Your data, and what this site does with it

The short version

This site sets no cookies, runs no analytics, uses no advertising, and contains no third-party trackers or fingerprinting. Nothing follows you across the web.

It does not sell, share, or build profiles of its visitors, and it asks you for nothing in order to read it.

The interactive tools run entirely in your browser. What you paste or type into them stays on your device and is not transmitted anywhere.

Only three things involve data at all, and each is explained below: a single theme setting saved in your own browser, the standard connection logs that every website visit creates at the hosting layer, and any message you choose to send by email.

Who is responsible

This is the personal website of Rodolfo Nützmann (ronutz.com). For any privacy question, or to exercise any of the rights described below, write to hello [at] ronutz.com. Enquiries are handled directly by Rodolfo Nützmann, as the data controller.

No cookies, no tracking, no analytics

This site sets no cookies of any kind. It uses no analytics service (such as Google Analytics or Plausible), no advertising network, no social-media tracking pixels, and no device fingerprinting. Your visit is not measured, profiled, or shared with anyone for those purposes.

What is stored in your browser

One small thing: your chosen visual theme, saved in your browser's local storage so the site can remember it the next time you visit. It is a convenience setting that stays on your own device, is never sent to this site or to anyone else, and can be cleared at any time through your browser. No other data about you is stored on your device.

Hosting and server logs

The site is delivered through Cloudflare, which provides its hosting and content delivery. As with any website, loading a page means your device connects to a server, and Cloudflare, acting as the hosting provider, processes basic connection data, including your IP address and standard request details, in order to deliver the pages to you and to protect the site against abuse and attack. This processing is necessary to operate and secure the site (a legitimate interest under GDPR Article 6(1)(f), and the corresponding bases under LGPD Articles 7 and 10). It is retained only briefly by the provider and is not used here to identify or track you.

The tools run in your browser

The decoders and calculators on this site, for JWTs, IP addresses, certificates and the rest, compute entirely within your browser. The values you enter are processed on your own device and are never sent to a server. A separate programmatic interface (an API) is offered for automation and integrations; by design it is stateless and logs none of the queries or request bodies sent to it.

If you contact me

The contact form does not submit to any server. Instead it opens a pre-filled message in your own email application, which you then send yourself from your own account, so nothing passes through a third party. If you do write, whether through the form or directly, I receive the information you include, such as your name, email address and message, and use it only to reply to you. I keep it only for as long as needed to deal with your enquiry, do not use it for marketing, and do not share it.

Processing outside your country

Because Cloudflare operates a global network, the connection-level processing described above may take place on servers located outside your own country, including outside Brazil and the European Economic Area. Where personal data is handled internationally in this way, it is processed under the safeguards offered by the provider concerned.

Children

This site is intended for a professional, general audience. It is not directed at children and does not knowingly collect personal data from them.

Your rights

Depending on where you live, you have rights over your personal data, including to access it, to have it corrected or deleted, to object to or restrict its processing, to request a copy in a portable form, and to be told how it is handled. To exercise any of these, simply write to hello [at] ronutz.com. Because so little personal data is ever processed here, in practice there is usually very little to act on, but the channel is always open.

If you are in the European Economic Area or the United Kingdom, you also have the right to lodge a complaint with your local data protection supervisory authority.

If you are in Brazil, you hold the rights set out in Article 18 of the LGPD, and may also contact the national data protection authority (the ANPD).

Changes to this notice

If this notice changes, the revised version will be published on this page and the date below will be updated. Material changes will not be applied retroactively.

Last updated: 30 June 2026