Tools & Wizards About Us
charlestonscientific.com.sg screenshot

Report Summary

  • 28

    Performance

    Renders faster than
    47% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

charlestonscientific.com.sg

Charleston Scientific - Educational Science Supplies & Resources

Page Load Speed

8.1 sec in total

First Response

843 ms

Resources Loaded

6.8 sec

Page Rendered

506 ms

charlestonscientific.com.sg screenshot

About Website

Click here to check amazing Charleston Scientific content. Otherwise, check out these important facts you probably never knew about charlestonscientific.com.sg

Charleston Scientific provides quality science educational laboratory supplies, equipment and services to schools all across Singapore.

Visit charlestonscientific.com.sg

Key Findings

We analyzed Charlestonscientific.com.sg page load time and found that the first response time was 843 ms and then it took 7.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

charlestonscientific.com.sg performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.7 s

2/100

10%

LCP (Largest Contentful Paint)

Value15.6 s

0/100

25%

SI (Speed Index)

Value10.6 s

7/100

10%

TBT (Total Blocking Time)

Value670 ms

45/100

30%

CLS (Cumulative Layout Shift)

Value0.092

92/100

15%

TTI (Time to Interactive)

Value19.5 s

2/100

10%

Network Requests Diagram

charlestonscientific.com.sg

843 ms

font-awesome.min.css

472 ms

shop_lgv.css

481 ms

style.min.css

724 ms

rs6.css

504 ms

Our browser made a total of 137 requests to load all elements on the main page. We found that 77% of them (105 requests) were addressed to the original Charlestonscientific.com.sg, 13% (18 requests) were made to Fonts.gstatic.com and 7% (10 requests) were made to Cdn.datatables.net. The less responsive or slowest element that took the longest time to load (3.7 sec) belongs to the original domain Charlestonscientific.com.sg.

Page Optimization Overview & Recommendations

Page size can be reduced by 221.1 kB (12%)

Content Size

1.9 MB

After Optimization

1.6 MB

  • HTML
  • Images

In fact, the total size of Charlestonscientific.com.sg 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 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 124.3 kB

  • Original 148.1 kB
  • After minification 140.2 kB
  • After compression 23.9 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 124.3 kB or 84% of the original size.

Image Optimization

-6%

Potential reduce by 96.8 kB

  • Original 1.7 MB
  • After minification 1.6 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. Charleston Scientific images are well optimized though.

Requests Breakdown

Number of requests can be reduced by 83 (74%)

Requests Now

112

After Optimization

29

  • Images
  • JavaScript
  • CSS

The browser has sent 112 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Charleston Scientific. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 62 to 1 for JavaScripts and from 23 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

charlestonscientific.com.sg

charlestonscientific.com.sg

843 ms

font-awesome.min.css

font-awesome.min.css

472 ms

shop_lgv.css

shop_lgv.css

481 ms

style.min.css

style.min.css

724 ms

rs6.css

rs6.css

504 ms

tipTip.css

tipTip.css

516 ms

cxecrt-icon-font.css

cxecrt-icon-font.css

519 ms

ec-style.css

ec-style.css

702 ms

woocommerce-quick-order-public.css

woocommerce-quick-order-public.css

719 ms

jquery.dataTables.min.css

jquery.dataTables.min.css

33 ms

responsive.dataTables.min.css

responsive.dataTables.min.css

45 ms

buttons.dataTables.min.css

buttons.dataTables.min.css

52 ms

fixedHeader.dataTables.min.css

fixedHeader.dataTables.min.css

49 ms

js_composer.min.css

js_composer.min.css

975 ms

quick.css

quick.css

758 ms

bootstrap.min.css

bootstrap.min.css

760 ms

style.css

style.css

1627 ms

style.css

style.css

957 ms

v4-shims.min.css

v4-shims.min.css

963 ms

all.min.css

all.min.css

1008 ms

css

css

29 ms

basel-dynamic-1636693981.css

basel-dynamic-1636693981.css

1012 ms

jquery.min.js

jquery.min.js

1435 ms

jquery-migrate.min.js

jquery-migrate.min.js

1204 ms

jquery.cookie.js

jquery.cookie.js

1214 ms

grid_view.js

grid_view.js

1259 ms

rbtools.min.js

rbtools.min.js

1510 ms

rs6.min.js

rs6.min.js

1691 ms

jquery.blockUI.min.js

jquery.blockUI.min.js

1459 ms

add-to-cart.min.js

add-to-cart.min.js

1514 ms

js.cookie.min.js

js.cookie.min.js

1689 ms

woocommerce.min.js

woocommerce.min.js

1711 ms

woocommerce-add-to-cart.js

woocommerce-add-to-cart.js

1772 ms

quick-order.js

quick-order.js

1776 ms

underscore.min.js

underscore.min.js

1857 ms

wp-util.min.js

wp-util.min.js

1914 ms

add-to-cart-variation.min.js

add-to-cart-variation.min.js

2018 ms

wc-blocks.css

wc-blocks.css

1762 ms

animate.min.css

animate.min.css

1790 ms

wp-polyfill.min.js

wp-polyfill.min.js

1790 ms

index.js

index.js

1848 ms

jquery.dataTables.min.js

jquery.dataTables.min.js

22 ms

dataTables.responsive.min.js

dataTables.responsive.min.js

15 ms

dataTables.buttons.min.js

dataTables.buttons.min.js

21 ms

jszip.min.js

jszip.min.js

26 ms

pdfmake.min.js

pdfmake.min.js

45 ms

vfs_fonts.js

vfs_fonts.js

51 ms

buttons.html5.min.js

buttons.html5.min.js

19 ms

buttons.print.min.js

buttons.print.min.js

22 ms

dataTables.fixedHeader.min.js

dataTables.fixedHeader.min.js

25 ms

jquery.tipTip.minified.js

jquery.tipTip.minified.js

1915 ms

email-cart-frontend.js

email-cart-frontend.js

1713 ms

woocommerce-quick-order-public.js

woocommerce-quick-order-public.js

1885 ms

sourcebuster.min.js

sourcebuster.min.js

1862 ms

order-attribution.min.js

order-attribution.min.js

1853 ms

custom.js

custom.js

1851 ms

isotope.pkgd.min.js

isotope.pkgd.min.js

1723 ms

js_composer_front.min.js

js_composer_front.min.js

1711 ms

jquery.magnific-popup.min.js

jquery.magnific-popup.min.js

1750 ms

owl.carousel.min.js

owl.carousel.min.js

1806 ms

photoswipe.min.js

photoswipe.min.js

1808 ms

photoswipe-ui-default.min.js

photoswipe-ui-default.min.js

1605 ms

slick.min.js

slick.min.js

1676 ms

jquery.justifiedGallery.min.js

jquery.justifiedGallery.min.js

1675 ms

imagesloaded.pkgd.min.js

imagesloaded.pkgd.min.js

1715 ms

jquery.pjax.min.js

jquery.pjax.min.js

1780 ms

jquery.countdown.min.js

jquery.countdown.min.js

1624 ms

packery-mode.pkgd.min.js

packery-mode.pkgd.min.js

1621 ms

jquery.autocomplete.min.js

jquery.autocomplete.min.js

1621 ms

threesixty.min.js

threesixty.min.js

1468 ms

TweenMax.min.js

TweenMax.min.js

1526 ms

jquery.nanoscroller.min.js

jquery.nanoscroller.min.js

1515 ms

jquery.panr.min.js

jquery.panr.min.js

1575 ms

jquery.parallax.min.js

jquery.parallax.min.js

1408 ms

vivus.min.js

vivus.min.js

1426 ms

dayjs-index.min.js

dayjs-index.min.js

1451 ms

dayjs.min.js

dayjs.min.js

1532 ms

dayjs-utc.min.js

dayjs-utc.min.js

1484 ms

dayjs-timezone.min.js

dayjs-timezone.min.js

1582 ms

fastclick.min.js

fastclick.min.js

1508 ms

jquery.parallax-scroll.min.js

jquery.parallax-scroll.min.js

1341 ms

device.min.js

device.min.js

1367 ms

pxiGyp8kv8JHgFVrJJLucHtG.woff

pxiGyp8kv8JHgFVrJJLucHtG.woff

94 ms

pxiDyp8kv8JHgFVrJJLmg1hVF9eI.woff

pxiDyp8kv8JHgFVrJJLmg1hVF9eI.woff

126 ms

pxiDyp8kv8JHgFVrJJLm21lVF9eI.woff

pxiDyp8kv8JHgFVrJJLm21lVF9eI.woff

159 ms

pxiDyp8kv8JHgFVrJJLmv1pVF9eI.woff

pxiDyp8kv8JHgFVrJJLmv1pVF9eI.woff

158 ms

pxiAyp8kv8JHgFVrJJLmE0tCMPQ.woff

pxiAyp8kv8JHgFVrJJLmE0tCMPQ.woff

159 ms

pxiDyp8kv8JHgFVrJJLmr19VF9eI.woff

pxiDyp8kv8JHgFVrJJLmr19VF9eI.woff

158 ms

pxiDyp8kv8JHgFVrJJLmy15VF9eI.woff

pxiDyp8kv8JHgFVrJJLmy15VF9eI.woff

332 ms

pxiDyp8kv8JHgFVrJJLm111VF9eI.woff

pxiDyp8kv8JHgFVrJJLm111VF9eI.woff

333 ms

pxiDyp8kv8JHgFVrJJLm81xVF9eI.woff

pxiDyp8kv8JHgFVrJJLm81xVF9eI.woff

336 ms

pxiEyp8kv8JHgFVrJJfedA.woff

pxiEyp8kv8JHgFVrJJfedA.woff

333 ms

pxiByp8kv8JHgFVrLGT9Z1xlEw.woff

pxiByp8kv8JHgFVrLGT9Z1xlEw.woff

332 ms

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

pxiByp8kv8JHgFVrLDz8Z1xlEw.woff

333 ms

pxiByp8kv8JHgFVrLFj_Z1xlEw.woff

pxiByp8kv8JHgFVrLFj_Z1xlEw.woff

334 ms

pxiGyp8kv8JHgFVrLPTucHtG.woff

pxiGyp8kv8JHgFVrLPTucHtG.woff

333 ms

pxiByp8kv8JHgFVrLEj6Z1xlEw.woff

pxiByp8kv8JHgFVrLEj6Z1xlEw.woff

334 ms

pxiByp8kv8JHgFVrLCz7Z1xlEw.woff

pxiByp8kv8JHgFVrLCz7Z1xlEw.woff

333 ms

pxiByp8kv8JHgFVrLDD4Z1xlEw.woff

pxiByp8kv8JHgFVrLDD4Z1xlEw.woff

334 ms

pxiByp8kv8JHgFVrLBT5Z1xlEw.woff

pxiByp8kv8JHgFVrLBT5Z1xlEw.woff

335 ms

waypoints.min.js

waypoints.min.js

1473 ms

functions.js

functions.js

1444 ms

cart-fragments.min.js

cart-fragments.min.js

1518 ms

vc-waypoints.min.js

vc-waypoints.min.js

1494 ms

fa-brands-400.woff

fa-brands-400.woff

1733 ms

Simple-Line-Icons.woff

Simple-Line-Icons.woff

1556 ms

fa-solid-900.woff

fa-solid-900.woff

1374 ms

fa-regular-400.woff

fa-regular-400.woff

1423 ms

basel-font.woff

basel-font.woff

1477 ms

cxecrt-icon-font.woff

cxecrt-icon-font.woff

1471 ms

Group-2.svg

Group-2.svg

1466 ms

Group-38-min.png

Group-38-min.png

1757 ms

CB1001-R.png

CB1001-R.png

3695 ms

B1057813043.jpg

B1057813043.jpg

1527 ms

erlenmeyer-flasks-800x800-1-600x600.jpg

erlenmeyer-flasks-800x800-1-600x600.jpg

1559 ms

1746.jpg

1746.jpg

1553 ms

Biology-1_Poster-Set-Of-Body-Organ-Laminated-uk-600x600.jpg

Biology-1_Poster-Set-Of-Body-Organ-Laminated-uk-600x600.jpg

1743 ms

SAN2095-600x600.jpg

SAN2095-600x600.jpg

1664 ms

Hand_Crank_Generator_ACDC_Generator_Physics_Faraday_Electromagnetic_Teaching_Instruments_-_Enginediy_2_480x480.webp

Hand_Crank_Generator_ACDC_Generator_Physics_Faraday_Electromagnetic_Teaching_Instruments_-_Enginediy_2_480x480.webp

1633 ms

shutterstock_chemicals_antoine2k-600x600.jpg

shutterstock_chemicals_antoine2k-600x600.jpg

1581 ms

KS04_Digital_Scale_LCD_balance_Kitchen_Scale_Electronic_Weighing_Scales_Parcel_Food_Weights_Balance_for_Kitchen_with_Bowl_5000gx1g_158192112827-600x600.jpg

KS04_Digital_Scale_LCD_balance_Kitchen_Scale_Electronic_Weighing_Scales_Parcel_Food_Weights_Balance_for_Kitchen_with_Bowl_5000gx1g_158192112827-600x600.jpg

1606 ms

Physics-2_Bi-Convex-Lens-600x600.jpg

Physics-2_Bi-Convex-Lens-600x600.jpg

1728 ms

Lab-Equipment_Cork-Stopper-No.13-For-Test-Tube-600x600.jpg

Lab-Equipment_Cork-Stopper-No.13-For-Test-Tube-600x600.jpg

1722 ms

Physics-2_Electromagnet-U-Form-26-600x600.jpg

Physics-2_Electromagnet-U-Form-26-600x600.jpg

1722 ms

Lab-Equipment-2_Gloves-Latex-Non-Powdered-600x600.jpg

Lab-Equipment-2_Gloves-Latex-Non-Powdered-600x600.jpg

1616 ms

Charleston-Logo-01-1-600x600.jpg

Charleston-Logo-01-1-600x600.jpg

1641 ms

Lab-Equipment-2_Meter-%E2%80%93-Ammeter-0-3A-%E2%80%98SEW-600x600.jpg

Lab-Equipment-2_Meter-%E2%80%93-Ammeter-0-3A-%E2%80%98SEW-600x600.jpg

1716 ms

Biology_Animal-Cell-Model-on-Stand-600x600.jpg

Biology_Animal-Cell-Model-on-Stand-600x600.jpg

1746 ms

fast.png

fast.png

1756 ms

vendors.jpg

vendors.jpg

1740 ms

GeBIZ-300x300.jpg

GeBIZ-300x300.jpg

1655 ms

good.png

good.png

1788 ms

Findel-International-Education-Resources-300x106.png

Findel-International-Education-Resources-300x106.png

1729 ms

images.png

images.png

1767 ms

MTA-300x150.png

MTA-300x150.png

1769 ms

sanplatec-300x169-1.png

sanplatec-300x169-1.png

1715 ms

Group-24.svg

Group-24.svg

1796 ms

Accessibility Review

charlestonscientific.com.sg accessibility score

79

Accessibility Issues

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

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

charlestonscientific.com.sg 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

charlestonscientific.com.sg SEO score

92

Search Engine Optimization Advices

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

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 Charlestonscientific.com.sg 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 Charlestonscientific.com.sg 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

charlestonscientific.com.sg

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