- CPF Generator
- CNPJ Generator
- CNH Generator
- PIS/PASEP Generator
- RENAVAM Generator
- RG Generator
- Chassis Generator
- Certificate Generator
- Credit Card Generator
- Phone Generator
- CNS Generator
- Voter ID Generator
- AIH Generator
- Phone Generator
- Passport Generator
- Person Generator
- Company Generator
- Address Generator
- State Registration Generator
- SSN (USA)
- EIN (USA)
- SIN (Canada)
- CURP (Mexico)
- RFC (Mexico)
- DNI (Argentina)
- CUIT/CUIL (Argentina)
- RUT (Chile)
- CI (Uruguay)
- CC (Colombia)
- DNI (Spain)
- NIE (Spain)
- NINO (UK)
- Codice Fiscale (Italy)
- Steuer-ID (Germany)
- NIR (France)
- NIF Generator
- SSN Validator (USA)
- SIN Validator (Canada)
- CUIT Validator (Argentina)
- RUT Validator (Chile)
- CI Validator (Uruguay)
- DNI Validator (Spain)
- NIE Validator (Spain)
- Codice Fiscale Validator (Italy)
- Steuer-ID Validator (Germany)
- NIR Validator (France)
- NIF Validator
Welcome to Help4.Dev
All information generated by Help4Dev is random and intended solely for testing and validation purposes in development environments. No generated data should be used in real or legal contexts.
While we strive to ensure the accuracy and reliability of our tools, it is important to note that errors or inaccuracies may occur. The use of this information is the sole responsibility of the user, who must always act ethically and conscientiously.
Help4Dev does not tolerate the use of its tools for illegal or unethical activities, including but not limited to identity fraud, hacking, or any other action that violates the laws or privacy of third parties. We ask that you make good use of our tools, respecting legal and ethical boundaries.
About Help4Dev
Launched with the aim of making life easier for programmers, testers, and developers, Help4Dev offers free online tools that help automate common daily tasks. Our focus is to provide generators and validators that make software testing and development simpler and faster.
Explore Our Tools
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How does Help4Dev work?
Our tools are simple, fast, and work directly in your browser — no sign-up, no installation required.
Choose a tool
Select the generator or validator you need from the sidebar menu. We have over 90 tools organized by category: Brazilian documents, international documents, and developer utilities.
Generate or validate
Click to generate mathematically valid fictitious data or paste a number to validate it. All algorithms follow the official rules for each document type, ensuring generated data passes your system's validations.
Copy and use in your tests
Copy the result with one click and use it directly in your software tests, staging forms, or automation scripts. Data is generated locally in your browser and is never stored anywhere.
Who is Help4Dev for?
Help4Dev was built for software developers, QA engineers, manual and automation testers, system analysts, and tech students who need valid fictitious data to test applications.
If you work with systems that require CPF, CNPJ, CNH, credit card numbers, or any other document as a mandatory field, our tools eliminate the need to manually invent data or — worse — use real people's data.
Why use fictitious data?
Brazil's General Data Protection Law (LGPD) prohibits the use of real personal data in development and testing environments without consent. Using real CPFs or CNPJs in staging can result in fines of up to R$50 million per violation.
Data generated by Help4Dev is completely fictitious — it doesn't correspond to any real person or company. It passes algorithmic validations, enabling realistic and safe testing in full compliance with Brazilian law.
Frequently Asked Questions
Is the generated data from real people?
No. All data is randomly generated by mathematical algorithms. CPF, CNPJ, and other document numbers are fictitious and do not correspond to any real person or company. They are mathematically valid for testing purposes but do not exist in official registries.
Can I use generated data in production?
No. Help4Dev data is exclusively for development, staging, and software testing environments. Using it in real, legal, or financial contexts is strictly prohibited and may constitute a crime.
Are the tools free?
Yes, all Help4Dev tools are 100% free with no sign-up required. Just visit the site and start using them. There are no usage limits or locked features.
Is my data stored on the server?
No. All generation and validation is processed locally in your browser. No data is sent to our servers or stored anywhere. Your privacy is fully preserved.
Responsible and Ethical Use
Help4Dev is a tool designed exclusively for developers, testers, and technology professionals for use in software development and testing environments. All generated information is fictitious and must not be used for illegal, fraudulent purposes, or in ways that violate the privacy of others.
By using our tools, you agree to our Terms of Use and commit to using generated data ethically and responsibly. Help4Dev is not responsible for the misuse of information generated on its platform.