systrexDiagnose the Internet

Privacy

/privacy

The short version: this site sets no cookies, runs no analytics, and loads nothing from anyone else. There is no account to create, so there is nothing to hold about you.

What this site does not do

  • No cookies are set. Not for sessions, not for anything else.
  • No analytics, no tag manager, no pixel, no fingerprinting script.
  • No third-party requests. Every font, style and script is served from this domain, so no other party sees that you visited.
  • No advertising, and no data sold or shared for advertising.
  • There is no mailing list, so there is nothing to unsubscribe from.

What is stored on your device

Two things, both in your browser's local storage, both written only if you actually use the feature.

  • systrex-theme holds one word, light or dark, if you use the theme switch in the corner.
  • systrex-timer holds the work timer's settings, such as your interval lengths and choice of alarm.
  • systrex-timer-log holds your work timer history, if you use it: up to 500 sessions from the last 90 days. Each entry is a start time, how long you focused, how long you had planned, and how it ended. The timer has a button to clear it.

Neither is a cookie, so neither is ever sent to this site or to anyone else. They stay in your browser, readable only by this domain. Clearing your site data removes them. Touch neither feature and nothing is stored at all.

Tools marked local

A tool marked local runs entirely inside your browser. Whatever you paste into it is processed on your own machine and is never transmitted. That is a property of how the tool is built, not a promise about how the data is handled after receipt, because it is never received.

This matters most for the tools that read secrets. If you decode a JWT or inspect a certificate signing request here, the token or key stays with you.

Tools marked edge

A tool marked edge has to send something in order to work. Looking up a DNS record or inspecting a certificate means asking the network on your behalf.

For those tools, the value you type, for example the hostname you want checked, is sent to this site so the lookup can be performed. It is used to answer that request and is not stored afterwards. Do not put a secret into a tool marked edge.

What is unavoidable

Being honest about the parts that are not zero. This site sits behind a content delivery network, and like any web host it processes the normal request metadata needed to serve and protect a website. That includes your IP address, the page requested, your user agent, and timing. This is standard operational and security logging, retained on the provider's schedule rather than a schedule set here.

No attempt is made to link that data to a person, to build a profile, or to track you between visits.

Changes

If this ever stops being accurate, this page changes first. If a tool is ever added that needs to handle data differently, it will say so on the tool itself, not only here.