One NZ

1. Oct 2026

First measured October 2026.

1. Orcon, 1.36 MB
2. Quic, 1.42 MB
3. Bigpipe, 1.66 MB
4. Warehouse Mobile, 1.87 MB
5. Voyager, 2.21 MB
6. Skinny, 2.72 MB
7. Slingshot, 3.20 MB
8. Farmside, 4.24 MB
9. One NZ, 4.34 MB
10. Spark, at least 5.68 MB
11. 2degrees, 8.82 MB

1. C
2. D
3. D
4. D
5. E
6. F
7. F
8. F
9. F
10. G
11. G

LightestHeaviest

• One NZ

• Phone

  4.62 MB

• Laptop

  6.73 MB

First pageiLater pagei

1. Homepage

   /

   First page

   Phone 4.62 MB

   Laptop 6.73 MB

   Later page

   Phone 0.64 MB

   Laptop 2.90 MB

2. Mobile plans

   /mobile/

   First page

   Phone 4.58 MB

   Laptop 6.83 MB

   Later page

   Phone 0.51 MB

   Laptop 2.99 MB

3. Broadband

   /broadband/

   First page

   Phone 5.10 MB

   Laptop 7.22 MB

   Later page

   Phone 0.77 MB

   Laptop 3.76 MB

4. Coverage

   /help/network-status/

   First page

   Phone 3.27 MB

   Laptop 3.22 MB

   Later page

   Phone 1.85 MB

   Laptop 1.78 MB

5. Contact

   /contact/

   First page

   Phone 3.18 MB

   Laptop 6.28 MB

   Later page

   Phone 1.13 MB

   Laptop 4.23 MB

• One NZ’s own files

  This website

  1.36 MB29%

• Google Tag Manager

  Tag manager

  0.56 MB12%

• Qualtrics

  Analytics

  0.24 MB5%

• Facebook

  Advertising and social

  0.23 MB5%

• 4 more companies

  Evergage, Analytics, 0.05 MB
  LinkedIn Ads, Advertising and social, 0.02 MB
  The Trade Desk, Advertising and social, 0.02 MB
  Yahoo!, Advertising and social, 0.01 MB

  0.10 MB2%

• Unknown source

  2.14 MB46%

• Scripts

  2.55 MB

• Styles

  0.81 MB

• Images

  0.58 MB

• Other

  0.48 MB

• Fonts

  0.21 MB

1. Image · Unknown source

   onenz.brightspotcdn.com/dims4/default/92ccc8c/2147483647/strip/true/crop/2400x900+0+0/resize/1920x720!/quality/90

   Mobile plans

   1.63 MB

2. Image · Unknown source

   onenz.brightspotcdn.com/dims4/default/e812327/2147483647/strip/true/crop/2400x900+0+0/resize/1920x720!/quality/90

   Broadband

   1.53 MB

3. Image · One NZ

   messages.png

   Contact

   1.45 MB

4. Image · Unknown source

   onenz.brightspotcdn.com/dims4/default/ac8c5d8/2147483647/strip/true/crop/2400x900+0+0/resize/1920x720!/quality/90

   Homepage

   1.42 MB

5. Image · Unknown source

   onenz.brightspotcdn.com/dims4/default/3a1d07c/2147483647/strip/true/crop/2880x800+0+0/resize/1920x533!/quality/90

   Broadband

   1.06 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. Fix

   Compress 20 of your own text files

   Every page · One NZ

   Saves this on every page

   at least 0.88 MB

2. Choice

   Check every marketing tag still earns its place: 10 companies

   Every page · several companies

   Saves this on every page

   up to 0.59 MB

3. Fix

   Ship less of your own code: scripts and styles that did not run while the homepage loaded

   Every page · One NZ

   Saves this on every page

   up to 0.22 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.

   Mobile plans and 2 more · One NZ

   Mobile plans, Broadband, Coverage

   Saves most on the Coverage page

   up to 0.17 MB

5. Fix

   Cut 5 fonts down to the characters used

   Homepage and 3 more · One NZ Phone

   Homepage, Mobile plans, Coverage, Contact

   Saves most on the Coverage page

   up to 0.07 MB

If this website had 100,000 page views a year, they would cause about 39 kg of carbon emissions.

Built to grade A (an average page view of 0.53 MB or less), the same page views would cause about 4.8 kg.

A grade C badge needs an average page view of 1.41 MB or less. One NZ’s is 4.34 MB.