Tools & Wizards About Us
krass-optik.de screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

krass-optik.de

Brillen, Sonnenbrillen & Kontaktlinsen online kaufen | KRASS Optik

Page Load Speed

8 sec in total

First Response

224 ms

Resources Loaded

6.9 sec

Page Rendered

845 ms

krass-optik.de screenshot

About Website

Welcome to krass-optik.de homepage info - get ready to check KRASS Optik best content right away, or after learning these important things about krass-optik.de

Modische Brillen, coole Sonnenbrillen und Kontaktlinsen online in Sehstärke bestellen ✔ Brillen und Sonnenbrillen online anprobieren ✔ Erstklassiger Service in über 80 Filialen ✔

Visit krass-optik.de

Key Findings

We analyzed Krass-optik.de page load time and found that the first response time was 224 ms and then it took 7.8 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

krass-optik.de performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

66/100

10%

LCP (Largest Contentful Paint)

Value27.1 s

0/100

25%

SI (Speed Index)

Value14.0 s

1/100

10%

TBT (Total Blocking Time)

Value1,050 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.059

98/100

15%

TTI (Time to Interactive)

Value32.2 s

0/100

10%

Network Requests Diagram

krass-optik.de

224 ms

www.krass-optik.com

504 ms

calendar.min.css

90 ms

styles.min.css

271 ms

leaflet.min.css

264 ms

Our browser made a total of 141 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Krass-optik.de, 96% (136 requests) were made to Krass-optik.com and 1% (1 request) were made to App.usercentrics.eu. The less responsive or slowest element that took the longest time to load (5.4 sec) relates to the external source Krass-optik.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 972.1 kB (14%)

Content Size

6.8 MB

After Optimization

5.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Krass-optik.de main page is 6.8 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. 45% of websites need less resources to load. Images take 6.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 141.7 kB

  • Original 176.3 kB
  • After minification 162.4 kB
  • After compression 34.6 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 141.7 kB or 80% of the original size.

Image Optimization

-13%

Potential reduce by 823.8 kB

  • Original 6.1 MB
  • After minification 5.3 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, KRASS Optik needs image optimization as it can save up to 823.8 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 6.5 kB

  • Original 451.0 kB
  • After minification 451.0 kB
  • After compression 444.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 99 B

  • Original 58.4 kB
  • After minification 58.4 kB
  • After compression 58.3 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. Krass-optik.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 121 (89%)

Requests Now

136

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 136 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KRASS Optik. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 118 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

krass-optik.de

krass-optik.de

224 ms

www.krass-optik.com

www.krass-optik.com

504 ms

calendar.min.css

calendar.min.css

90 ms

styles.min.css

styles.min.css

271 ms

leaflet.min.css

leaflet.min.css

264 ms

MarkerCluster.min.css

MarkerCluster.min.css

269 ms

MarkerCluster.Default.min.css

MarkerCluster.Default.min.css

288 ms

require.min.js

require.min.js

282 ms

requirejs-min-resolver.min.js

requirejs-min-resolver.min.js

281 ms

mixins.min.js

mixins.min.js

345 ms

requirejs-config.min.js

requirejs-config.min.js

352 ms

head.min.js

head.min.js

359 ms

tracking.min.js

tracking.min.js

357 ms

promise.min.js

promise.min.js

398 ms

bundle.js

bundle.js

34 ms

emarsys-m2-email-after-233.js

emarsys-m2-email-after-233.js

29 ms

1x1.gif

1x1.gif

399 ms

Newsletter_Popup_spring2024_1080x1080.png

Newsletter_Popup_spring2024_1080x1080.png

1306 ms

Newsletter_Popup_spring2024_1600x900.png

Newsletter_Popup_spring2024_1600x900.png

1250 ms

Lato-Regular.woff

Lato-Regular.woff

538 ms

Lato-Bold.woff

Lato-Bold.woff

552 ms

icomoon.ttf

icomoon.ttf

201 ms

jquery.min.js

jquery.min.js

183 ms

matches.min.js

matches.min.js

258 ms

closest.min.js

closest.min.js

258 ms

picturefill.min.js

picturefill.min.js

348 ms

entries.min.js

entries.min.js

348 ms

Category_transp_spring24_600x600.jpg

Category_transp_spring24_600x600.jpg

775 ms

common.min.js

common.min.js

417 ms

dataPost.min.js

dataPost.min.js

528 ms

bootstrap.min.js

bootstrap.min.js

570 ms

form-key-provider.min.js

form-key-provider.min.js

582 ms

mage-translation-dictionary.min.js

mage-translation-dictionary.min.js

595 ms

scarab-v2.js

scarab-v2.js

87 ms

customer-data.min.js

customer-data.min.js

648 ms

body.min.js

body.min.js

661 ms

jquery-mixin.min.js

jquery-mixin.min.js

673 ms

jquery-migrate.min.js

jquery-migrate.min.js

589 ms

Category_pastel_maerz22_600x600.jpg

Category_pastel_maerz22_600x600.jpg

1118 ms

Home_hero_spring24_2400x960.png

Home_hero_spring24_2400x960.png

5433 ms

domReady.min.js

domReady.min.js

417 ms

template.min.js

template.min.js

337 ms

confirm.min.js

confirm.min.js

393 ms

widget.min.js

widget.min.js

415 ms

main.min.js

main.min.js

384 ms

bootstrap.min.js

bootstrap.min.js

427 ms

text.min.js

text.min.js

411 ms

underscore.min.js

underscore.min.js

375 ms

knockout.min.js

knockout.min.js

386 ms

section-config.min.js

section-config.min.js

427 ms

url.min.js

url.min.js

437 ms

storage.min.js

storage.min.js

464 ms

jquery.storageapi.extended.min.js

jquery.storageapi.extended.min.js

474 ms

enquire.min.js

enquire.min.js

498 ms

noframework.waypoints.min.js

noframework.waypoints.min.js

508 ms

wrapper.min.js

wrapper.min.js

526 ms

translate.min.js

translate.min.js

315 ms

modal.min.js

modal.min.js

339 ms

version.min.js

version.min.js

324 ms

scripts.min.js

scripts.min.js

345 ms

knockout-es5.min.js

knockout-es5.min.js

316 ms

engine.min.js

engine.min.js

352 ms

bootstrap.min.js

bootstrap.min.js

357 ms

observable_array.min.js

observable_array.min.js

387 ms

bound-nodes.min.js

bound-nodes.min.js

386 ms

js-translation.json

js-translation.json

396 ms

jquery.cookie.min.js

jquery.cookie.min.js

301 ms

jquery.storageapi.min.js

jquery.storageapi.min.js

312 ms

mage.min.js

mage.min.js

236 ms

modal-popup.html

modal-popup.html

217 ms

modal-slide.html

modal-slide.html

234 ms

modal-custom.html

modal-custom.html

262 ms

key-codes.min.js

key-codes.min.js

271 ms

core.min.js

core.min.js

298 ms

z-index.min.js

z-index.min.js

311 ms

observable_source.min.js

observable_source.min.js

224 ms

renderer.min.js

renderer.min.js

248 ms

console-logger.min.js

console-logger.min.js

256 ms

knockout-repeat.min.js

knockout-repeat.min.js

274 ms

knockout-fast-foreach.min.js

knockout-fast-foreach.min.js

280 ms

resizable.min.js

resizable.min.js

292 ms

i18n.min.js

i18n.min.js

316 ms

scope.min.js

scope.min.js

326 ms

range.min.js

range.min.js

356 ms

mage-init.min.js

mage-init.min.js

363 ms

keyboard.min.js

keyboard.min.js

380 ms

optgroup.min.js

optgroup.min.js

402 ms

after-render.min.js

after-render.min.js

412 ms

autoselect.min.js

autoselect.min.js

444 ms

datepicker.min.js

datepicker.min.js

450 ms

outer_click.min.js

outer_click.min.js

468 ms

fadeVisible.min.js

fadeVisible.min.js

487 ms

collapsible.min.js

collapsible.min.js

497 ms

staticChecked.min.js

staticChecked.min.js

540 ms

simple-checked.min.js

simple-checked.min.js

541 ms

bind-html.min.js

bind-html.min.js

555 ms

tooltip.min.js

tooltip.min.js

572 ms

color-picker.min.js

color-picker.min.js

579 ms

events.min.js

events.min.js

624 ms

load

load

618 ms

data.min.js

data.min.js

467 ms

disable-selection.min.js

disable-selection.min.js

481 ms

focusable.min.js

focusable.min.js

490 ms

form.min.js

form.min.js

538 ms

ie.min.js

ie.min.js

554 ms

keycode.min.js

keycode.min.js

567 ms

labels.min.js

labels.min.js

576 ms

jquery-patch.min.js

jquery-patch.min.js

589 ms

plugin.min.js

plugin.min.js

625 ms

safe-active-element.min.js

safe-active-element.min.js

639 ms

safe-blur.min.js

safe-blur.min.js

640 ms

scroll-parent.min.js

scroll-parent.min.js

622 ms

tabbable.min.js

tabbable.min.js

628 ms

unique-id.min.js

unique-id.min.js

634 ms

class.min.js

class.min.js

644 ms

loader.min.js

loader.min.js

637 ms

local.min.js

local.min.js

622 ms

logger.min.js

logger.min.js

630 ms

entry-factory.min.js

entry-factory.min.js

634 ms

console-output-handler.min.js

console-output-handler.min.js

646 ms

formatter.min.js

formatter.min.js

636 ms

message-pool.min.js

message-pool.min.js

623 ms

levels-pool.min.js

levels-pool.min.js

631 ms

logger-utils.min.js

logger-utils.min.js

635 ms

async.min.js

async.min.js

646 ms

registry.min.js

registry.min.js

635 ms

main.min.js

main.min.js

623 ms

tooltip.html

tooltip.html

553 ms

spectrum.min.js

spectrum.min.js

581 ms

tinycolor.min.js

tinycolor.min.js

600 ms

263 ms

entry.min.js

entry.min.js

196 ms

moment.min.js

moment.min.js

185 ms

template.min.js

template.min.js

206 ms

dom-observer.min.js

dom-observer.min.js

156 ms

bindings.min.js

bindings.min.js

175 ms

arrays.min.js

arrays.min.js

161 ms

compare.min.js

compare.min.js

170 ms

misc.min.js

misc.min.js

192 ms

objects.min.js

objects.min.js

229 ms

strings.min.js

strings.min.js

244 ms

Accessibility Review

krass-optik.de accessibility score

77

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

krass-optik.de best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

krass-optik.de SEO score

92

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

Image elements do not have [alt] attributes

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

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

krass-optik.de

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