Green Host Checker

What Does It Mean for a Host to Be Green?

Not all green claims are equal. Some hosting providers genuinely run on renewable energy. Others purchase certificates to offset what they consume. A few just use the word “green” without anything behind it.

The tool above checks against the Green Web Foundation, an independent non-profit that maintains the most comprehensive public directory of verified green hosting providers. They require providers to submit actual evidence: energy supply contracts, audited renewable energy certificates, or power purchase agreements. Marketing language doesn’t qualify.

A green result from this tool means the hosting provider has submitted verifiable evidence and passed the Foundation’s review. A grey result means they’re not currently in the verified dataset, which could mean several things: they haven’t applied, their application is pending, or they simply don’t have verified green credentials in place.

How the Tool Works

Enter any domain or URL and click Check Host. The tool queries the Green Web Foundation’s Greencheck API and returns the current verification status for that domain’s hosting provider.

The URL is cleaned automatically. You can enter https://www.example.com/page or just example.com and get the same result. The tool strips the protocol, www prefix, and any path before making the check.

Results are based on the Green Web Foundation’s live dataset, which is updated regularly as providers submit new evidence or renew their credentials.

What the Results Mean

Green result: The hosting provider for this domain has been verified by the Green Web Foundation. Their green credentials have been independently reviewed and confirmed. The result will show the provider’s name and, where available, a link to our full review of that host.

Grey result: The host is not currently listed in the Green Web Foundation’s verified dataset. This doesn’t automatically mean the host has no green practices, but it does mean there’s no independently verified evidence available. If sustainability matters to your site, it’s worth checking whether the host has published any verifiable environmental commitments.

Why It Matters

Every page load uses energy. The servers hosting your website run around the clock, and the electricity they consume has a carbon cost unless it comes from renewable sources.

For most site owners, the choice of hosting provider is one of the easiest environmental decisions to make. Switching to a verified green host typically costs the same as staying on a non-green one. The performance difference is negligible. The environmental difference is real.

If you’re evaluating a host’s green credentials in more depth, our eco-friendly hosting guide covers the verified providers we’ve reviewed in detail, including which use direct renewable energy, which use renewable energy certificates, and what the difference between those approaches actually means.

About the Data

This tool is powered by the Green Web Foundation’s public Greencheck API. The Green Web Foundation is an independent non-profit based in the Netherlands that has tracked the environmental footprint of web hosting since 2009. Their dataset has been accessed over 1.5 billion times.

We use their API with full credit and transparency. The data reflects their current verified dataset. If you believe a result is incorrect, the most likely cause is that the hosting provider’s IP addresses or infrastructure details haven’t been updated in the Foundation’s records. Hosting providers can submit evidence and apply for verification directly through the Green Web Foundation at no cost.

Common Questions About Green Hosting

Why does my host show as Cloudflare or Google?

Many hosting providers run their infrastructure on platforms like Cloudflare or Google Cloud. When this is the case, the Green Web Foundation may return the infrastructure provider rather than the hosting brand. Cloudflare and Google both have verified renewable energy commitments, so a green result via either of these platforms is still a genuinely green outcome.

My host isn’t in the results. Does that mean they’re not green?

Not necessarily. The Green Web Foundation’s dataset only includes providers who have actively submitted verified evidence. Some hosts with genuine green practices haven’t applied for listing. A grey result means unverified, not necessarily unsustainable. Check whether your host publishes an environmental policy or sustainability report directly.

How often is the Green Web Foundation data updated?

The dataset is updated continuously as providers submit new evidence or renew their credentials. Providers are required to resubmit evidence periodically to maintain their listing. If a provider’s credentials expire and aren’t renewed, they may be removed from the verified list.

What changed for carbon offsets in 2026?

In January 2026, the Green Web Foundation updated their verification criteria. Carbon offsets alone are no longer accepted as sufficient evidence for a fossil-free hosting claim. Providers now need to demonstrate renewable energy sourcing or verified REC purchases. Offsets can still be mentioned as supplementary measures but are no longer the basis for listing.

How is this different from the Green Web Foundation’s own checker?

It works the same way under the hood: both use the same GWF Greencheck API. The main difference is context. Our tool links directly to TSH reviews of verified providers so you can go deeper on any host that comes up in your check, and it connects to our broader eco-friendly hosting guide for comparison.