Terms of Service

Last updated: October 31, 2025

Important

By using CoreVitals.io, you agree to these Terms of Service. This is a free tool provided "as-is" for informational purposes only. Please read carefully.

1. Acceptance of Terms

By accessing and using CoreVitals.io (the "Service"), you accept and agree to be bound by these Terms of Service ("Terms"). If you do not agree to these Terms, please do not use the Service.

We reserve the right to modify these Terms at any time. Your continued use of the Service after changes are posted constitutes acceptance of the modified Terms.

2. Description of Service

CoreVitals.io provides a free web-based tool for testing website performance using Google's Core Web Vitals metrics. The Service includes:

  • Performance testing via Google PageSpeed Insights API
  • Core Web Vitals analysis (LCP, FID, CLS)
  • Performance recommendations and insights
  • Historical tracking stored locally in your browser
  • Competitor comparison tools

3. Use License

Permission is granted to use CoreVitals.io for personal and commercial purposes, subject to the following conditions:

You may:

  • Use the Service to test any publicly accessible website
  • Share your test results
  • Use the Service for commercial website optimization

You may not:

  • Attempt to reverse engineer or copy the Service
  • Use automated tools to scrape or abuse the Service
  • Use the Service for illegal or unauthorized purposes
  • Attempt to overload or harm the Service infrastructure

4. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS-IS" AND "AS AVAILABLE" WITHOUT ANY WARRANTIES OF ANY KIND.

CoreVitals.io makes no warranties, expressed or implied, and hereby disclaims all warranties including, without limitation:

  • Accuracy, reliability, or completeness of test results
  • Fitness for a particular purpose
  • Uninterrupted or error-free operation
  • That results will improve your search rankings
  • That recommendations will solve performance issues

Test results are estimates only and may vary based on network conditions, server load, geographic location, and testing methodology.

5. Limitation of Liability

IN NO EVENT SHALL COREVITALS.IO BE LIABLE FOR ANY DAMAGES INCLUDING, WITHOUT LIMITATION:

  • Loss of profits, revenue, or business opportunities
  • Website downtime or performance issues resulting from following recommendations
  • Inaccurate test results or analysis
  • Data loss or corruption
  • Any indirect, incidental, special, or consequential damages

You use the Service entirely at your own risk. Always verify findings with multiple tools and consult qualified professionals before making significant website changes.

6. Third-Party Services

The Service relies on Google PageSpeed Insights API and other third-party services. We are not responsible for:

  • Availability or accuracy of third-party APIs
  • Changes to third-party services that affect our tool
  • Third-party terms of service or privacy policies

Use of third-party services through CoreVitals.io is subject to their respective terms and policies.

7. Informational Purposes Only

The Service and all information provided is for informational and educational purposes only. CoreVitals.io is not:

  • Professional consulting or advisory services
  • A guarantee of improved search rankings or website performance
  • A substitute for professional web development expertise
  • Certified or endorsed by Google

Do not rely solely on this tool for critical business, SEO, or development decisions.

8. No Account Required

CoreVitals.io does not require user accounts or registration. You may use the Service anonymously. All test results are stored locally in your browser and are not transmitted to our servers.

9. Fair Use Policy

The Service is free and intended for reasonable, fair use. We reserve the right to:

  • Implement rate limiting to prevent abuse
  • Block automated requests or excessive usage
  • Suspend or terminate access for violations

Please do not abuse the Service with automated scraping or excessive requests.

10. Intellectual Property

The Service design, code, and content are owned by CoreVitals.io and protected by copyright laws. Test results generated by the Service are yours to use freely.

"Core Web Vitals" is a trademark of Google LLC. We are not affiliated with Google.

11. Termination

We reserve the right to terminate or suspend access to the Service at any time, without notice, for any reason including violation of these Terms or technical maintenance.

12. Governing Law

These Terms shall be governed by and construed in accordance with applicable laws. Any disputes arising from use of the Service shall be resolved in the appropriate jurisdiction.

13. Contact Information

If you have questions about these Terms, please email us at legal@corevitals.io.

Summary

In plain English:

  • CoreVitals.io is a free tool - use it however you want
  • Results are for informational purposes - verify with other tools
  • We're not liable if something goes wrong - use at your own risk
  • Don't abuse the service with automated tools
  • Always consult professionals for important decisions
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