Tools & Wizards About Us
slippery.nl screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

slippery.nl

Home page | Slippery.nl - Dé online slipperwinkel!

Page Load Speed

6.7 sec in total

First Response

456 ms

Resources Loaded

5.4 sec

Page Rendered

768 ms

slippery.nl screenshot

About Website

Click here to check amazing Slippery content for Netherlands. Otherwise, check out these important facts you probably never knew about slippery.nl

Slippery - Dé online slipperwinkel van Nederland! Met o.a. Reef, Ipanema, Havaianas, Birkenstock, Ilse jacobsen, UGG , Tommy Hilfiger en Olukai

Visit slippery.nl

Key Findings

We analyzed Slippery.nl page load time and found that the first response time was 456 ms and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

slippery.nl performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value92.5 s

0/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value790 ms

37/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value11.8 s

17/100

10%

Network Requests Diagram

slippery.nl

456 ms

slippery.nl

1039 ms

www.slippery.nl

1721 ms

jquery.min.js

35 ms

style.css

92 ms

Our browser made a total of 75 requests to load all elements on the main page. We found that 80% of them (60 requests) were addressed to the original Slippery.nl, 4% (3 requests) were made to Consent.cookiebot.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Slippery.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 11.4 MB (65%)

Content Size

17.6 MB

After Optimization

6.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Slippery.nl main page is 17.6 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. 50% of websites need less resources to load. Images take 17.1 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 57.0 kB

  • Original 72.2 kB
  • After minification 69.2 kB
  • After compression 15.2 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 57.0 kB or 79% of the original size.

Image Optimization

-66%

Potential reduce by 11.2 MB

  • Original 17.1 MB
  • After minification 5.9 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. Obviously, Slippery needs image optimization as it can save up to 11.2 MB or 66% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-43%

Potential reduce by 165.2 kB

  • Original 381.6 kB
  • After minification 380.8 kB
  • After compression 216.3 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 165.2 kB or 43% of the original size.

CSS Optimization

-31%

Potential reduce by 7.3 kB

  • Original 23.4 kB
  • After minification 23.4 kB
  • After compression 16.1 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. Slippery.nl needs all CSS files to be minified and compressed as it can save up to 7.3 kB or 31% of the original size.

Requests Breakdown

Number of requests can be reduced by 43 (63%)

Requests Now

68

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 68 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Slippery. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

slippery.nl

slippery.nl

456 ms

slippery.nl

slippery.nl

1039 ms

www.slippery.nl

www.slippery.nl

1721 ms

jquery.min.js

jquery.min.js

35 ms

style.css

style.css

92 ms

sidebar.css

sidebar.css

183 ms

messages.css

messages.css

271 ms

8d897e4a68931ce77e4e52c55f37c671.css

8d897e4a68931ce77e4e52c55f37c671.css

364 ms

swipebox.min.css

swipebox.min.css

275 ms

prototype.js

prototype.js

457 ms

ccard.js

ccard.js

274 ms

validation.js

validation.js

361 ms

builder.js

builder.js

373 ms

effects.js

effects.js

373 ms

dragdrop.js

dragdrop.js

373 ms

controls.js

controls.js

451 ms

slider.js

slider.js

453 ms

js.js

js.js

455 ms

form.js

form.js

455 ms

menu.js

menu.js

454 ms

translate.js

translate.js

541 ms

cookies.js

cookies.js

543 ms

helper.js

helper.js

543 ms

jquery.swipebox.min.js

jquery.swipebox.min.js

544 ms

jquery.responsiveTabs.min.js

jquery.responsiveTabs.min.js

546 ms

js.cookie.js

js.cookie.js

547 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

631 ms

custom.js

custom.js

632 ms

uc.js

uc.js

45 ms

cd.js

cd.js

126 ms

tp.widget.bootstrap.min.js

tp.widget.bootstrap.min.js

27 ms

analytics.js

analytics.js

73 ms

tp.min.js

tp.min.js

72 ms

check--green.svg

check--green.svg

128 ms

logo.jpg

logo.jpg

127 ms

magnifier.svg

magnifier.svg

128 ms

bekend-van-slam.png

bekend-van-slam.png

126 ms

logo-reef.jpg

logo-reef.jpg

126 ms

logo-havaianas.jpg

logo-havaianas.jpg

126 ms

logo-ipanema.jpg

logo-ipanema.jpg

296 ms

logo-olukai.jpg

logo-olukai.jpg

296 ms

logo-rider.jpg

logo-rider.jpg

296 ms

schermafbeelding_2024-05-10_om_14.21.27.png

schermafbeelding_2024-05-10_om_14.21.27.png

397 ms

schermafbeelding_2024-05-10_om_14.05.33.png

schermafbeelding_2024-05-10_om_14.05.33.png

487 ms

schermafbeelding_2024-05-10_om_13.55.36.png

schermafbeelding_2024-05-10_om_13.55.36.png

574 ms

schermafbeelding_2024-05-10_om_13.39.22.png

schermafbeelding_2024-05-10_om_13.39.22.png

489 ms

ideal-logo.jpg

ideal-logo.jpg

308 ms

paypal-logo.jpg

paypal-logo.jpg

308 ms

visa-logo.jpg

visa-logo.jpg

401 ms

mastercard-logo.jpg

mastercard-logo.jpg

401 ms

mister-cash-logo.jpg

mister-cash-logo.jpg

486 ms

cdreport.js

cdreport.js

146 ms

sooqr.js

sooqr.js

484 ms

bag.svg

bag.svg

471 ms

Beach2.png

Beach2.png

1554 ms

FRFLwTJM.jpeg

FRFLwTJM.jpeg

922 ms

jpg-1597311394-SS21_L__0005_image-_20_.jpg

jpg-1597311394-SS21_L__0005_image-_20_.jpg

758 ms

zAbwoghs.jpeg

zAbwoghs.jpeg

928 ms

ProximaNova-Regular.woff

ProximaNova-Regular.woff

668 ms

ProximaNova-Semibold.woff

ProximaNova-Semibold.woff

644 ms

ProximaNova-Bold.woff

ProximaNova-Bold.woff

737 ms

check-circle--yellow.svg

check-circle--yellow.svg

734 ms

icon-twitter.svg

icon-twitter.svg

803 ms

icon-facebook.svg

icon-facebook.svg

810 ms

icon-google.svg

icon-google.svg

813 ms

clerk.js

clerk.js

533 ms

collect

collect

13 ms

baseline-navigate_before-24px.svg

baseline-navigate_before-24px.svg

819 ms

baseline-navigate_next-24px.svg

baseline-navigate_next-24px.svg

826 ms

slippery.woff

slippery.woff

829 ms

collect

collect

45 ms

js

js

72 ms

ga-audiences

ga-audiences

118 ms

suggest.v4.js

suggest.v4.js

103 ms

load

load

373 ms

Accessibility Review

slippery.nl accessibility score

84

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

Heading elements are not in a sequentially-descending order

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

slippery.nl best practices score

75

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

slippery.nl SEO score

88

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

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Slippery.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Slippery.nl 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

slippery.nl

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