Name: Toolpad.in
Rating: 5.0 (1 reviews)

Hey Product Hunt! I'm Harsh, and I built Toolpad — this is my first real product launch, so bear with me. Here's the honest story of why this exists: I was building a side project and spent an embarrassing amount of time just setting up test data. I needed fake credit card numbers to test a payment flow, fake addresses for a form, and a quick way to convert some JSON — and I ended up with six different browser tabs open, each from a different site, half of them showing ads every 3 seconds or asking me to sign up for the "free" plan. I thought — this is a solved problem. Why is it this painful? So I built Toolpad.in from scratch. 𝗪𝗵𝗼 𝘁𝗵𝗶𝘀 𝗶𝘀 𝗳𝗼𝗿: → Developers who need realistic test data fast → QA engineers testing payment forms, telecom systems, address validation → Backend devs who live in JSON and XML all day → Anyone who's bookmarked 10 random utility sites and hates it 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝘁: I didn't use any data generation libraries. Every algorithm is written from scratch — the Luhn checksum for credit cards, the MOD-97 formula for IBANs, real TAC prefix tables for IMEI numbers pulled from actual manufacturer data. The output isn't just random strings — it's structurally correct data that passes real validation checks. The whole frontend is plain HTML, CSS, and vanilla JS — no framework. Everything runs in your browser. Your data never touches a server. I also built a REST API on top of the same core library, with no API key required, because I kept wishing tools like this had one. 𝗪𝗵𝗮𝘁'𝘀 𝗵𝗼𝗻𝗲𝘀𝘁𝗹𝘆 𝗺𝗶𝘀𝘀𝗶𝗻𝗴: This is a v1. I know there are tools missing, edge cases I haven't handled, and things that could be better. That's exactly why I'm here — I want real feedback from people who actually use developer tools every day. If you try it and something feels off, or there's a tool you wish existed — please tell me in the comments. I'm actively building and every piece of feedback shapes what gets added next. Thank you for checking it out. 🔗 toolpad.in

Forum Threads

p/toolpad-in

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4mo ago

I spent 20 minutes setting up test data before writing a single line of code. So I built Toolpad.

The honest story behind Toolpad

I was building a side project and needed some test credit card numbers. Googled it, landed on a sketchy site with 14 ads. Needed fake addresses too different site, different UI, another set of ads. JSON formatting? Another tab.

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Toolpad.in

The dev toolkit you've been bookmarking 10 sites for.

The dev toolkit you've been bookmarking 10 sites for.

Forum Threads

I spent 20 minutes setting up test data before writing a single line of code. So I built Toolpad.

Forum Threads

I spent 20 minutes setting up test data before writing a single line of code. So I built Toolpad.

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What needs improvement

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What's great

What needs improvement

vs Alternatives