Westpac

1. Oct 2026

First measured October 2026.

1. SBS Bank, 1.23 MB
2. ASB, 1.40 MB
3. TSB, 1.42 MB
4. Heartland Bank, 1.71 MB
5. Kiwibank, 1.73 MB
6. Westpac, 1.74 MB
7. ANZ, 2.01 MB
8. Co-operative Bank, 2.03 MB
9. BNZ, 2.27 MB

1. C
2. C
3. D
4. D
5. D
6. D
7. E
8. E
9. E

LightestHeaviest

• Westpac

• Phone

  2.9 MB

• Laptop

  3.1 MB

First visitiReturningi

1. Homepage

   /

   First visit

   Phone 2.9 MB

   Laptop 3.1 MB

   Returning

   Phone 1.5 MB

   Laptop 1.6 MB

2. Mortgages

   /home-loans-mortgages/

   First visit

   Phone 2.1 MB

   Laptop 2.3 MB

   Returning

   Phone 0.62 MB

   Laptop 0.78 MB

3. Credit cards

   /credit-cards/

   First visit

   Phone 1.9 MB

   Laptop 2.0 MB

   Returning

   Phone 0.48 MB

   Laptop 0.59 MB

4. Everyday accounts

   /accounts-cards/

   First visit

   Phone 2.0 MB

   Laptop 2.4 MB

   Returning

   Phone 0.27 MB

   Laptop 0.76 MB

5. Contact

   /contact-us/

   First visit

   Phone 1.7 MB

   Laptop 1.9 MB

   Returning

   Phone 0.34 MB

   Laptop 0.48 MB

• Westpac’s own files

  This website

  1.7 MB59%

• Google Tag Manager

  Tag manager

  0.50 MB17%

• TikTok

  Advertising and social

  0.16 MB5%

• Facebook

  Advertising and social

  0.15 MB5%

• 5 more companies

  Adobe Tag Manager, Tag manager, 0.15 MB
  Qualtrics, Analytics, 0.13 MB
  Dynatrace, Analytics, 0.06 MB
  LinkedIn Ads, Advertising and social, 0.02 MB
  The Trade Desk, Advertising and social, 0.02 MB

  0.38 MB13%

• Scripts

  1.5 MB

• Images

  1.2 MB

• Fonts

  0.17 MB

• Styles

  0.04 MB

• Other

  0.03 MB

1. Image · Westpac

   lifestyle-parent-baby-shopping-161020__ScaleMaxWidthWzEyMDBd_ExtRewriteWyJqcGciLCJ3ZWJwIl0.webp

   Accounts & cards

   0.27 MB

2. Script · Google Tag Manager

   googletagmanager.com/gtag/js

   Every page

   0.20 MB

3. Script · Westpac

   app.48bbac820ca40357.js

   Every page

   0.16 MB

4. Script · Westpac

   app.c77a80b63a41f4b7.js

   Every page

   0.16 MB

5. Image · Westpac

   Westpacs-community-banking-van__ScaleMaxHeightWzI1MF0.png

   Homepage

   0.16 MB

Fix

Nothing a visitor would notice

Choice

Removes or delays something

Worked out on a phone and a laptop. The icons show where each saving applies.

1. Choice

   Check every marketing tag still earns its place: 8 companies

   Every page · several companies

   up to 0.41 MB

2. Fix

   Next pages download what the homepage already did

   Every page · Westpac

   up to 0.38 MB

3. Fix

   Resize 23 images to the size screens show them

   Every page · Westpac

   up to 0.18 MB

4. Fix

   Send next pages as differences from the last one (shared compression dictionaries), in Chrome, Edge and other Chromium browsers. Safari and Firefox do not support it yet.

   Home loans and 3 more · Westpac

   Home loans, Credit cards, Accounts & cards, Contact us.

   up to 0.07 MB

5. Fix

   Compress 53 of your own text files

   Every page · Westpac

   up to 0.06 MB

If this website had 100,000 page views a year, they would cause about 16 kg of carbon emissions.

Built to grade A (under 0.53 MB a page), the same page views would cause about 4.8 kg.

A grade C badge needs a typical page under 1.41 MB. Westpac’s is 1.74 MB.