

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

High

Buttons do not have an accessible name

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

semrock.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

semrock.com SEO score

86

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

High

Document uses legible font sizes

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 Semrock.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 Semrock.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

semrock.com

Open Graph data is detected on the main page of Semrock. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: