Privacy Policy

Your privacy matters. Actually, that's one of the reasons that I built this (and my other apps). I believe you should have total transparency of how an app works (e.g. access to it's code), and full control over your data. So, weather you're self-hosting Networking Toolbox, or using the public instance, you can be sure that your data is handled with care.

Principles

  • We only collect the minimum data needed for things to work
  • We never store anything which isn't 100% necessary
  • Any stored data stays local in your browser or is encrypted with your own key (we can't access it)
  • We don't use cookies or tracking of any kind
  • We never share your data with anyone else
  • We're transparent about what's collected, stored, used and why
  • Our code is fully open source, so you can verify our claims for yourself

Overview

Networking Toolbox is designed with privacy in mind. All network calculations and most diagnostic tools run entirely in your browser, meaning your data never leaves your device.

Data Processing

Client-Side Processing

The majority of tools (CIDR calculators, IP converters, subnet planners, etc.) perform all calculations locally in your browser. No data from these tools is transmitted to any server.

Server-Side Diagnostic Tools

Some diagnostic tools (DNS lookups, DNSBL checks, TLS tests, etc.) require server-side processing to query external services. For these tools:

  • Only the specific domain or IP address you enter is sent to our server
  • Data is processed in real-time and not stored permanently
  • Requests may be temporarily logged for debugging purposes (logs are automatically purged)
  • No personally identifiable information is collected

Local Storage

We use browser localStorage (not cookies) to save your preferences locally. This data never leaves your device and can be cleared at any time through your browser settings.

  • Theme settings: Your chosen color theme and accessibility preferences
  • Layout preferences: Homepage and navigation layout choices
  • Bookmarked tools: Your saved favorite tools for quick access

All localStorage usage is optional and strictly for your convenience. The application works without it.

Analytics & Tracking

Unless disabled, we log basic anonymous usage statistics using a self-hosted Plausible Analytics instance. This helps us understand which features are most useful and improve the application.

  • Privacy-focused: No cookies, no tracking across sites, no personal data collection
  • Anonymous only: We only collect page views and referrer information - no IP addresses, user agents, or any personally identifiable information
  • Self-hosted: Analytics data stays on our infrastructure and is never shared with third parties
  • Opt-out: You can disable analytics by enabling "Do Not Track" in your browser settings

We do not use any third-party advertising services or tracking scripts that follow you across the web.

Third-Party Services

When using diagnostic tools, your queries may be sent to third-party services:

  • DNS queries: Public DNS resolvers (Google, Cloudflare, Quad9, etc.)
  • DNSBL checks: Spam blacklist providers (Spamhaus, SORBS, etc.)
  • WHOIS/RDAP: Regional Internet registries
  • Certificate checks: Certificate Transparency logs

These services have their own privacy policies and are outside our control.

Self-Hosting

For maximum privacy, you can self-host Networking Toolbox. When self-hosted, you have complete control over all data processing and server logs. See the Self-Hosting section for instructions.

Open Source

Networking Toolbox is fully open source. You can review the code to verify our privacy practices:

Changes to This Policy

This privacy policy may be updated occasionally. Significant changes will be noted in the changelog.

Last updated: January 2025

Questions?

If you have questions about this privacy policy, please open an issue on GitHub.