Builder

Use this builder to create a carbon.txt file for your organisation.
The builder uses the latest version (v0.6) of the carbon.txt syntax. Learn more.

Your carbon.txt file

Use the form below to enter your data, and the code here will update automatically. When you're done you can download or copy the completed carbon.txt file.

version="0.6"
last_updated=2026-10-12

[org]
certification_schemes = [ ]

disclosures = [ ]

[upstream]
services = [ ]

Optional

Step 1: Certification schemes

If you are certified by any third party certification schemes, for instance Blauer Engel, B-Corp, or TCO Certified Cloud, list them here.

If you have no third party certifications, you can continue straight on to Step 2.

Do you have certifications you’d like to include? E.g.: ecolabels, or membership of organizations like B-corp

Required

Step 2: Organisational disclosures

List the documents that show evidence of your green claims, such as CSRD, EED, ESG and/or other sustainability reporting.

URL The publicly accessible URL for the document.

Document type The type of document that is being linked to - see our FAQ for a more detailed explanation of each option.

Valid until (Optional) The last date that this disclosure is valid for, if it is time-limited.

Title (Optional) A meaningful title describing the disclosure.

Description (Optional) Optionally, a brief description or summary of the disclosure - the key claims it makes about your organisation's sustainability policy or climate impact.

Optional

Step 3: Upstream services

List the services providers you use to deliver your service.

Domain The domain of the provider who's services you use. Do not include the protocol (i.e. http:// or https://) or any content paths (e.g "/news/", "/about", "news-update-2025" etc.).

Service type A short name for the service provided.

What is carbon.txt?

If you're new to carbon.txt our overview will help you get primed on the basics.

Read overview