CPF/CNPJ Generator and Validator

Intro

This service provides online tools to generate and validate Brazilian CPF and CNPJ numbers for testing and development. The site states the tools are free and require no registration. It offers both single and batch generation (up to 100 CPF and CNPJ numbers at once) and is described as capable of producing large numbers quickly. An API is available and the API documentation describes the service as high-performance and reliable. A developer guide and API documentation are published alongside the tools.

Key Features

• Generate valid CPF numbers for testing.
• Generate valid CNPJ numbers for testing.
• Validate CPF and CNPJ numbers.
• Batch generation: create up to 100 numbers at once (site-stated limit).
• API access described as high-performance and reliable.
• Developer guide and API documentation available.
• No registration required; service described as completely free.

Note: the public materials emphasize use for testing and development. Several operational details are not published in the public documentation, including API authentication methods, rate limits, commercial terms, and company contact information.

Who this is for

The tools are targeted primarily at developers and testers who need synthetic Brazilian tax numbers for development and QA environments. If you require production guarantees, formal SLAs, detailed authentication flows, or explicit commercial pricing, those items are not shown in the public docs and should be clarified with the service operator before relying on the API in production.