Privacy Policy

Last updated: September 2026

This policy covers gsonego.com, a personal site run by Guilherme Sonego Neto. It explains what data is collected across the site, including the Toolbox under /tools/, and how advertising on this site works.

Toolbox

The utilities under /tools/ (CPF, CNPJ, GUID, credit card, IBAN generators and the JWT decoder) run entirely in your browser. Anything you type into or generate with those tools is never sent to a server or stored — it stays on your device. See the disclaimer on each tool's page for details.

Cookies & advertising (Google AdSense)

This site uses Google AdSense to show ads on the homepage and the Toolbox hub page. Google and its advertising partners may use cookies, device identifiers, and similar technologies to serve ads based on your prior visits to this or other websites.

If you're in the EEA, the UK, or Switzerland, you'll see a consent prompt before any personalized advertising cookies are set, and you can change your choice at any time through that prompt's "Manage options" link.

You can learn more about how Google uses data from sites that use its services at policies.google.com/technologies/partner-sites, and manage your ad personalization settings at adssettings.google.com.

Other links

This site links out to third-party services (LinkedIn, GitHub, educato.com.br). Their own privacy policies apply once you leave gsonego.com.

Children's privacy

This site is not directed at children under 16, and no data is knowingly collected from them.

Contact

Questions about this policy can be sent to [email protected].