4Generate

4Generate is an online toolbox offering free generators, validators, formatters, and utilities for developers and everyday tasks, accessible instantly in your browser without installation.

What is 4Generate?

4Generate is a web-based platform that provides a suite of free tools for generating, validating, formatting, and converting data. It takes user input such as numbers, text, or parameters and produces outputs like valid CPF/CNPJ numbers, UUIDs, credit card numbers, fake Brazilian people data, bank account numbers, calculated percentages, character counts, and spelling corrections. The platform runs entirely in the browser and is maintained by the 4Generate team, as indicated on the site.

Key Features

• CPF Generator — generates valid Brazilian CPF numbers for testing purposes, following official algorithms.
• CNPJ Generator — creates valid Brazilian CNPJ numbers for testing form validation or data processing.
• UUID Generator — produces random UUID v4 identifiers for use in databases or API testing.
• Credit Card Generator — generates valid credit card numbers for testing payment systems, supporting major brands.
• CPF Validator — validates CPF numbers and returns whether they are structurally correct.
• People Generator — generates fake Brazilian people data (name, CPF, address, etc.) for test scenarios.
• Bank Account Generator — creates valid Brazilian bank account numbers for testing financial applications.
• Character Counter — counts characters, words, sentences, and lines in real-time as the user types.
• Spelling Checker — checks spelling in Portuguese, English, and Spanish.

Who is it for?

4Generate is designed for:

• Software developers — generate test data like CPF, CNPJ, credit card numbers, and UUIDs for form validation or database seeding.
• QA engineers — validate data integrity using the validators and generate realistic test profiles with the people generator.
• Students and educators — use calculators, character counters, and spelling checkers for academic work.
• General users — perform everyday tasks like percentage calculations, character counting, or spelling checks without installing any app.

What can you do with 4Generate?

• Generate test data for Brazilian applications: Produce valid CPF, CNPJ, bank account, and people profiles for testing local software.
• Validate and format data: Check credit card numbers for brand identification, validate CPF numbers, and count characters or words in text.
• Perform quick calculations and checks: Use the percentage calculator for fast math, or run spelling checks in three languages.

How does 4Generate work?

Each tool operates as a standalone web page. Users navigate to the desired tool (e.g., https://4generate.com/en/ferramentas/cpf-generator/), optionally set parameters, and click a button to generate or validate. Results appear instantly on the same page, with no account or login required.

FAQ

Is 4Generate free?

Yes, all tools listed on 4Generate are available free of charge with no hidden fees or usage limits indicated.

Do I need to create an account?

No account or registration is needed. Simply open the tool and use it directly in your browser.

What languages does the spelling checker support?

The spelling checker supports Portuguese, English, and Spanish.

Are the generated numbers real?

Generated numbers are algorithmically valid (e.g., pass checksum validations) but are not issued by any authority. They are intended for testing only.

Can I use 4Generate on mobile?

Yes, the site is responsive and works on mobile browsers, though some tools are optimized for desktop use.