Last Updated: June 30, 2026
By accessing or using one4.dev and RegexRef, you agree to be bound by these Terms of Service. If you disagree with any part of the terms, then you may not access the service.
one4.dev provides a suite of developer tools, including RegexRef, an interactive regular expression cheat sheet and testing playground. Some features (such as AI regex generation or saving patterns) may require an account or a paid "Pro" subscription.
When you create an account with us, you must provide information that is accurate, complete, and current at all times. You are responsible for safeguarding the password or OAuth credentials that you use to access the service.
The service and its original content (excluding user-provided data), features, and functionality are and will remain the exclusive property of one4.dev and its licensors. The site layout, custom design elements, and interactive playgrounds are protected by copyright.
In no event shall one4.dev, nor its directors, employees, partners, agents, suppliers, or affiliates, be liable for any indirect, incidental, special, consequential or punitive damages, including without limitation, loss of profits, data, use, goodwill, or other intangible losses, resulting from your access to or use of or inability to access or use the service.
The regular expressions provided in our library are for educational and reference purposes. We are not liable for any security vulnerabilities or bugs introduced into your codebase by using patterns generated or copied from this site.
We reserve the right, at our sole discretion, to modify or replace these Terms at any time. What constitutes a material change will be determined at our sole discretion.
If you have any questions about these Terms, please contact us at support@one4.dev.