Tools & Wizards About Us
zenni.com screenshot

Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

zenni.com

Glasses Online Plus Contacts | Eyewear for Everyone™ | Zenni Optical

Page Load Speed

3.5 sec in total

First Response

79 ms

Resources Loaded

976 ms

Page Rendered

2.4 sec

zenni.com screenshot

About Website

Click here to check amazing Zenni content for United States. Otherwise, check out these important facts you probably never knew about zenni.com

Find affordable glasses, sunglasses, and contacts at Zenni. Shop our range of prescription and non-RX frames, from classic to trendy styles, starting at $6.95!

Visit zenni.com

Key Findings

We analyzed Zenni.com page load time and found that the first response time was 79 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

zenni.com performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value9.6 s

0/100

25%

SI (Speed Index)

Value18.7 s

0/100

10%

TBT (Total Blocking Time)

Value13,280 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.537

14/100

15%

TTI (Time to Interactive)

Value43.2 s

0/100

10%

Network Requests Diagram

www.zennioptical.com

79 ms

styles.d512d1e360b0f49a922d.css

211 ms

cookiestorestart

50 ms

afxRECzCqyTBLA.js

52 ms

12126410469.js

83 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Zenni.com, 8% (6 requests) were made to Zennioptical.com and 5% (4 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (481 ms) relates to the external source Static.zennioptical.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.4 MB (18%)

Content Size

7.8 MB

After Optimization

6.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zenni.com main page is 7.8 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. Only a small number of websites need less resources to load. Images take 5.6 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 149.7 kB

  • Original 178.3 kB
  • After minification 177.3 kB
  • After compression 28.6 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 149.7 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 72.6 kB

  • Original 5.6 MB
  • After minification 5.5 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. Zenni images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 1.2 MB

  • Original 1.9 MB
  • After minification 1.9 MB
  • After compression 683.1 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 1.2 MB or 63% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 145.7 kB
  • After minification 145.7 kB
  • After compression 145.7 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. Zenni.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 14 (21%)

Requests Now

67

After Optimization

53

  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zenni. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.zennioptical.com

www.zennioptical.com

79 ms

styles.d512d1e360b0f49a922d.css

styles.d512d1e360b0f49a922d.css

211 ms

cookiestorestart

cookiestorestart

50 ms

afxRECzCqyTBLA.js

afxRECzCqyTBLA.js

52 ms

12126410469.js

12126410469.js

83 ms

magic_ai.js

magic_ai.js

120 ms

jquery.min.js

jquery.min.js

89 ms

appleid.auth.js

appleid.auth.js

50 ms

client

client

75 ms

fwn.js

fwn.js

60 ms

enterprise.js

enterprise.js

63 ms

webpack-runtime-ec390dc88f1fa01efd2e.js

webpack-runtime-ec390dc88f1fa01efd2e.js

171 ms

framework-8dc6b1b289bc67508525.js

framework-8dc6b1b289bc67508525.js

120 ms

app-82ef16f0fe7d1847f2b0.js

app-82ef16f0fe7d1847f2b0.js

187 ms

xS1A

xS1A

48 ms

api.js

api.js

4 ms

css2

css2

48 ms

css2

css2

66 ms

gtm.js

gtm.js

360 ms

loading-01.gif

loading-01.gif

319 ms

zenni-logo.png

zenni-logo.png

276 ms

zenni-logo-sm.png

zenni-logo-sm.png

367 ms

storeSiteUS_flag.jpg

storeSiteUS_flag.jpg

307 ms

240627_july_4th_HP_1Tile_END_DATE-xs.png

240627_july_4th_HP_1Tile_END_DATE-xs.png

280 ms

240403_Contacts_SubNav_Update.jpg

240403_Contacts_SubNav_Update.jpg

278 ms

2-daydelivery.jpg

2-daydelivery.jpg

275 ms

eyeglasses.jpg

eyeglasses.jpg

367 ms

sunglasses.jpg

sunglasses.jpg

368 ms

240620_BrandedFrames_campaign_navtype.jpg

240620_BrandedFrames_campaign_navtype.jpg

366 ms

transitions.jpg

transitions.jpg

366 ms

bluelight.jpg

bluelight.jpg

367 ms

progressives.jpg

progressives.jpg

369 ms

readers.jpg

readers.jpg

371 ms

bifocals.jpg

bifocals.jpg

369 ms

fl41_womenstlc_nav.png

fl41_womenstlc_nav.png

372 ms

gaming_category_nav_site.jpg

gaming_category_nav_site.jpg

369 ms

eyeq_new_color_onfig_hp_carousel-xs.png

eyeq_new_color_onfig_hp_carousel-xs.png

425 ms

USAV_HP_carousel-xs.png

USAV_HP_carousel-xs.png

372 ms

240620_BrandedFrames_campaign_hp_carousel-xs.gif

240620_BrandedFrames_campaign_hp_carousel-xs.gif

371 ms

240515_Transitions_Gen_S_hp_carousel_card-lg.jpg

240515_Transitions_Gen_S_hp_carousel_card-lg.jpg

371 ms

062624_gaming_hp_carousel_on_fig_m-xs.png

062624_gaming_hp_carousel_on_fig_m-xs.png

374 ms

Trust-Stars-Black.svg

Trust-Stars-Black.svg

421 ms

240618_sun_squad_hp_3Tile_xs.png

240618_sun_squad_hp_3Tile_xs.png

426 ms

240620_PolarizedSun_site_campaign_hp_3Tile-xs.png

240620_PolarizedSun_site_campaign_hp_3Tile-xs.png

423 ms

240315_Sunglasses_Push_campaign_hp_3Tile_laydowns-xs.png

240315_Sunglasses_Push_campaign_hp_3Tile_laydowns-xs.png

481 ms

Chevron-right-regular.svg

Chevron-right-regular.svg

425 ms

240529_contacts_1Tile_v2-xs.png

240529_contacts_1Tile_v2-xs.png

426 ms

051024_kpop_hp_carousel_group-xs.png

051024_kpop_hp_carousel_group-xs.png

427 ms

western_hp_carousel-xs.png

western_hp_carousel-xs.png

428 ms

240506_BoldAcetate_hp_carousel-xs.png

240506_BoldAcetate_hp_carousel-xs.png

429 ms

240509_hp_carousel_cottage_core-xs.png

240509_hp_carousel_cottage_core-xs.png

428 ms

240315_Site_HP_retro_campaign_hp_carousel-xs.png

240315_Site_HP_retro_campaign_hp_carousel-xs.png

428 ms

240617_hp_carousel_zodiac_cancer-xs.jpg

240617_hp_carousel_zodiac_cancer-xs.jpg

429 ms

Monthly_Deals_hp_2tile-xs.png

Monthly_Deals_hp_2tile-xs.png

430 ms

240624_OTC_Readers_July_Push_campaign_hp_2Tile-xs.gif

240624_OTC_Readers_July_Push_campaign_hp_2Tile-xs.gif

469 ms

S6uyw4BMUTPHvxo.woff

S6uyw4BMUTPHvxo.woff

58 ms

S6u9w4BMUTPHh7USeww.woff

S6u9w4BMUTPHh7USeww.woff

80 ms

S6u9w4BMUTPHh6UVeww.woff

S6u9w4BMUTPHh6UVeww.woff

141 ms

S6u9w4BMUTPHh50Xeww.woff

S6u9w4BMUTPHh50Xeww.woff

142 ms

suitcase_type_foundry_-_tabacg1-bold-webfont.woff

suitcase_type_foundry_-_tabacg1-bold-webfont.woff

173 ms

240509_hp_3Tile_featured_styles_face_shape-xs.png

240509_hp_3Tile_featured_styles_face_shape-xs.png

198 ms

240509_hp_3Tile_featured_styles_frame_shape-xs.png

240509_hp_3Tile_featured_styles_frame_shape-xs.png

198 ms

ShopbyColor_hp_3Tile-xs.png

ShopbyColor_hp_3Tile-xs.png

195 ms

ChaseCollection_HP_4Tile-xs.png

ChaseCollection_HP_4Tile-xs.png

197 ms

230915_Keke_Palmer_NG_tlc_4Tile-xs.png

230915_Keke_Palmer_NG_tlc_4Tile-xs.png

169 ms

240301_Iris_Forever_tlc_4Tile-xs.png

240301_Iris_Forever_tlc_4Tile-xs.png

110 ms

Kittles_4Tile-xs.png

Kittles_4Tile-xs.png

116 ms

240509_hp_1Tile_zenni_rewards-xs.jpg

240509_hp_1Tile_zenni_rewards-xs.jpg

113 ms

ZEN_Sym_teal.png

ZEN_Sym_teal.png

111 ms

download-on-the-app-store.svg

download-on-the-app-store.svg

110 ms

get_it_on_google_play.png

get_it_on_google_play.png

112 ms

logo-footer.png

logo-footer.png

111 ms

COLTS_FDAConformanceSealGS.jpg

COLTS_FDAConformanceSealGS.jpg

111 ms

Accessibility Review

zenni.com accessibility score

82

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

button, link, and menuitem elements do not have accessible names.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

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

Image elements do not have [alt] attributes

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

zenni.com best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

zenni.com SEO score

85

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

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

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 Zenni.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 Zenni.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

zenni.com

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