Privacy Policy

NumberLab ("NumberLab", "we", "us", or "our") provides free online calculators, converters, generators, and simulators at numberlab.io (the "Service"). This Privacy Policy explains what information is involved when you use the Service and how it is handled. By using the Service, you agree to the practices described here.

Information We Collect

NumberLab does not require you to create an account, log in, or provide any personal information to use the Service.

• Calculator inputs. Values you type into a calculator, converter, or generator form are sent to our server only to compute a result for that request. NumberLab has no database, so these values are not stored after the response is returned, and they are not shared with third parties.
• Standard server logs. Like most websites, our hosting environment may automatically log technical information such as IP address, browser user-agent, requested URL, and timestamp. These logs are used only for security, diagnostics, and abuse prevention.

Cookies

NumberLab itself sets only one cookie: a strictly-necessary anti-forgery (CSRF protection) token used to verify that form submissions come from our own pages. This cookie contains no personal information and is not used for tracking or advertising.

If ads or third-party embeds are shown on the Service (see below), those third parties may set their own cookies subject to their own policies.

Third-Party Services

• Content delivery networks. Bootstrap, Chart.js, and Font Awesome are loaded from jsDelivr and cdnjs. These providers may log standard request data (such as IP address) as part of normal content delivery.
• Google AdSense. NumberLab is registered with Google AdSense and may display advertisements on the Service. If ads are shown, Google and its advertising partners may use cookies or similar technologies to serve ads based on your visits to this and other sites. You can review Google's practices at policies.google.com/technologies/ads and manage ad personalization at adssettings.google.com.
• Buy Me a Coffee. The "Buy Me a Coffee" link in the footer takes you to a third-party donation platform with its own privacy practices.

How We Use Information

Any information involved in using the Service is used solely to operate, maintain, and secure the Service — for example, to compute the result you requested, keep the Service running reliably, and detect and prevent abuse. We do not sell personal information.

Data Security

The Service is served exclusively over HTTPS with HTTP Strict Transport Security (HSTS) enabled, and applies security headers including a Content Security Policy, X-Content-Type-Options, X-Frame-Options, and a strict Referrer-Policy.

Children's Privacy

The Service is not directed at children under 13, and we do not knowingly collect personal information from children.

Your Choices

You can control or delete cookies at any time through your browser settings. Because NumberLab does not maintain user accounts or profiles, there is no account data to access, export, or delete.

Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date.

Contact Us

Questions about this Privacy Policy can be sent to Help@Sprucesoftwarestudios.com.