Free Developer Tools for Testing: IBAN, IMEI, Credit Cards & More

Why Developers Need Test Data Generators

If you've ever built a payment form, a mobile device management system, or a banking integration, you know the pain: you need realistic test data that won't break things.

Using real IBANs, IMEIs, or credit card numbers in development is risky and often illegal. That's why I built a suite of free, open-source tools for generating valid test data.

The Tools

🏦 Random IBAN Generator — randomiban.co

Generates checksum-valid IBANs for 70+ countries. Perfect for:

• QA testing of banking forms
• Unit testing IBAN validation logic
• Populating demo environments

Each generated IBAN follows the real country format (length, structure, check digits) but doesn't correspond to any real account.

📱 Random IMEI Generator — randomimei.com

Generates valid IMEI numbers that pass the Luhn algorithm check. Useful for:

• Mobile app testing
• Device management system development
• Telecom software QA

Supports generation by brand (Apple, Samsung, Xiaomi, etc.).

💳 Credit Card Generator for Testing — namso.io

Generates test credit card numbers based on real BIN patterns (Visa, Mastercard, Amex). Features:

• CVV and expiry date generation
• Multiple output formats
• Bulk generation

Important: These are for development/testing only. They won't work for actual transactions.

🔧 More Developer Tools

• base64decode.co — Base64 encoder/decoder
• randomiban.co — IBAN generator & validator
• hextoascii.co — Hex to ASCII converter
• randommac.com — MAC address generator
• createuuid.com — UUID generator
• jsonformat.co — JSON formatter & validator
• hashgenerator.co — Hash generator (MD5, SHA, etc.)
• password-generator.co — Secure password generator
• makelorem.com — Lorem Ipsum generator

Why Build These?

I was tired of:

1. Googling for test data every time I needed it
2. Using sketchy sites with tons of ads
3. Not being able to generate data in bulk

So I built clean, fast, ad-light tools that just work. All tools are free, no signup required.

Tech Stack

• Backend: Symfony + FrankenPHP
• Frontend: Tailwind CSS
• Hosting: Docker + Caddy reverse proxy
• Multi-language: EN, ES, PT, FR

Feedback Welcome

I'm actively improving these tools. If you have suggestions or find bugs, feel free to reach out.

Which developer tool do you wish existed? Let me know in the comments! 👇