About Toolpad — Free Developer Tools Suite

What is Toolpad?

Toolpad is a free collection of browser-based developer utility tools. Every tool runs in your browser — no account needed, no data stored, no limits. If you prefer programmatic access, we also provide a free REST API.

Our tools

We currently offer three categories of tools:

Data generators — Generate realistic fake data for software testing: names, addresses, email addresses, phone numbers, IMEI numbers, UUIDs, MAC addresses, IP addresses, credit card numbers, IBANs, and more. All generated data is structurally correct — credit cards pass Luhn validation, IBANs pass MOD-97 checks, UUIDs follow RFC 4122.
Formatters — Prettify, minify, and validate JSON and XML instantly in the browser with clear error messages.
Converters — Transform data between formats: JSON ↔ XML, JSON ↔ CSV, text → JSON/XML, Base64 encode/decode, Hex encode/decode, DOCX → PDF.

Why we built this

Every developer needs test data. Writing scripts to generate fake data takes time and the output is often unrealistic. Tools like Mockaroo are great but have row limits and require accounts for bulk generation. We wanted to build something completely free, fast, and available via API — so developers can generate what they need without friction.

Open source

The core data generation library (@toolpad/core) is open source and available on GitHub. You can install it directly in your Node.js project, use it in CI pipelines, or contribute new generators. All algorithms (Luhn, MOD-97, RFC 4122, MCC-MNC tables) are implemented from scratch with full test coverage.

Technical details

Frontend: Plain HTML, CSS, and vanilla JavaScript — no frameworks, fast load times
Backend API: Node.js + Express
All browser-based tools: 100% client-side, no server calls
Hosting: Global CDN for fast access from anywhere

Disclaimer

All data generated by Toolpad is entirely fictional and intended for software testing and development purposes only. Generated credit card numbers, IBANs, IMEIs, and personal data are not real and must never be used for fraudulent, deceptive, or illegal activities. Any misuse is strictly the responsibility of the user.

Contact

Questions, bug reports, or feature requests: [email protected]

GitHub: github.com/toolpad-in