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Alphanumeric CNPJ Generator
Alphanumeric CNPJ Generator: Generate alphanumeric and CNPJ with speed and clarity. Runs straight in the browser and keeps the workflow lightweight. Built.
No sign-up
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100% free
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Private
The alphanumeric CNPJ (IN RFB 2.119/2022) takes effect in July 2026. This generator uses the official algorithm published by Receita Federal + SERPRO.
The result will appear here
Generated alphanumeric CNPJ(s):
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Why use Alphanumeric CNPJ Generator
People searching for quick answers often land here because Alphanumeric CNPJ Generator matches common searches such as Alphanumeric CNPJ Generator, online alphanumeric and CNPJ and a practical way to handle alphanumeric The page is meant to produce alphanumeric and CNPJ fast, with output that is ready for testing, examples or operational use.
Use Alphanumeric CNPJ Generator when you need to create test-ready output on demand without opening spreadsheets, heavy editors or back-and-forth forms. Useful for developers, analysts and QA routines that need a fast result without writing throwaway scripts. The page is structured to answer the practical question first, then give enough context to review the result with confidence. That matters when you need quantity, consistency and less manual repetition.
Where this tool is most useful
- Quick generation for a practical way to handle Alphanumeric CNPJ Generator
- Clear output that is easier to review and trust for technical review and quick validation
- Local-first handling for Works well in short operational workflows
For client-side tools, the page highlights local execution and practical steps so the result feels trustworthy before you move on. If this step is only part of your workflow, nearby tools like Alphanumeric CNPJ Validator — New 2026 Format, CNPJ Generator and CNPJ Validator — Instant Check help you continue without redoing context from scratch.
Alphanumeric CNPJ Generator
Generate valid alphanumeric CNPJ numbers for software testing and development. Starting July 2026, Brazil's Receita Federal (Federal Revenue Service) will begin issuing CNPJs that contain both digits (0-9) and uppercase letters (A-Z), as established by Instrução Normativa RFB nº 2.119/2022. This change expands the CNPJ numbering capacity from 100 million to over 1.2 billion possible combinations.
The new format maintains 14 characters, but the 8-digit root and the 4-digit branch number can now include letters. Only the two check digits (positions 13-14) remain strictly numeric. The validation algorithm uses the ASCII-48 standard: each character is converted to its ASCII code minus 48, producing values 0-9 for digits and 17-42 for letters A-Z. The check digits are then computed using weighted sums and modulo 97, replacing the traditional modulo 11 used in numeric-only CNPJs.
Our generator implements the official algorithm published by Receita Federal and SERPRO. Generation is 100% client-side — no data is sent to any server. You can produce alphanumeric CNPJs individually or in batches of up to 50, with or without formatting (XX.XXX.XXX/XXXX-XX).
Legal notice: Generated CNPJs are fictitious and not registered with the Receita Federal. They are intended exclusively for software testing. Using fabricated CNPJs for fraud is a crime.
To verify an alphanumeric CNPJ, use our Alphanumeric CNPJ Validator. For traditional numeric CNPJs, see our CNPJ Generator and CNPJ Validator.
Frequently Asked Questions
What does Alphanumeric CNPJ Generator do?
Alphanumeric CNPJ Generator helps you generate alphanumeric and CNPJ with a short, direct workflow. It is meant for people who need an answer quickly without losing the context behind the result.
When should I use Alphanumeric CNPJ Generator?
Use Alphanumeric CNPJ Generator when the priority is speed, repeatability and fewer manual steps. It works well for quick checks, operational routines and situations where you do not want to open a full application for a small task.
Does Alphanumeric CNPJ Generator keep my data private?
For client-side tools, the main processing happens in the browser. That reduces friction for sensitive or temporary inputs and makes the page useful for quick private checks.
How is Alphanumeric CNPJ Generator different from nearby tools?
Alphanumeric CNPJ Generator focuses on one narrow job so the page stays fast and easier to trust. If your workflow continues after this step, Alphanumeric CNPJ Validator — New 2026 Format is the kind of related tool you would use next.
What is the alphanumeric CNPJ?
It is the new CNPJ format established by IN RFB 2.119/2022 that allows letters A-Z in positions previously limited to digits only. It maintains 14 characters and enters into effect July 2026. To validate this format, use our Alphanumeric CNPJ Validator.
How does the ASCII-48 algorithm work?
Each character is converted to its ASCII value minus 48 (digits 0-9 become 0-9, letters A-Z become 17-42). The check digits are calculated using weighted sums and modulo 97, ensuring the integrity of the entire CNPJ. This replaces the modulo 11 used in traditional numeric CNPJs.
Are the generated alphanumeric CNPJs real?
No. They are mathematically valid but do not correspond to any real company in Receita Federal's database. Use them only for development and testing.