Tools & Wizards About Us
alcoa.com screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

alcoa.com

Alcoa -- Home

Page Load Speed

1.8 sec in total

First Response

143 ms

Resources Loaded

1.5 sec

Page Rendered

251 ms

alcoa.com screenshot

About Website

Welcome to alcoa.com homepage info - get ready to check Alcoa best content for Australia right away, or after learning these important things about alcoa.com

Discover how Alcoa is reinventing the aluminum industry through sustainable products and processes, environmental stewardship, and equitable career opportunities.

Visit alcoa.com

Key Findings

We analyzed Alcoa.com page load time and found that the first response time was 143 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

alcoa.com performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.8 s

0/100

10%

LCP (Largest Contentful Paint)

Value10.2 s

0/100

25%

SI (Speed Index)

Value7.8 s

24/100

10%

TBT (Total Blocking Time)

Value320 ms

76/100

30%

CLS (Cumulative Layout Shift)

Value0.021

100/100

15%

TTI (Time to Interactive)

Value12.1 s

16/100

10%

Network Requests Diagram

alcoa.com

143 ms

home.asp

370 ms

nav_main.js

84 ms

styles.css

123 ms

jquery-1.7.1.min.js

264 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 80% of them (53 requests) were addressed to the original Alcoa.com, 5% (3 requests) were made to Youtube.com and 5% (3 requests) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (541 ms) belongs to the original domain Alcoa.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (38%)

Content Size

2.8 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Alcoa.com main page is 2.8 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. 55% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 72.5 kB

  • Original 94.3 kB
  • After minification 89.3 kB
  • After compression 21.8 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 72.5 kB or 77% of the original size.

Image Optimization

-6%

Potential reduce by 89.7 kB

  • Original 1.4 MB
  • After minification 1.3 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. Alcoa images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 650.8 kB

  • Original 965.0 kB
  • After minification 941.4 kB
  • After compression 314.2 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 650.8 kB or 67% of the original size.

CSS Optimization

-84%

Potential reduce by 259.5 kB

  • Original 309.2 kB
  • After minification 291.1 kB
  • After compression 49.6 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. Alcoa.com needs all CSS files to be minified and compressed as it can save up to 259.5 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (38%)

Requests Now

64

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Alcoa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

alcoa.com

alcoa.com

143 ms

home.asp

home.asp

370 ms

nav_main.js

nav_main.js

84 ms

styles.css

styles.css

123 ms

jquery-1.7.1.min.js

jquery-1.7.1.min.js

264 ms

jquery-ui-1.8.18.custom.min.js

jquery-ui-1.8.18.custom.min.js

155 ms

jquery.css

jquery.css

130 ms

home.css

home.css

225 ms

jquery.banner_slider.js

jquery.banner_slider.js

139 ms

in.js

in.js

14 ms

ga_extras.js

ga_extras.js

197 ms

addthis_widget.js

addthis_widget.js

8 ms

top_alcoa_logo_wide.gif

top_alcoa_logo_wide.gif

44 ms

spacer.gif

spacer.gif

148 ms

blue_top_nav_arrow.gif

blue_top_nav_arrow.gif

155 ms

print_blue.gif

print_blue.gif

138 ms

bckgrn_blue.gif

bckgrn_blue.gif

131 ms

hero-fourth-boeing-contract.jpg

hero-fourth-boeing-contract.jpg

132 ms

hero-ge-contract.jpg

hero-ge-contract.jpg

226 ms

hero-boeing-contract.jpg

hero-boeing-contract.jpg

158 ms

hero-davenport-vr-tour.jpg

hero-davenport-vr-tour.jpg

179 ms

hero-id2015.jpg

hero-id2015.jpg

293 ms

hero-laporte-opens.jpg

hero-laporte-opens.jpg

541 ms

hero-f35.jpg

hero-f35.jpg

531 ms

hero-airbus.jpg

hero-airbus.jpg

291 ms

hero-two-strong-companies.jpg

hero-two-strong-companies.jpg

278 ms

hero-tn-auto-expansion.jpg

hero-tn-auto-expansion.jpg

290 ms

box_bullet.gif

box_bullet.gif

311 ms

left-arrow.png

left-arrow.png

365 ms

right-arrow.png

right-arrow.png

362 ms

spotlight-value-add.jpg

spotlight-value-add.jpg

364 ms

spotlight-upstream.jpg

spotlight-upstream.jpg

364 ms

story-1.jpg

story-1.jpg

415 ms

story-2.jpg

story-2.jpg

417 ms

story-3.jpg

story-3.jpg

417 ms

auto-market.jpg

auto-market.jpg

501 ms

aerospace-market.jpg

aerospace-market.jpg

429 ms

building-construction-market.jpg

building-construction-market.jpg

418 ms

packaging-market.jpg

packaging-market.jpg

419 ms

consumer-electronics-market.jpg

consumer-electronics-market.jpg

466 ms

commercial-transportation-market.jpg

commercial-transportation-market.jpg

467 ms

oil-gas-market.jpg

oil-gas-market.jpg

467 ms

defense-market.jpg

defense-market.jpg

499 ms

alumina-market.jpg

alumina-market.jpg

499 ms

aluminum-market.jpg

aluminum-market.jpg

517 ms

aa-employees.jpg

aa-employees.jpg

511 ms

facebook-icon.jpg

facebook-icon.jpg

517 ms

secureAnonymousFramework

secureAnonymousFramework

117 ms

twitter-icon.jpg

twitter-icon.jpg

514 ms

iframe_api

iframe_api

110 ms

linkedin-icon.jpg

linkedin-icon.jpg

522 ms

analytics.js

analytics.js

110 ms

youtube-icon.jpg

youtube-icon.jpg

440 ms

rss-icon.jpg

rss-icon.jpg

428 ms

mail-icon.jpg

mail-icon.jpg

427 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

436 ms

bckgrn_3dot.gif

bckgrn_3dot.gif

485 ms

www-widgetapi.js

www-widgetapi.js

23 ms

collect

collect

12 ms

nK5Ato_irdw

nK5Ato_irdw

105 ms

zAPrWNAaggQ

zAPrWNAaggQ

158 ms

www-embed-player-vflZsBgOl.css

www-embed-player-vflZsBgOl.css

68 ms

www-embed-player.js

www-embed-player.js

93 ms

6BOEML_YqI6cKINK5dmh8ZufcXg7sBa4jeB-I9gQ0xI.js

6BOEML_YqI6cKINK5dmh8ZufcXg7sBa4jeB-I9gQ0xI.js

37 ms

ad_status.js

ad_status.js

32 ms

print.css

print.css

75 ms

Accessibility Review

alcoa.com accessibility score

63

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.

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

ARIA IDs are not unique

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

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

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

alcoa.com 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

Missing source maps for large first-party JavaScript

SEO Factors

alcoa.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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Alcoa.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Alcoa.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

alcoa.com

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