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onEco® +Analytics Pro Beta

Simple Carbon Checker

Know exactly what your pages cost the planet. Precise analysis measuring page weight, calculated CO₂ per view, and verified green hosting indicators. No technical knowledge required.

Is this your website?
  • Build trust with reliable baselines for sustainability reports
  • Discover exactly what's slowing you down and polluting
  • Share proof of your commitment with permanent result pages

Reduce your digital emissions

Turn every landing page into proof of your commitment. Establish reliable baselines and watch your impact improve, measured and verified. Start in seconds.

Precise asset measurement

Systematic measurement of HTML, CSS, JS, images, video, and fonts to identify the largest contributors to emissions.

Verified hosting status

Automated verification of Green Web Foundation certification for hosting infrastructure.

Systematic benchmarking

Each analysis benchmarks your page against our verified eco dataset and provides specific optimization recommendations.

AI-powered insights

Transform emissions data into clear summaries for stakeholders or get technical guidance with optimization recommendations.

What data powers the Simple Carbon Checker?
We combine transfer size readings with energy-intensity factors from the Sustainable Web Design model plus verified Green Web Foundation hosting data.
Does running the check require installing anything?
No installation required. Provide a public URL and our system handles everything automatically. Results are ready in seconds.
Can I share the results with my team?
Each carbon check generates a permanent link on onEco +Analytics Pro that you can share with stakeholders or embed in reports.
Can someone help me with understanding the results?
Yes. Get AI-generated Executive Summaries that translate carbon metrics into business insights, or Developer Assistance with detailed explanations and optimization guidance. Available on every check result page.
Can I check Single-Page Applications (SPAs)?
Yes. The Simple Carbon Checker fully supports SPAs and JavaScript-heavy sites, accurately measuring frameworks like React, Vue, Angular, and similar implementations.