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dev.jbl.com screenshot

Report Summary

  • 1

    Performance

    Renders faster than
    19% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 70

    SEO

    Google-friendlier than
    30% of websites

dev.jbl.com

Official JBL Store - Speakers, Headphones, and More! 14.5.0.8

Page Load Speed

8.4 sec in total

First Response

2.8 sec

Resources Loaded

5 sec

Page Rendered

651 ms

dev.jbl.com screenshot

About Website

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

Premium speakers from JBL such as wireless bluetooth speakers, Android & iOS headphones, soundbars, subwoofers, home theater systems, computer speakers, & iPod/iPhone docks. Get the best sound for mus...

Visit dev.jbl.com

Key Findings

We analyzed Dev.jbl.com page load time and found that the first response time was 2.8 sec and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

dev.jbl.com performance score

1

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.2 s

3/100

10%

LCP (Largest Contentful Paint)

Value11.9 s

0/100

25%

SI (Speed Index)

Value60.5 s

0/100

10%

TBT (Total Blocking Time)

Value75,810 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.778

5/100

15%

TTI (Time to Interactive)

Value94.7 s

0/100

10%

Network Requests Diagram

dev.jbl.com

2815 ms

style.min.css

140 ms

compare-plp.min.css

64 ms

eol-pdp.min.css

71 ms

pdp-v2.min.css

89 ms

Our browser made a total of 194 requests to load all elements on the main page. We found that 92% of them (178 requests) were addressed to the original Dev.jbl.com, 1% (2 requests) were made to Se.monetate.net and 1% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain Dev.jbl.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 616.1 kB (28%)

Content Size

2.2 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dev.jbl.com main page is 2.2 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 805.9 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 520.9 kB

  • Original 571.0 kB
  • After minification 445.5 kB
  • After compression 50.1 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 125.5 kB, which is 22% 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 520.9 kB or 91% of the original size.

Image Optimization

-2%

Potential reduce by 17.9 kB

  • Original 805.9 kB
  • After minification 788.0 kB

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. Dev JBL images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 75.9 kB

  • Original 653.6 kB
  • After minification 648.5 kB
  • After compression 577.8 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 75.9 kB or 12% of the original size.

CSS Optimization

-1%

Potential reduce by 1.4 kB

  • Original 136.0 kB
  • After minification 135.9 kB
  • After compression 134.6 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. Dev.jbl.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 146 (80%)

Requests Now

182

After Optimization

36

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 182 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dev JBL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 106 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dev.jbl.com

dev.jbl.com

2815 ms

style.min.css

style.min.css

140 ms

compare-plp.min.css

compare-plp.min.css

64 ms

eol-pdp.min.css

eol-pdp.min.css

71 ms

pdp-v2.min.css

pdp-v2.min.css

89 ms

jquery-2.0.3.min.js

jquery-2.0.3.min.js

71 ms

modernizr.js

modernizr.js

69 ms

underscore-1.5.2.min.js

underscore-1.5.2.min.js

128 ms

lazysizes.js

lazysizes.js

96 ms

extend.css

extend.css

129 ms

responsive.css

responsive.css

129 ms

collect.js

collect.js

45 ms

entry.js

entry.js

84 ms

dwux-sf-15.5.css

dwux-sf-15.5.css

133 ms

dwux-init.js

dwux-init.js

130 ms

bv.js

bv.js

107 ms

sha256.min.js

sha256.min.js

257 ms

jquery.visible.min.js

jquery.visible.min.js

258 ms

bootstrap.js

bootstrap.js

257 ms

bootstrap-dialog.js

bootstrap-dialog.js

258 ms

parsley-1.2.0-edit.js

parsley-1.2.0-edit.js

259 ms

console.log.polyfill.js

console.log.polyfill.js

259 ms

matchMedia.js

matchMedia.js

259 ms

matchMedia.addListener.js

matchMedia.addListener.js

279 ms

enquire.min.js

enquire.min.js

279 ms

jquery.customSelect.min.js

jquery.customSelect.min.js

279 ms

slick.js

slick.js

279 ms

jquery.ba-hashchange.js

jquery.ba-hashchange.js

278 ms

jquery.touchSwipe.min.js

jquery.touchSwipe.min.js

278 ms

jquery.jqzoom.dw.js

jquery.jqzoom.dw.js

340 ms

jquery.cookiebar.js

jquery.cookiebar.js

339 ms

ios-orientationchange-fix.js

ios-orientationchange-fix.js

339 ms

global.js

global.js

377 ms

ready.js

ready.js

339 ms

load.js

load.js

338 ms

en_US.js

en_US.js

377 ms

000_head.js

000_head.js

380 ms

100_fitguide.js

100_fitguide.js

378 ms

101_storelocatorUtil.js

101_storelocatorUtil.js

377 ms

js

js

59 ms

gretel.min.js

gretel.min.js

28 ms

001_namespace.js

001_namespace.js

376 ms

002_storefront.js

002_storefront.js

393 ms

003_tooltip.js

003_tooltip.js

385 ms

004_product.js

004_product.js

386 ms

005_producttile.js

005_producttile.js

325 ms

006_productcompare.js

006_productcompare.js

362 ms

007_compare.js

007_compare.js

360 ms

008_sendtofriend.js

008_sendtofriend.js

329 ms

009_search.js

009_search.js

329 ms

010_bonusproductsview.js

010_bonusproductsview.js

327 ms

011_giftcert.js

011_giftcert.js

326 ms

012_giftcard.js

012_giftcard.js

325 ms

gtm.js

gtm.js

211 ms

j.php

j.php

211 ms

custom.js

custom.js

155 ms

track_cart

track_cart

132 ms

__SYSTEM__StorefrontToolkit-Start

__SYSTEM__StorefrontToolkit-Start

290 ms

013_checkout.js

013_checkout.js

259 ms

014_quickview.js

014_quickview.js

258 ms

015_util.js

015_util.js

260 ms

016_page.js

016_page.js

258 ms

017_registry.js

017_registry.js

258 ms

018_progress.js

018_progress.js

285 ms

019_components.js

019_components.js

285 ms

020_cart.js

020_cart.js

266 ms

021_account.js

021_account.js

266 ms

022_wishlist.js

022_wishlist.js

266 ms

023_minicart.js

023_minicart.js

266 ms

024_dialog.js

024_dialog.js

312 ms

025_validator.js

025_validator.js

277 ms

026_ajax.js

026_ajax.js

218 ms

027_searchsuggest.js

027_searchsuggest.js

217 ms

029_searchplaceholder.js

029_searchplaceholder.js

217 ms

030_jsextensions.js

030_jsextensions.js

241 ms

031_picturefill.js

031_picturefill.js

246 ms

033_navigation.js

033_navigation.js

222 ms

034_vip.js

034_vip.js

212 ms

035_productsupport.js

035_productsupport.js

234 ms

036_storelocator.js

036_storelocator.js

224 ms

037_sap.js

037_sap.js

253 ms

038_cookieprivacy.js

038_cookieprivacy.js

227 ms

099_styleguide.js

099_styleguide.js

259 ms

v.gif

v.gif

73 ms

tealium.js

tealium.js

203 ms

support.js

support.js

212 ms

XXX_footer.js

XXX_footer.js

209 ms

102_shipestimate.js

102_shipestimate.js

203 ms

103_faqupdate.js

103_faqupdate.js

221 ms

104_createaccount.js

104_createaccount.js

246 ms

0040_productspecpdf.js

0040_productspecpdf.js

245 ms

headroom.js

headroom.js

254 ms

header-navigation.js

header-navigation.js

258 ms

gtmcode.js

gtmcode.js

191 ms

105_gsearchsuggestion.js

105_gsearchsuggestion.js

197 ms

108_samsungpay_minicart.js

108_samsungpay_minicart.js

212 ms

productregistration_au.js

productregistration_au.js

213 ms

compare_v2.js

compare_v2.js

227 ms

gtm.js

gtm.js

39 ms

mc_conversion_trackingpixel.js

mc_conversion_trackingpixel.js

218 ms

ext-all.css

ext-all.css

197 ms

dwux-15.2.css

dwux-15.2.css

225 ms

jspdf.debug.js

jspdf.debug.js

224 ms

videoLightning.js

videoLightning.js

224 ms

vertebraeAr.js

vertebraeAr.js

231 ms

eol.min.js

eol.min.js

234 ms

debug.js

debug.js

233 ms

plyr.js

plyr.js

243 ms

dwanalytics-22.2.js

dwanalytics-22.2.js

251 ms

dwac-21.7.js

dwac-21.7.js

250 ms

applepay.js

applepay.js

281 ms

HelveticaNeueLTW02-55Roman.woff

HelveticaNeueLTW02-55Roman.woff

243 ms

HelveticaNeueLTW02-45Light.woff

HelveticaNeueLTW02-45Light.woff

248 ms

vk.woff

vk.woff

248 ms

jbl-font.woff

jbl-font.woff

265 ms

HelveticaNeueLTW02-75Bold.woff

HelveticaNeueLTW02-75Bold.woff

265 ms

ITCAvantGardeGothicW02-Bold.woff

ITCAvantGardeGothicW02-Bold.woff

279 ms

snapchat-ghost.woff

snapchat-ghost.woff

256 ms

ext-base.js

ext-base.js

252 ms

issueCollectorBootstrap.js

issueCollectorBootstrap.js

282 ms

ext-all.js

ext-all.js

313 ms

ext-overrides.js

ext-overrides.js

355 ms

dwux-15.9.js

dwux-15.9.js

304 ms

us.png

us.png

301 ms

jbllogo.svg

jbllogo.svg

320 ms

JBL_Personalization_TopNav_284x284.jpg

JBL_Personalization_TopNav_284x284.jpg

341 ms

JBL_3Series_Promo_March2022_284x284_ShopNow.jpg

JBL_3Series_Promo_March2022_284x284_ShopNow.jpg

336 ms

JBL_Quantum_Home_2800x970.jpg

JBL_Quantum_Home_2800x970.jpg

309 ms

JBL_Quantum_Mobile_1398x1398.jpg

JBL_Quantum_Mobile_1398x1398.jpg

309 ms

JBL_Boombox2_Home_2800x970.jpg

JBL_Boombox2_Home_2800x970.jpg

301 ms

JBL_Boombox2_Mobile_1398x1398.jpg

JBL_Boombox2_Mobile_1398x1398.jpg

298 ms

1_JBL_FLIP6_HERO_BLUE_29399_x1.jpg

1_JBL_FLIP6_HERO_BLUE_29399_x1.jpg

299 ms

swatchImage_Flip_6_Teal.png

swatchImage_Flip_6_Teal.png

324 ms

ei1u6gh3zri1xy2dnicq.jpg

ei1u6gh3zri1xy2dnicq.jpg

278 ms

swatchImage_Flip_6_Red.png

swatchImage_Flip_6_Red.png

277 ms

hlrwew97gkqiwaiuiar6.jpg

hlrwew97gkqiwaiuiar6.jpg

264 ms

swatchImage_Flip_6_Blue.png

swatchImage_Flip_6_Blue.png

293 ms

JBL_TUNE%20225TWS%20Ghost_Product%20Image_Hero_Black.jpg

JBL_TUNE%20225TWS%20Ghost_Product%20Image_Hero_Black.jpg

259 ms

daur1y3v3zecpautw4j2.jpg

daur1y3v3zecpautw4j2.jpg

268 ms

studio590blk_001_v2_dvHAMaster.jpg

studio590blk_001_v2_dvHAMaster.jpg

268 ms

blackpdp_dvHA.png

blackpdp_dvHA.png

267 ms

JBL_LIVE_PRO+_TWS_Product%20Image_Case%20Open%202_White.jpg

JBL_LIVE_PRO+_TWS_Product%20Image_Case%20Open%202_White.jpg

263 ms

swatchImage_Beige_01.png

swatchImage_Beige_01.png

281 ms

nlwe1ifpisqotktew5wv.jpg

nlwe1ifpisqotktew5wv.jpg

253 ms

swatchImages_Pink_Clip_4.png

swatchImages_Pink_Clip_4.png

260 ms

JBL_Endurance_Peak_Charger_Open_Black_1605x1605.jpg

JBL_Endurance_Peak_Charger_Open_Black_1605x1605.jpg

478 ms

black-square-pdp.png

black-square-pdp.png

252 ms

JBL_Charge4_Front_GrayCamo-1605x1605px.jpg

JBL_Charge4_Front_GrayCamo-1605x1605px.jpg

446 ms

DustyPink-Squarepdp.png

DustyPink-Squarepdp.png

446 ms

DesertSand-Squarepdp.png

DesertSand-Squarepdp.png

449 ms

ForestGreen-Squarepdp.png

ForestGreen-Squarepdp.png

421 ms

Camo-pdp-square.png

Camo-pdp-square.png

421 ms

Squad-square.png

Squad-square.png

423 ms

Teal-Squarepdp.png

Teal-Squarepdp.png

419 ms

JBL_CLUB_700BT_Product%20Photo_HERO.jpg

JBL_CLUB_700BT_Product%20Photo_HERO.jpg

405 ms

swatchImage_Black.png

swatchImage_Black.png

379 ms

JBL_TUNE%20215TWS_Product%20Image_White_Hero.jpg

JBL_TUNE%20215TWS_Product%20Image_White_Hero.jpg

345 ms

JBL_Quantum%20800_Product%20Image_ANGLE_White.jpg

JBL_Quantum%20800_Product%20Image_ANGLE_White.jpg

324 ms

JBL_TUNE%20115TWS_Product%20Image_Hero_Mint.jpg

JBL_TUNE%20115TWS_Product%20Image_Hero_Mint.jpg

317 ms

swatchImage_Teal_02.png

swatchImage_Teal_02.png

296 ms

1.JBL_TUNE_230NC_Product%20image_Hero_Black.jpg

1.JBL_TUNE_230NC_Product%20image_Hero_Black.jpg

291 ms

1.JBL_Quantum%20350%20Wireless_Product%20Image_Hero.jpg

1.JBL_Quantum%20350%20Wireless_Product%20Image_Hero.jpg

290 ms

security-logo.png

security-logo.png

291 ms

footer-logo-akg.png

footer-logo-akg.png

291 ms

footer-logo-hk.png

footer-logo-hk.png

291 ms

footer-logo-infinity.png

footer-logo-infinity.png

288 ms

footer-logo-jbl.png

footer-logo-jbl.png

292 ms

footer-logo-lexicon.png

footer-logo-lexicon.png

290 ms

footer-logo-levinson.png

footer-logo-levinson.png

290 ms

footer-logo-revel.png

footer-logo-revel.png

289 ms

sf_control_close.png

sf_control_close.png

80 ms

sf_control_icon_normal.svg

sf_control_icon_normal.svg

82 ms

menu.gif

menu.gif

78 ms

s.gif

s.gif

80 ms

unchecked.gif

unchecked.gif

79 ms

sf_menu_log.png

sf_menu_log.png

78 ms

sf_menu_preview.png

sf_menu_preview.png

80 ms

bg_sf_menu.gif

bg_sf_menu.gif

80 ms

grid3-hrow.gif

grid3-hrow.gif

82 ms

grid3-hd-btn.gif

grid3-hd-btn.gif

83 ms

drop-no.gif

drop-no.gif

83 ms

col-move-top.gif

col-move-top.gif

123 ms

col-move-bottom.gif

col-move-bottom.gif

83 ms

__Analytics-Start

__Analytics-Start

44 ms

gen_204

gen_204

217 ms

ajax-loader.gif

ajax-loader.gif

187 ms

19fbca5d

19fbca5d

161 ms

1993755109-0

1993755109-0

92 ms

otSDKStub.js

otSDKStub.js

89 ms

arrow-left.png

arrow-left.png

88 ms

arrow-right.png

arrow-right.png

88 ms

slick.woff

slick.woff

55 ms

slick.ttf

slick.ttf

69 ms

slick.svg

slick.svg

28 ms

Accessibility Review

dev.jbl.com accessibility score

89

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.

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

<frame> or <iframe> elements do not have a title

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

dev.jbl.com best practices score

67

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

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

dev.jbl.com SEO score

70

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

High

Page is blocked from indexing

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 doesn't use 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 Dev.jbl.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 Dev.jbl.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

dev.jbl.com

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