Arelvox offers a growing collection of free online tools for networking, Linux, electronics and everyday development. Every tool runs in your browser, so there is nothing to install and no sign-up. In addition, nothing you type is sent to a server.
To get started, pick a category below and open any tool. For example, network admins usually start with the subnet calculator, while makers often go straight to the electronics calculators. Each tool also has a short guide and an FAQ, so you can learn the theory behind the result.
Networking Tools
First, the networking tools help you plan networks, check IP ranges and estimate transfer times.
Linux Tools
Next, the Linux tools help you get commands, permissions and schedules right the first time.
Electronics Calculators
In addition, these calculators give quick answers for Arduino, ESP32 and Raspberry Pi projects.
Developer and Security Tools
Similarly, these everyday utilities help with code, data and passwords.
Games
Finally, take a break without leaving the terminal.
Why Are These Tools Free?
We build these tools for our own projects first, and then share them with everyone. Because they run entirely in your browser, using standard web technologies documented on MDN Web Docs, they cost almost nothing to host. As a result, we can keep them free and supported by ads instead of accounts or subscriptions.
Missing a tool you need? Tell us on the Contact page, and it may be the next one we build. Meanwhile, explore our articles for step-by-step guides on the same topics.