See how your website impacts the planet

Website CO2 emissions calculator: see how your website impacts the planet!

Did you know that every web page online generates carbon emissions? Test your website, see what’s its carbon footprint and improve its energy efficiency.
How does the tool work?

  • Enter the complete web page address;
  • Click/Tap on the “Calculate” button;
  • See the result in seconds.

This tool is free and always will be: feel free to share it on and

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Carbon results for:

CO2 emitted in a year*

CO2 emitted compared to the average web page

CO2 emitted compared to the average web page

CO2 emitted compared to the average web page

Good job! This web page respects the environment!

Uh oh. It looks like this web page emits too much CO2!

The amount of CO2 this web page produces in a year* is equal to that produced by:

on an airliner
(CO2 emitted per passenger)

on your car
(CO2 emitted per passenger)

WHAT YOU CAN DO FOR A MORE SUSTAINABLE INTERNET

The environment is important for all of us and we must preserve it for our own well-being and that of future generations to come. Did you know that an optimized website emits less carbon, reducing global warming?

Here are 2 things you can do to further reduce the Web’s impact on the planet:

  1. Join the Karma Metrix project and certify the environmental sustainability of your site;
  2. Share the tool on , and on your social network of choice;

WHAT YOU CAN DO

The environment is important for all of us and we must preserve it for our own well-being and that of future generations to come. Did you know that an optimized website emits less Carbon, reducing global warming?

Here are 3 things you can do if you manage the website you just tested:

  1. Use compressed or smaller images;
  2. Reduce and optimize the use of external resources;
  3. Join the Karma Metrix project and certify the environmental sustainability of your site;

* Estimated amount of CO2 produced in a year by the web page, assuming an average of 10,000 visits per month