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Toolpad.in
The dev toolkit you've been bookmarking 10 sites for.
Toolpad — 25+ free browser-based developer tools. No signup. No limits. Fake data generators that actually validate — Luhn-valid credit cards, MOD-97 IBANs, real-TAC IMEIs. JSON & XML formatter, minifier, validator. JSON↔XML, JSON↔CSV, Base64, Hex converters. Everything runs client-side — your data never leaves the browser. Free REST API included, no key required.
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
About Toolpad.in on Product Hunt
“The dev toolkit you've been bookmarking 10 sites for.”
Toolpad.in was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #140 on the daily leaderboard. Toolpad — 25+ free browser-based developer tools. No signup. No limits. Fake data generators that actually validate — Luhn-valid credit cards, MOD-97 IBANs, real-TAC IMEIs. JSON & XML formatter, minifier, validator. JSON↔XML, JSON↔CSV, Base64, Hex converters. Everything runs client-side — your data never leaves the browser. Free REST API included, no key required.
On the analytics side, Toolpad.in competes within Productivity, Open Source and Developer Tools — topics that collectively have 1.2M followers on Product Hunt. The dashboard above tracks how Toolpad.in performed against the three products that launched closest to it on the same day.
Who hunted Toolpad.in ?
Toolpad.in was hunted by Harsh. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Toolpad.in including community comment highlights and product details, visit the product overview.
Harsh