University of Hertfordshire - 10007147ACTIVE

Emissions

• URL: https://www.herts.ac.uk/

  Time to load: 1.6 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	1.26	5.0MB	GRID?
  2022-09-06	2.67	4.4MB	GRID?
  2022-06-09	1.76	2.9MB	GRID?
  2022-04-12	2.81	4.7MB	GRID?
  2022-02-01	2.75	4.6MB	GRID?
  2021-11-03	2.19	3.6MB	GRID?
  2021-10-06	2.80	4.6MB	GRID?
  2021-09-01	3.48	5.8MB	GRID?
  2021-07-29	2.91	4.8MB	GRID?
  2021-06-30	3.50	5.8MB	GRID?
  2021-06-01	3.13	5.2MB	GRID?

  Tip: Optimise images

  We estimate potential to save at least 2.2MB* by optimising images:

  1. Spectra-aerial-const... is 780kB and could be 576kB smaller
  2. Patrick-Holthaus-hom... is 693kB and could be 588kB smaller
  3. Spin-outs-homepage.jpg is 440kB and could be 332kB smaller
  4. Festival-of-Ideas-im... is 247kB and could be 175kB smaller
  5. 7526-086-virtual-ope... is 246kB and could be 92kB smaller
  6. 1042-148-Open-Day.jpg is 209kB and could be 125kB smaller
  7. 6628-Engineering-086... is 186kB and could be 117kB smaller
  8. Research-England-awa... is 144kB and could be 78kB smaller
  9. 3590-Chat-to-student... is 141kB and could be 90kB smaller
  10. Live-on-campus-card.... is 122kB and could be 61kB smaller

  First, check that images are appropriately sized - you most likely don't need a 6000x4000 pixel image straight from a digital camera. In Windows, the Photos software will let you quickly shrink huge images and will give you an improvement.

  Next you could try using tinyjpg.com (JPG image) or tinypng.com (PNG image) to further optimise your image. This will strip out metadata that may be taking up lots of space.

  *This is an estimate from Google PageSpeed and you may get much better results than this in practice.

  Tip: Large files

  Aside from images, here are the biggest resources:

  1. HelveticaNowText-Regular.ttf is 126kB

  The page uses 1 font which requires 126kB. Could system fonts be used instead? There are 1 TTF/OTF fonts on the page - WOFF2 versions of these fonts may be smaller.

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Google Tag Manager uses 219kB
  2. TikTok uses 157kB
  3. Facebook uses 174kB
  4. Optanon uses 172kB
  5. FontAwesome CDN uses 141kB
  6. Google Analytics uses 73kB
  7. Hotjar uses 60kB
  8. provesrc.com uses 58kB

  Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading.