About ZeroTool

Built for developers, by developers.

Our Mission

ZeroTool is a growing collection of free, privacy-first developer tools for the modern web. We believe that essential developer utilities should be accessible to everyone — regardless of budget, location, or account status. Every tool on ZeroTool is free to use, requires no sign-up, and works directly in your browser.

How It Works

Every tool on ZeroTool runs entirely on the client side. When you paste a JSON document, encode a string to Base64, or generate a UUID, all of that computation happens inside your browser tab. Nothing is sent to our servers. In fact, most tools work perfectly even when you go offline.

This design is intentional. Developers often work with sensitive data — API responses, credentials, private keys, internal configuration files. We wanted to build tools you could trust with that data, and the simplest way to earn that trust is to never touch the data at all.

What We Build

ZeroTool covers a broad range of day-to-day developer needs:

  • Data tools — JSON formatter, diff viewer, CSV converter
  • Encoding tools — Base64, URL encode/decode, HTML entities
  • Text utilities — case converter, lorem ipsum, word counter
  • Security tools — hash generators (MD5, SHA-256), password generators
  • Developer utilities — UUID generator, regex tester, color picker

We ship new tools regularly based on community requests and our own development needs. If a tool is missing, let us know.

Privacy First by Design

We collect no personal data. We have no user accounts. We do not sell advertising that targets individuals. Our analytics (Google Analytics 4) are configured with anonymized IP addresses so we can understand aggregate usage without tracking individuals.

The tools you use, the data you enter, and the results you generate remain entirely on your device. We have no mechanism to access them even if we wanted to.

Open-Source Ethos

ZeroTool is built on open web standards and open-source foundations. We contribute back to the ecosystem where we can and believe in the principle of building in public. Our approach is to keep things simple, fast, and transparent.

Get in Touch

We're a small, independent team. If you have a tool request, found a bug, or just want to say hello, reach out at [email protected]. We read every message.