Web Sustainability Guidelines

The Web Sustainability Guidelines can help web teams create digital products and services that work better for all people and our shared planet. These guidelines were created by the World Wide Web Consortium's (W3C) Sustainable Web Interest Group.

They will be published as an official W3C Note in April 2026.

Select a category, tag, or individual guideline below to learn more.

3.10 Validate form errors and account for tooling requirements

Web Development

3.11 Structure metadata for machine readability

Web Development

3.12 Use sustainability beneficial user preference media queries

Web Development

3.13 Ensure layouts work for different devices and requirements

Web Development

3.14 Use standards-based JavaScript and APIs

Web Development

3.15 Ensure that your code is secure

Web Development

3.16 Use dependencies appropriately and ensure maintenance

Web Development

3.17 Include expected and beneficial files

Web Development

3.18 Use the most efficient solution for your service

Web Development

3.19 Use the latest stable language version

Web Development

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