Analyse your website's ecodesign maturity

Browse it

For decision-makers and IT professionals, ECOMETER assesses the environmental impact of your online service on all phases of its life cycle.

Test it green

ECOMETER tests 115 ecodesign best practices from the reference book published by Eyrolles, with contributions by more than 34 business experts.

Improve it

Internationally intended, conducted with ADEME's financial support, ECOMETER is community driven, open-source, free and pedagogically oriented.

The results given by this tool are for educational and diagnostic purpose only, it is not intended to compare websites.
This tool is in beta version and still in active development, all given informations may change in the future.

Best pratice examples...

From design to hosting, 115 best practices are tested and explained. Here are some examples, but be sure to check the other ones:

Development #43

Do not modify the DOM when traversing

Modifying the DOM (Document Object Model) as you traverse it risks making the loop highly resource-expensive, especially in terms of CPU usage. An infinite loop, which consumes a huge amount of resources, might be generated if we add elements at the same time as we traverse it. It is thus highly recommended to NOT perform such edits.

Learn more about this best pratice

Development #42

Keep repaint (appearance) and reflow (layout) to a minimum

A repaint is a change in appearance of a DOM (Document Object Model) element, while a reflow is a change/recalculation of the position of the elements in the DOM. You should avoid triggering these two operations as they are resource-expensive, especially in terms of CPU usage.

Learn more about this best pratice

With the support of


The collaborative approch of ecometer tool's creation has been supported by ADEME Bourgogne Franche-Comté within the scope of the 2015 call for projects about Circular Economy.


AER Atol Conseils & Développements Cadoles

Logomotion Planet Bourgogne Pulsar DS Bourgogne Franche-Comté Numérique